Materials Chain Events

Event calender

2020
September
MoTuWeThFrSaSu
123456
78910111213
14151617181920
21222324252627
282930
Export as iCal calender
  • Upcoming Events
  • SEPTEMBER 2020
  • SFB/TRR 270 Annual Meeting

    28th. September 2020, Annual Meeting, Darmstadt, L2|07 110, Alarich-Weiss-Str. 16

    Time:
    Start: 28th. September 2020 09:00 a.m.
    End: 29th. September 2020 05:00 p.m.

    Annual Meeting of the CRC/TRR 270 - Hysteresis design of magnetic materials for efficient energy conversion

  • CRC 1242 International Conference

    28th. September 2020, International Conference, To be Announced, Campus Essen

    Time:
    Start: 28th. September 2020 09:00 a.m.
    End: 2nd. October 2020 05:00 p.m.

    International conference of the Collaborative Research Centre 1242 "Non-Equilibrium Dynamics of Condensed Matter in the Time Domain"

  • SFB/TRR 247 International Conference

    30th. September 2020, International Conference, Neu-Ulm, Edwin-Scharff-Haus, Silcherstraße 40

    Time:
    Start: 30th. September 2020 09:00 a.m.
    End: 2nd. October 2020 05:00 p.m.

    International Conference of the Collaborative Research Centre / Transregio 247

  • NOVEMBER 2020
  • 7. RUHR-Symposium „Functional Materials for Catalysis

    12th. November 2020, Symposium, Duisburg , Fraunhofer-inHaus-Zentrum Duisburg, Forsthausweg 1

    Time:
    Start: 12th. November 2020 08:30 a.m.
    End: 12th. November 2020 05:30 p.m.

    Catalysis as a key technology: In more than 80 percent of all chemical industrial processes, catalysts are used and products are obtained by catalysis. Fuels, fertilizers, plastics and dyes, pharmaceuticals, crop protection agents and auxiliary materials for food or the electrical and semiconductor industries – all this is only made possible by catalysis. Therefore, functional materials for catalysis are focused on the 7th RUHR Symposium. In tandem talks, experts from industrial and academic partnerships will discuss concepts, synergies and exciting scientific results.

    https://ruhr-symposium.de

  • SEPTEMBER 2021
  • ECMolS2021: European Conference on Molecular Spintronics 2021

    7th. September 2021, conference, TU Dortmund University, Dortmund, Germany

    Time:
    Start: 7th. September 2021 09:00
    End: 10th. September 2021 01:00 p.m.

    The group Experimentelle Physik VI at TU Dortmund University lead by Prof. Mirko Cinchetti organizes the ECMolS2021, which is the “European Conference on Molecular Spintronics 2021” that will be held in Dortmund from 07th September to 10th September 2021.

    ECMolS is a series of conferences, whose previous editions took place in Bologna (2016) and in Peniscola (2018). The 2021 edition has the goal to gather the community working in the field of molecular spintronics, that comprises the following research areas: organic spintronics, molecular electronics, molecular magnetism and molecular quantum technologies. In addition to these traditional topics, the third edition of ECMolS will be opened also to scientists investigating 2D materials, with special focus on proximity effects at the interface between two material layers.

    https://www.ecmols2020.tu-dortmund.de

  • NOVEMBER 2021
  • MCIC 2021: Materials Discovery and Processing for Energy

    22nd. November 2021, conference,

    Ruhr-Universität Bochum
    Convention Centre / Veranstaltungszentrum
    Universitätsstr. 150
    44801 Bochum

    Time:
    Start: 22nd. November 2021 08:00 a.m.
    End: 23rd. November 2021 04:00 p.m.

    The third Materials Chain International Conference, MCIC 2021: Materials Discovery and Processing for Energy, will take place from February 25 to February 26, 2021 in Bochum, Germany. The conference will focus on the following topics:

    • Data-driven and combinatorial materials discovery
    • Materials for physical energy conversion, 2D and hybrid fuctional materials
    • Materials for chemical energy conversion
    • Magnetic materials energy conversion
    • Metals and alloys
    • Production engineering and additive manufacturing
    • Transfer: Start-ups and systems

    https://materials-chain.com/news-events/conferences/mcic-2020/

  • Past Events
  • SEPTEMBER 2020
  • Mikro-Nano-Integration

    16th. September 2020, Workshop, Ruhr-Universität Bochum
    Universitätsstraße 150
    44801 Bochum

    Time:
    Start: 16th. September 2020 00:00
    End: 17th. September 2020 00:00

    8th GMM Workshop

    The main focus is on the following areas:

    -Heterogeneous and monolithic integration of and with nanostructures
    -0D / 1D / 2D systems and 2D electronics
    -New materials or material systems
    -Innovative additive or subtractive structuring processes
    -Measurement technology and sensors with and for the MNI interface effects
    -MNI applications, especially in products
    -Current topics, e.g. B. reactive nano-layers, functionalization of interfaces

    Further topics from the field of micro-nano integration are welcome.

    Contact:
    Nicolas Parisel
    nicolas.parisel@vde.com
    VDE/VDI-Gesellschaft Mikroelektronik, Mikrosystem- und Feinwerktechnik (GMM)

    https://www.vde.com/de/gmm/veranstaltungen/veranstaltung?id=17586&type=vde%7Cvdb

  • JULY 2020
  • Introduction - Synthesis of cobalt-iron and cobalt spinel nanoparticles for oxidation catalysis / Structure activity investigation of Co3O4 nano-particles for Oxygen evolution reaction using nanoelectrochemical tools

    Sascha Saddeler, University of Duisburg Essen, Thomas Quast, Ruhr-Universität Bochum, Swapnil Varhade, Ruhr-Universität Bochum
    9th. July 2020, CRC/TRR 247 Colloquium, UDE, Campus Essen, T03 R04 C07

    Time:
    Start: 9th. July 2020 02:15 p.m.
    End: 9th. July 2020 03:45 p.m.

    CRC/TRR 247 colloquium with talks from: Sascha Saddeler: Introduction - Synthesis of cobalt-iron and cobalt spinel nanoparticles for oxidation catalysis Thomas Quast, Swapnil Varhade: Structure activity investigation of Co3O4 nano-particles for Oxygen evolution reaction using nanoelectrochemical tools

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • JUNE 2020
  • Group 6 and 8 Metal Alkylidenes for Olefin Metathesis in Constrained Geometries

    Prof. Dr. Michael R. Buchmeiser, University of Stuttgart
    23rd. June 2020, CRC/TRR 247 Colloquium, UDE, Campus Essen, R11 T03 C54

    Time:
    Start: 23rd. June 2020 02:15 p.m.
    End: 23rd. June 2020 03:45 p.m.

    CRC/TRR 247 colloquium with a talk of Prof. Michael R. Buchmeiser Topic: Group 6 and 8 Metal Alkylidenes for Olefin Metathesis in Constrained Geometries

  • Photocatalytic Alcohol Reforming over CoFe2O4/SrTiO3

    Henning Jansen, Ruhr-Universität Bochum
    9th. June 2020, CRC/TRR 247 Colloquium, Ruhr-Universität Bochum, NBCF 04-679

    Time:
    Start: 9th. June 2020 02:15 p.m.
    End: 9th. June 2020 03:45 p.m.

    CRC/TRR 247 colloquium with a talk from: Henning Jansen Topic: Photocatalytic Alcohol Reforming over CoFe2O4/SrTiO3

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • MAY 2020
  • Smart Design of Heterogeneous Single-site Catalysts for Oxidation Reactions in the Liquid Phase

    Prof. Wolfgang Kleist, Ruhr-Universität Bochum
    26th. May 2020, CRC/TRR 247 Colloquium, The colloquium is taking place via Zoom

    Time:
    Start: 26th. May 2020 02:25 p.m.
    End: 26th. May 2020 03:45 p.m.

    Smart design of heterogeneous single-site catalysts for oxidation reactions in the liquid phase. Via Zoom Contact for further informations: Dr. Franziska Günther Phone: +49 203 37 98171 franziska.guenther@uni-due.de

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • APRIL 2020
  • Annual Meeting of the ProcessNet-Fachgruppe Aerosoltechnik

    2nd. April 2020, Annual Meeting, Fraunhofer-inHaus-Zentrum 47057 Duisburg

    Time:
    Start: 2nd. April 2020 01:00 p.m.
    End: 3rd. April 2020 04:00 p.m.

    Aerosol processes are widely used in materials synthesis, the chemical industry and food technology. The challenges in product design range from understanding and controlling particle formation and growth to the design and operation of aerosol reactors and plants. Especially in the field of spray flame synthesis and gas phase synthesis of nanoparticles, the optimized process design and the production of functional materials with a wide range of properties requires a deeper understanding of the complex particle formation mechanisms. This requires the development and application of specific in-situ analytical methods, the creation of chemical mechanisms through basic kinetic experiments and theoretical calculations as well as a comprehensive simulation of the entire process chain adapted to the problem.

    At the first joint conference of the ProcessNet-Fachgruppe Aerosoltechnik and the DFG Priority Program SPP1980 "Nanoparticle Synthesis in Spray Flames" and the Research Group FOR2284 "Model-based Scalable Gas Phase Synthesis of Complex Nanoparticles", experts from industry and science will discuss current research approaches from topics of common interest and the state of the art.

    Submissions are still possible until 15.01.2020.

    https://www.uni-due.de/cenide/symposium_synthesis.php

  • 4th International Symposium Gas-phase Synthesis of Functional Nanomaterials

    1st. April 2020, Symposium, Fraunhofer-inHaus-Zentrum 47057 Duisburg

    Time:
    Start: 1st. April 2020 08:30 a.m.
    End: 2nd. April 2020 12:30 p.m.

    4th International Symposium
    Gas-phase Synthesis of Functional Nanomaterials: 
    Fundamental Understanding, Modeling and Simulation, Scale-up and Application

    Keynote Speakers:
    Prof. Hai Wang (Stanford University)
    Prof. Matthias Ihme (Stanford University)
    Prof. Sotiris E. Pratsinis (Swiss Federal Institute of Technology ETH Zurich)

    Program (Call for Abstracts):
    Submissions are still possible until 31.01.2020.

    https://www.uni-due.de/cenide/symposium_synthesis.php

  • MARCH 2020
  • Potentials: Workflows for atomistic simulation

    31st. March 2020, Workshop, ICAMS, Ruhr-Universität Bochum

    Time:
    Start: 31st. March 2020 08:50 a.m.
    End: 2nd. April 2020 06:00 p.m.

    At this workshop leading international researchers will give an introduction to simulations and workflows that they use in their research. In the afternoons hands-on tutorials using pyiron will enable the participants to set up their own simulation tasks and workflows.

    http://potentials.rub.de

  • Materials Degradation under Corrosion and Radiation: from First Principles to Alloy Design

    Prof Adrien Couet, Engineering Physics, University of Wisconsin, USA
    19th. March 2020, Seminar, Ruhr-Universität Bochum, IC 03/610

    Time:
    Start: 19th. March 2020 02:30 p.m.
    End: 19th. March 2020 03:30 p.m.

    Materials degradations under extreme environments such as radiation fields and/or high-temperature corrosive electrolytes are currently preventing the fast deployment of efficient and clean sources of energy including thermal energy storage, concentrated solar power and advanced nuclear technologies. In this presentation, the fundamentals of corrosion in high-temperature environments will be introduced with two important examples for the applications described above: (i) zirconium alloy nuclear fuel cladding oxidation and (ii) structural materials corrosion in molten salts. A set of state-of-the-art corrosion tests as well as a suite of characterization methods, including (S)TEM, APT, in-situ electrochemistry and synchrotron micro-XANES have been used to understand the fundamentals of corrosion in these systems. The coupled effects of irradiation on corrosion has also been studied in using a mix of ion-beam irradiation experiments and point defect models. Finally, recognizing that applying a multiscale bottom-to-top alloy design approach is challenging in these extreme environments, high-throughput processing, testing and characterization methods are being developed to explore alloy compositional field response to corrosion and irradiation at an unprecedented pace.

  • New permanent magnet phases from computational design

    Heike Herper, Uppsala University, Sweden
    5th. March 2020, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, Seminar Room IC 02-722

    Time:
    Start: 5th. March 2020 12:00
    End: 5th. March 2020 01:00 p.m.

    The increasing realisation of environmentally friendly technologies goes along with the need of new raw materials and magnetic materials often play a key role. The increasing use of ‘green technologies’ has raised the demand for high performance permanent mag-nets to replace today’s commercial Nd2Fe14B magnets by materials with smaller environ-mental footprints. In addition, new permanent magnets are sought after which can fill the gap between ferrites and high performance magnets.

    Computational design based on ab initio methods has been proven to be an efficient and accurate tool to identify new phases with tailored properties. We have applied two differ-ent approaches. Optimization/modification of known phases has been used to identify e.g. new rare earth lean phases based on the 1:12 (ThMn12) structure. These phases have significantly less rare earth then commercial Nd2Fe14B but need phase stabilizing elements which can reduce the magnetic performance. Several promising phases could be identified. Here, YFe11.5Ti0.5(N) and Nd0.5Y0.5Fe11Ti(N) will be discussed.

    High-throughput methods were exclusively applied to identify so far unexplored rare earth free magnets. One study focusses on existing systems consisting of a 3d and a 5d el-ement plus maximum one other element. The initial structures were taken from ICSD and after a number of calculation and filtering steps 5 candidate phases could be extracted which were previously not discussed as permanent magnets. [1] Identifying novel phases was the goal of a second study where we focussed on Fe-rich binary systems. Using evolutionary algorithms as implemented in USPEX several new candidate phases with magne-tocrystalline anisotropy energies above 1MJ/m3 and Curie temperatures well above room temperature could be identified. [2]

    References:
    [1] arXiv:1910.00548
    [2] S. Arapan et al., PRB 101, 014426 (2020)

  • CENIDE Conference

    2nd. March 2020, Conference,

    Kardinal Schulte Haus
    Overather Straße 51-53
    51429 Bergisch Gladbach
    (www.k-s-h.de)

    Time:
    Start: 2nd. March 2020 10:00 a.m.
    End: 4th. March 2020 04:00 a.m.

    Program Overview:
    After a general overview talk about recent coordinated activities in CENIDE we will have seven topical sessions, one for each of the six CENIDE main research areas and one open topic session. Each session will start with an introductory talk about the topic (25 + 5 minutes) followed by short talks (12 + 3 minutes). Additionally, on Monday and Tuesday we will have poster sessions in the evening. The social event, the evenings, and the numerous breaks throughout the conference will provide plenty of time for individual exchanges and discussions.

    Registration:
    All CENIDE members, young academics, and advanced PhD students are invited. Participation is free of charge, and accommodation will be reserved for all attendees. Submission of an abstract is obligatory for all attendees. On the bases of what will be submitted, the invited speakers and the organization team will decide whether a short talk or a poster will be granted. The best three short talks and the best three posters will be awarded a prize of each 100 Euro. Registrants have the opportunity to apply for a short talk or poster prize. The number of participants is limited and the attendance list will be generated based on a first come first served basis

  • FEBRUARY 2020
  • Surface science and applied catalysis of Co-based spinels and perovskites

    Prof. Günther Rupprechter, TU Wien, Prof. Richard Kramer Campen, University of Duisburg-Essen
    4th. February 2020, CRC/TRR 247 Colloquium, UDE, NETZ, room 2.42, Campus Duisburg

    Time:
    Start: 4th. February 2020 02:15 p.m.
    End: 4th. February 2020 03:45 p.m.

    Science talks of Prof. Günther Rupprechter (TU Wien) and Prof. Richard Kramer Campen (UDE) from 2:15 to 3:45 pm in Duisburg (NETZ, room 2.42). Prof. Rupprechter will present his work on "Surface science and applied catalysis of Co-based spinels and perovskites".

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • JANUARY 2020
  • Magnetic functional materials for cooling and energy harvesting

    Anja Waske, BAM, Berlin
    30th. January 2020, ICAMS IfM Seminar, Ruhr-Universität Bochum, IC 04-410

    Time:
    Start: 30th. January 2020 12:00
    End: 30th. January 2020 01:00 p.m.

    The Materials Science and Technology Seminar is jointly organized by the IfM (Institute for Materials) and ICAMS (Interdisciplinary Centre for Advanced Materials Simulation). Members of the RUB Materials Research Department MRD and of the DGM Regionalforum Rhein-Ruhr are cordially invited to participate in the seminar. For further information please contact: Dr. Manuel Piacenza, icams@rub.de, phone: +49 234 32 25480.

  • Decoding the QCD phase structure with relativistic nuclear collisions

    Prof. Peter Braun-Munzinger, GSI Helmholtzzentrum für Schwerionenforschung GmbH
    29th. January 2020, Physical Colloquium, UDE, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 29th. January 2020 01:00 p.m.
    End: 29th. January 2020 03:00 p.m.

    Physical Colloquium of the Faculty of Physics

    Talk: Decoding the QCD phase structure with relativistic nuclear collisions by Prof. Dr. Peter Braun-Munzinger, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt

  • Magnetic shape memory alloys for energy harvesting

    Manfred Kohl, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
    23rd. January 2020, ICAMS IfM Seminar, Ruhr-Universität Bochum: IC 04-410

    Time:
    Start: 23rd. January 2020 12:00
    End: 23rd. January 2020 01:00

    The Materials Science and Technology Seminar is jointly organized by the IfM (Institute for Materials) and ICAMS (Interdisciplinary Centre for Advanced Materials Simulation). Members of the RUB Materials Research Department MRD and of the DGM Regionalforum Rhein-Ruhr are cordially invited to participate in the seminar. For further information please contact: Dr. Manuel Piacenza, icams@rub.de, phone: +49 234 32 25480.

  • Science at the Institut Laue-Langevin, the European Neutron Source

    Dr. Ingo Hoffmann, Institut Laue-Langevin
    22nd. January 2020, Colloquium, Evonik Industries AG, Gerlingstr. 65 (Tor 3)

    Time:
    Start: 22nd. January 2020 05:00 p.m.
    End: 22nd. January 2020 07:00 p.m.

    Faculty of Chemistry

    Talk: Science at the Institut Laue-Langevin, the European Neutron Source by Dr. Ingo Hoffmann, Institut Laue-Langevin, Grenoble, Frankreich

  • The Chemistry of P4 - A Problem for the Environment?

    Prof. Jan J. Weigand, TU Dresden
    20th. January 2020, Colloquium, UDE, S03 V00 E71, Universitätsstraße 2, Campus Essen

    Time:
    Start: 20th. January 2020 05:15 p.m.
    End: 20th. January 2020 07:00 p.m.

    Inorganic-Chemical Colloquium

    Talk: The Chemistry of P4 - A Problem for the Environment? by Prof. Dr. Jan J. Weigand, Faculty of Chemistry and Food Chemistry, Chair of Inorganic Molecular Chemistry, TU Dresden

  • Magnetic skyrmions at topological insulator surfaces and superconductors

    Prof. Ilya Eremin, Ruhr-Universität Bochum
    15th. January 2020, Physical Colloquium, UDE, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 15th. January 2020 01:00 p.m.
    End: 15th. January 2020 03:00 p.m.

    Physical Colloquium of the Faculty of Physics

    Talk: Magnetic skyrmions at topological insulator surfaces and superconductors by Prof. Dr. Ilya Eremin, Theoretische Physik III, Ruhr-Universität Bochum

  • Velocity-resolved kinetics of elementary reactions in heterogeneous catalysis

    Prof. Alec Wodtke, MPI for Biophysical Chemistry, Göttingen
    14th. January 2020, SFB/TRR 247 Colloquium, UDE, NETZ 2.42, Carl-Benz-Str. 199, Campus Duisburg

    Time:
    Start: 14th. January 2020 02:15 p.m.
    End: 14th. January 2020 03:45 p.m.

    Velocity-resolved kinetics of elementary reactions in heterogeneous catalysis by Prof. Dr. Alec Wodtke MPI for Biophysical Chemistry, Göttingen

    (The talk will also be provided as stream via https://conf.dfn.de/webapp/conference/97959541 )

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • Biofunctionalized Porous Ceramics for Biotechnological Applications

    Dr. Michael Maas, University of Bremen
    13th. January 2020, Colloquium, UDE, S03 V00 E71, Universitätsstraße 2, Campus Essen

    Time:
    Start: 13th. January 2020 05:15 p.m.
    End: 13th. January 2020 07:00 p.m.

    Inorganic-Chemical Colloquium
    Biofunctionalized Porous Ceramics for Biotechnological Applications by PD Dr. Michael Maas, Keramische Werkstoffe und Bauteile / Advanced Ceramics, University of Bremen

  • High-dimensional neural network potentials for atomistic simulations

    Jörg Behler, Georg-August-Universität Göttingen
    13th. January 2020, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-722

    Time:
    Start: 13th. January 2020 01:30 p.m.
    End: 13th. January 2020 02:30 p.m.

    The reliability of the results obtained in computer simulations in chemistry, physics and materials science depends on the quality of the underlying potential-energy surface (PES) providing the systems’ energy and forces. While the most accurate approach is to use electronic structure calculations like density-functional theory on-the-fly, the resulting ab initio molecular dynamics simulations are restricted to small systems and short simulation times. Consequently, a lot of effort has been invested for several decades in constructing more efficient atomistic potentials of varying form and complexity, which provide a direct functional relation between the atomic positions and the potential energy. Often these potentials are based on physical approximations, which necessarily reduce the accuracy of the PES. In recent years a paradigm change has taken place by the introduction of machine learning potentials [1], which employ very flexible mathematical functions without a direct physical meaning to represent a reference set of electronic structure data as accurately as possible. While the first ML potentials based on artificial neural networks have been proposed already in 1995 [2], early neural network potentials (NNPs) were only applicable to small systems containing a few degrees of freedom. Nowadays, machine learning potentials have become a practical tool for large-scale simulations based on three central concepts: the introduction of environment-dependent atomic energy contributions [3], the development of rotationally, translationally and permutation invariant descriptors [3], and a systematic way to build reference data sets for training NNPs [4]. In this talk I will provide an overview about the general methodology of high-dimensional NNPs. Remaining challenges and limitations will be discussed, and some typical applications covering interfaces and bulk materials will be presented. [1] J. Behler, J. Chem. Phys. 145 (2016) 170901. [2] T. B. Blank, S. D. Brown, A. W. Calhoun, D. J. Doren, J. Chem. Phys. 103 (1995) 4129. [3] J. Behler, M. Parrinello, Phys. Rev. Lett. 98 (2007) 146401. [4] N. Artrith, J. Behler, Phys. Rev. B 85 (2012) 04543.

  • Herausforderungen in der Antarktisforschung aus Sicht der computerorientierten Mechanik

    Prof. Jörg Schröder, University of Duisburg-Essen
    8th. January 2020, Physical Colloquium, UDE, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 8th. January 2020 01:00 p.m.
    End: 8th. January 2020 03:00 p.m.

    Physical Colloquium of the Faculty of Physics

    Talk: Herausforderungen in der Antarktisforschung aus Sicht der computerorientierten Mechanik by Prof. Dr.-Ing. habil. Jörg Schröder, Fakultät für Ingenieurwissenschaften, Universität Duisburg-Essen

  • Material-oriented ultra-precision machining: case studies of polycrystalline metal and reaction-bonded ceramic

    Junjie Zhang, Harbin Institute of Technology, Center for Precision Engineering, China
    7th. January 2020, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-718

    Time:
    Start: 7th. January 2020 10:30 a.m.
    End: 7th. January 2020 11:30 a.m.

    Fundamental understanding of microstructural influences and their correlation with macroscopic machining results is essential to improve achievable ultimate machining accuracy of materials. In this talk, we report recent advances in numerical simulations and experiments of diamond cutting of polycrystalline copper and reaction-bonded silicon carbide. For the ductile metallic material, a crystal plasticity based finite element model of diamond cutting of polycrystalline copper is established to characterize the machining anisotropy of the polycrystalline material, which is verified by experiments of nanoindentation, nanoscratching, in-situ SEM diamond cutting and cross-sectional TEM characterization. In particular, the formation mechanism and suppressing strategy of grain boundary surface steps are emphasized. For the hard and brittle ceramic material, the brittle-to-ductile transition behavior in ultrasonic elliptical vibration-assisted diamond cutting of reaction-bonded silicon carbide is revealed by finite element simulations and experimental validations. The geometrical features of silicon particles in silicon carbide matrix are assigned according to realistic microstructural characteristics of the two-phase condense composite material. In particular, the tool-particle interaction and its influence on the machined surface formation are revealed. The above work provides insights into the influence of material properties and internal microstructures on the formation of ultra-smooth surface by ultra-precision machining.

  • DECEMBER 2019
  • Algorithms of Vision: Brains and Machines

    Prof. Alexander Ecker, University of Göttingen
    18th. December 2019, Physical Colloquium, UDE, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 18th. December 2019 01:00 p.m.
    End: 18th. December 2019 03:00 p.m.

    Algorithms of Vision: Brains and Machines by Prof. Dr. Alexander Ecker, Department of Computer Science, Campus Institute Data Science, University of Göttingen

  • 9 RIPT 2019 - Les rencontres internationales de la projection thermique

    11th. December 2019, Conference, Forschungszentrum Jülich GmbH Wilhelm-Johnen-Straße • 52428 Jülich, Germany

    Time:
    Start: 11th. December 2019 09:00 a.m.
    End: 13th. December 2019 06:00 p.m.

    Welcome to the 9th edition of Les Rencontres Internationales de la Projection Thermique (9 RIPT)!

    We are very pleased that we will host the 9 RIPT at Forschungszentrum Jülich. Starting in Lille, the conference moved to Limoges and developed to the most important European event on thermal spray technology. For 2019, the new location will be the first time Jülich!

     

    The last RIPT conference in 2017 attracted 146 participants from 30 countries, 12 overseas and 18 European countries.

    The 23 invited and 83 oral presentations were given in four parallel sessions. Moreover, 34 posters were presented in the poster session.

    We would like to continue in Jülich this successful development and are looking forward to your submission and registration.

    http://www.fz-juelich.de/conferences/RIPT/EN/Home/home_node.html

  • Adsorption of CO on (100) Surfaces of Spinel Co3O4 and CoFe2O4: A DFT Study

    Arjeta Rushiti, Ruhr-Universität Bochum
    12th. December 2019, SFB/TRR 247 Colloquium, NBCF 04-679, Ruhr-University Bochum

    Time:
    Start: 12th. December 2019 02:15 p.m.
    End: 12th. December 2019 03:45 p.m.

    (The talk will also be provided as stream. Therefore, you need the VLC player. Open the player, choose the menu media, open network stream, enter the address rtmp://wowza.rubcast.rub.de/technische_chemie/live and start playback.)

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • Molecular dynamics simulations of nanoindentation and nanoscratching of metals and metal oxides

    Nina Gunkelmann, TU Clausthal, Clausthal-Zellerfeld, Germany
    12th. December 2019, ICAMS IfM Seminar, Ruhr-Universität Bochum, IC 04-410

    Time:
    Start: 12th. December 2019 12:00
    End: 12th. December 2019 01:00 p.m.

    The Materials Science and Technology Seminar is jointly organized by the IfM (Institute for Materials) and ICAMS (Interdisciplinary Centre for Advanced Materials Simulation). Members of the RUB Materials Research Department MRD and of the DGM Regionalforum Rhein-Ruhr are cordially invited to participate in the seminar. For further information please contact: Dr. Manuel Piacenza, icams@rub.de, phone: +49 234 32 25480.

  • The link between magnetism and a stained glass window or a jar of honey

    Prof. Alexander Khajetoorians, Radboud University, Nijmegen
    11th. December 2019, Physical Colloquium, UDE, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 11th. December 2019 01:00 p.m.
    End: 11th. December 2019 03:00 p.m.

    The link between magnetism and a stained glass window or a jar of honey - by Prof. Dr. Alexander Ako Khajetoorians, Scanning Probe Microscopy Department, Institute for Molecules and Materials, Radboud University, Nijmegen

  • Dislocation-based functionality in oxides,

    Jürgen Rödel, TU Darmstadt, Germany
    5th. December 2019, ICAMS IfM Seminar, Ruhr-Universität Bochum: IC 04-410

    Time:
    Start: 5th. December 2019 12:00
    End: 5th. December 2019 01:00 p.m.

    The Materials Science and Technology Seminar is jointly organized by the IfM (Institute for Materials) and ICAMS (Interdisciplinary Centre for Advanced Materials Simulation). Members of the RUB Materials Research Department MRD and of the DGM Regionalforum Rhein-Ruhr are cordially invited to participate in the seminar. For further information please contact: Dr. Manuel Piacenza, icams@rub.de, phone: +49 234 32 25480.

  • Seminar: AGEF und CRC/TRR 247 „Interfacial Solvent“

    5th. December 2019, Seminar,

    UDE, Campus Duisburg
    NETZ, SR 2.42
    Carl-Benz-Str. 199

    Time:
    Start: 5th. December 2019 10:00 a.m.
    End: 5th. December 2019 06:00 p.m.

    Invitation to the joint seminar of AGEF and CRC/TRR 247 "Interfacial Solvent" at University Duisburg-Essen

    https://www.uni-due.de/sfbtrr247/

  • A multi-scale numerical model for crack propagation in a matrix with inclusions

    Theodore Karakasidis, University of Thessaly, Volos, Greece
    2nd. December 2019, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-714

    Time:
    Start: 2nd. December 2019 04:15 p.m.
    End: 2nd. December 2019 05:00 p.m.

    It is well known that crystalline inclusions affect the mechanical properties of materials. A semi-analytical model has been developed in two-dimensions in order to describe the observed behav-iour of crack propagation related with a standalone inclusion, which is in good agreement with the observed behaviour [1]. However, the description of the collective effect of crystalline inclusions on crack propagation as function of concentration, size as well as cohesion energies of matrix and in-clusions is very difficult to treat analytically. The available common simulation methods present sev-eral drawbacks due to the fact that crack propagation is a multiscale phenomenon. Finite Elements permit to simulate large samples, however the continuum approach is not valid at very small scales. On the other hand Molecular Dynamics which describes materials at the atomic scale is very compu-tationally intensive.

    Thus we developed a two dimensional coarse-grained computational approach where the material is separated in small blocks and where we have square crystallites which are surrounded by a grain boundary region. A methodology was developed for creation of material samples with given con-centration of crystalline materials and with a tailored distribution of crystallite sizes. The different blocks are characterized by the corresponding cohesion energy of the materials (matrix, crystalline inclusions and grain boundary zone). A crack is initiated with a given energy and a block of material is broken based on probabilistic arguments, using a modified random walker with a preferred direc-tion. Several crack propagations are performed on a given digital sample and quantities such the mean length of the crack and its velocity are obtained. This way we investigated in a first place the effect of crystalline inclusion material concentration as well as the effect of the size of the crystallites, as well as the effect of the difference of cohesive energies of the matrix and the crystalline inclusion. An important outcome is also that when dealing with small size crystallites on has to take into ac-count the modification of the cohesive energy compared to that of the bulk. The results seem to be in qualitative agreement with the literature results and thus the model seems to be quite promising since can be used with some extensions as an efficient hierarchical simulation methodology, with input either from experimental results or classical/ab-initio-molecular dynamics methods.

    References:
    [1] Charitidis, C. A., Karakasidis, T. E., Kavouras, P., & Karakostas, T. (2007). Journal of Physics: Condensed Matter, 19(26), 266209.

    http://www.icams.de/content/events/?detail=2499

  • NOVEMBER 2019
  • Atomic-scale studies of iron oxide-water interfaces: From UHV to liquid

    Prof. Gareth Parkinson, TU Wien
    19th. November 2019, SFB/TRR 247 Colloquium, UDE, Campus Duisburg, NETZ, Carl-Benz-Str. 199, room 2.42

    Time:
    Start: 19th. November 2019 02:15 p.m.
    End: 19th. November 2019 05:45 p.m.

    Talk of:
    Prof. Gareth Parkinson, TU Wien

    Atomic-scale studies of iron oxide-water interfaces: From UHV to liquid

    (The talk will also be provided as stream via
    https://conf.dfn.de/webapp/conference/97959541)

     

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • Interatomic Potentials from Permutation-Invariant Polynomials

    Professor Christoph Ortner, University of Warwick, Mathematics Institute, Coventry, UK
    13th. November 2019, ICAMS Special Seminar, IC 02-718, ICAMS, Ruhr-Universität Bochum

    Time:
    Start: 13th. November 2019 01:00 p.m.
    End: 13th. November 2019 02:00 p.m.

    I will present the construction of interatomic potentials for materials and molecules based on a body-order expansion (ANOVA, HDRM, cluster expansion), each body order being represented by polynomials satisfying the rotation and permutation symmetry of the "exact" PES. These polynomials are determined in a data-driven fashion from linear fits trained with ab initio data. The two main issues I will discuss are (1) convergence "in theory" as well as on training sets; (2) regularisation and generalisation. Joint work with Alice Allen (Cambridge), Gábor Csányi (Cambridge), Christoph Ortner (Warwick), and Cas van der Oord (Cambridge).

  • Materials Chain Members' Assembly

    7th. November 2019, Members' Assembly, Ruhr-Universität Bochum IC 02/714

    Time:
    Start: 7th. November 2019 04:00 p.m.
    End: 7th. November 2019 00:00

    The annual assembly of the Materials Chain will take place on November 7, 2019 in Bochum.

  • OCTOBER 2019
  • Synthesis of cobalt-iron and cobalt spinel nanoparticles for oxidation catalysis

    Sascha Saddler, University of Duisburg-Essen
    31st. October 2019, SFB/TRR 247 Colloquium, University of Duisburg-Essen: Guest house casino, Reckhammerweg 3, Campus Essen

    Time:
    Start: 31st. October 2019 02:15 p.m.
    End: 31st. October 2019 03:45 p.m.

    Talk of:
    Sascha Saddler, University of Duisburg-Essen

    Synthesis of cobalt-iron and cobalt spinel nanoparticles for oxidation catalysis

    (The talk will also be provided as stream via
    https://conf.dfn.de/webapp/conference/97959541)

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • 8th MikroSystemTechnik Congress "MEMS, Mikroelektronik, Systeme"

    28th. October 2019, Congress, Estrel Berlin
    Sonnenallee 225
    12057 Berlin

    Time:
    Start: 28th. October 2019 00:00
    End: 30th. October 2019 00:00

    The MikroSystemTechnik Congress is the outstanding national platform in the field of microelectronics, microsystems and precision engineering. Thanks to its well-established industrial base, Germany has a strong position here: from MEMS and chip manufacturers to system houses offering complete solutions and many medium-sized companies covering a wide range of sensor and microsystems.
    In addition, there is a broad network of universities and research institutes where, with a view to the trend topic "Internet of Things" (IoT), emphasis is being placed on sensor technology and microsystems and new professorships and research areas are being set up.

    https://www.mikrosystemtechnik-kongress.de/

  • Describing the charged defect redistribution in a ferroelectric domain structure with the Landau-Ginzburg-Devonshire theory

    Ivan Vorotiahin, TU Darmstadt, Germany
    17th. October 2019, ICAMS Special Seminar, Ruhr-Universität Bochum, IC 02-718

    Time:
    Start: 17th. October 2019 10:00
    End: 17th. October 2019 11:00

    he process of aging can be a crucial factor in functioning of ferroelectric-based devices. Manifesting itself in a long-time run, it changes the characteristics of a ferroelectric material and may be caused by migration of charged defects and impurities, intentionally or unintentionally introduced into the bulk. While it is established that the aging influences the shape of hysteresis loops, the experimental observations also suggest that the influence extends to the change of the domain array. As more understanding of the governing processes is needed, they can be explained by analysing the model domain array and its evolution in time influenced by mobile charged defects. For this purpose, the Landau-Ginzburg-Devonshire theory is extended to account for the charged species movement, allowing them to redistribute over time, compensating the depolarization fields, which represents one of the aging mechanisms. The analysis of changes in the domain structure and its characteristics caused by the defect redistribution allows to separate different subprocesses and establish their hierarchy, giving a insight into the microscopic reasons and mechanisms leading to modifications of the domain array.

    http://www.icams.de/content/events/?detail=2479

  • JULY 2019
  • PF19: The 4th International Symposium on Phase-Field Modelling in Materials Science

    22nd. July 2019, Conference, Conference Centre, Ruhr-Universität Bochum

    Time:
    Start: 22nd. July 2019 09:00 a.m.
    End: 25th. July 2019 06:00 p.m.

    The 4th International Symposium on Phase-Field Modelling in Materials Science (PF 19), to be held at the Ruhr-Univerität Bochum / Germany, is intended to provide an excellent forum for the growing phase-field community. We aim to cover a broad field of theoretical modelling, numerical methods and applications related to phase-transitions, moving boundary problems, pattern formation and microstructure evolution in general. Also model integration into a multi-scale, multi-physics framework are of high interest. The covered topics include:

    • Model development and analytics
    • Numerical implementation and benchmark tests
    • Microscopic / Mesoscopic phase-field models
    • Phase-field crystal
    • Solidification and diffusion controlled transformation
    • Rapid solidification, mixed mode transformation and strong deviation from equilibrium
    • Solid state and structural transformation
    • Interaction of dislocations with precipitates and grain boundaries
    • Large deformation and fracture
    • Material architecture, topology design and microstructure optimization
    • High performance computing and aspects of hierarchical model integration

    We would like to discuss latest advancements and future directions for these approaches, hence contributions covering unpublished results or work in progress are particularly encouraged. We also highly appreciate contributions dealing with the experimental validation of models named above. We expect that a wide range of applications, from solidification to fracture, phase transformation and microstructure evolution in general, polycrystalline and multiphase materials, hybrid materials, functional, and biological materials will be covered.

    http://pf19.rub.de

  • IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes

    16th. July 2019, Workshop, Ruhr-Universität Bochum
    Building ID
    Universitätsstraße 150
    44801 Bochum
    Germany

    Time:
    Start: 16th. July 2019 00:00
    End: 18th. July 2019 00:00

    IMWS-AMP 2019 conference represents a unique and unprecedented opportunity to bring together researchers and practitioners of different background (materials scientists, chemical experts, physicists, microwave engineers and process technologists), to share the most recent advances in new materials and manufacturing processes, which represent the key for the development of future RF, microwave, mm-wave and THz devices, circuits and systems. IMWS-AMP 2019 is organized by the IEEE Microwave Theory and Techniques Society (MTT-S) with the technical co-sponsorship of the European Microwave Association (EuMA). The conference will feature an exciting technical program and invited talks by worldwide recognized experts in materials and manufacturing processes.

    The purpose of IMWS-AMP 2019 is to boost technical and educational activities as well as exchanges and collaborations within the international microwave community. Perspective authors are cordially invited to submit papers in all areas of novel material, advanced manufacturing and processing, and integration techniques for microwave to terahertz circuits and system.

    http://imws-ieee.org/

  • Deformation and defects in minerals: insights from atomic-scale simulations

    Prof Pierre Hirel, Université de Lille, France
    11th. July 2019, ICAMS Special Seminar, ICAMS. Ruhr-Universität Bochum, IC 02-722

    Time:
    Start: 11th. July 2019 10:00 a.m.
    End: 11th. July 2019 11:00 a.m.

    The Earth is a hot planet that still dissipates its energy by large-scale convection move-ments in its mantle. This process occurs at the scale of millions of years, and is responsible for events that occur at the surface, such as earthquakes, volcanic activity, or plate tectonics. The constituents of the Earth mantle are solid rocks, that are deformed in extreme creep conditions. Thus, the whole process of convection depends on the collective deformation of the minerals that constitute the mantle.

    We propose a bottom-up approach that relies on the study of elementary mechanisms at the atomic scale, and that aims towards phenomenological laws. To that end, atomic-scale simulations are performed in idealized minerals. They reveal that dislocation glide is a pre-dominant mechanism in some phases, but can be completely inhibited in some other phas-es. In the latter case, deformation has to occur through different mechanisms, such as diffu-sion, dislocation climb, or grain boundary activity.

    www.icams.de

  • The Epistemology of the Large Hadron Collider

    10th. July 2019, Physikalisches Kolloquium, UDE, UDE, MC 122, Carl-Benz-Str. 201, Campus Duisburg

    Time:
    Start: 10th. July 2019 12:45 p.m.
    End: 10th. July 2019 02:00 p.m.

    Talk of: Prof. Robert Harlander, Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen

     

    Ansprechpartner:

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Workshop on 2d and hybrid materials

    5th. July 2019, Workshop, Ruhr-Universität Bochum
    Convention Centre, room 1
    Universitätsstr. 150
    44801 Bochum

    Time:
    Start: 5th. July 2019 09:00 a.m.
    End: 5th. July 2019 04:00 p.m.

    Quantum materials are expected to play an important role for the implementation of future quantum technologies. The workshop will review current activities in the field with a focus on the UA Ruhr. It will further provide a platform for exchange and fostering collaborations. Participants are encouraged to present their work in a poster session.
    Participation is free of charge and open to all interested researchers. Please register before 7 June 2019 via email to pia.aleithe@materials-chain.ruhr. In your email, please also include the title of your poster (if any).
    Please feel free to forward this information to interested colleagues.

  • Electrifying Organic Synthesis

    Prof. Dr. Siegfried R. Waldvogel, Organic Chemistry, Johannes Gutenberg University Mainz, Germany
    4th. July 2019, , Ruhr-Universität Bochum
    Universitätsstr. 150/br> 44801 Bochum/br> lecture hall HNC 30

    Time:
    Start: 4th. July 2019 05:00 p.m.
    End: 4th. July 2019 00:00

    This lecture is part of the Interdisciplinary Lecture Series Chemistry and Biochemistry at Ruhr-Universität Bochum.

    http://www.chemie.ruhr-uni-bochum.de/imperia/md/content/chemie/gdch/gdch-programm_ss19.pdf

  • Advanced intermetallic titanium aluminides - from fundamentals to application

    Prof. Dr. Svea Mayer, Montanuniversität Leoben
    4th. July 2019, ICAMS IfM Seminar, Ruhr-Universität Bochum, IC 04-410

    Time:
    Start: 4th. July 2019 04:00 p.m.
    End: 4th. July 2019 05:00 p.m.

    The Materials Science and Technology Seminar is jointly organized by the IfM (Institute for Materials) and ICAMS (Interdisciplinary Centre for Advanced Materials Simulation). Members of the RUB Materials Research Department MRD and of the DGM Regionalforum Rhein-Ruhr are cordially invited to participate in the seminar. For further information please contact: Mrs. Suzana Römer, suzana.roemer@rub.de, phone: +49 234 32 23022.

  • First-principles-based calculations of caloric effects in ferroelectrics and multiferroics

    Prof. Dr. Claude Ederer, Materials Theory, ETH Zurich
    4th. July 2019, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC-02-722

    Time:
    Start: 4th. July 2019 10:00 a.m.
    End: 4th. July 2019 11:00 a.m.

    So-called ferro-caloric effects, i.e. a change of temperature under application of an external field, are currently under intense investigation as a potential solution for future solid-state cooling devices, which promise to be more energy-efficient and environmentally-friendly than currently used devices. These effects are particularly strong in ferroic materials close to the ferroic ordering temperatures, where modest fields can lead to huge entropy changes by ordering electric or magnetic dipoles or other orientational degrees of freedom. Here, I will show how first-principles-based calculations can be used to explore ways for optimizing the caloric response of ferroelectric materials, and I will discuss the possibility to use cross-caloric effects in multiferroics such as strained SrMnO3, where the magnetic and ferroelectric ordering temperatures can be tuned to coincide.

  • Peer Instruction and Flipped Classroom in der Service-Lehre

    Prof. Dr. Joachim Enders, TU Darmstadt, Germany
    1st. July 2019, Physics Colloquium lecture series, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNB

    Time:
    Start: 1st. July 2019 12:00 p.m.
    End: 1st. July 2019 00:00

    This lecture is part of the Physics Colloquium Lecture Series at Ruhr-Universität Bochum.

    https://www.physik.ruhr-uni-bochum.de/fileadmin/data/Veranstaltungen/Physikalisches_Kolloquium/SoSe19/Ankuendigungen/PhysikKolloquium_Ankuendigung_1.7.19.pdf

  • JUNE 2019
  • Nanoelectrochemistry – unraveling intrinsic material (re-)activities by single nanoparticle studies

    Prof. Dr. Kristina Tschulik, ‘Electrochemistry and Nanoscale Materials’, Analytical Chemistry II, RUB
    27th. June 2019, Interdisciplinary Lecture Series Chemistry and Biochemistry, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNC 30

    Time:
    Start: 27th. June 2019 05:00 p.m.
    End: 27th. June 2019 00:00

    This lecture is part of the Interdisciplinary Lecture Series Chemistry and Biochemistry at Ruhr-Universität Bochum. This is an inaugural lecture.

    http://www.chemie.ruhr-uni-bochum.de/imperia/md/content/chemie/gdch/gdch-programm_ss19.pdf

  • Nontrivial Triplon Topology in Kitaev-Heisenberg--type Excitonic Magnets

    19th. June 2019, Physical Colloquium, UDE, MC 122, Carl-Benz-Str. 201, Campus Duisburg

    Time:
    Start: 19th. June 2019 12:45 p.m.
    End: 19th. June 2019 02:00 p.m.

    Ansprechpartner:

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • From the Electronic Structure to Materials Design

    Dr. Thomas Hammerschmidt, ICAMS, Ruhr-Universität Bochum
    17th. June 2019, Physics Colloquium lecture series, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNB

    Time:
    Start: 17th. June 2019 12:00 p.m.
    End: 17th. June 2019 00:00

    This lecture is part of the Physics Colloquium Lecture Series at Ruhr-Universität Bochum.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Magnetocaloric Effect: From Energy Efficient Refrigeration to Fundamental Studies of Phase Transitions

    Prof. Victorino Franco,, Dpto. Fisica de la Materia Condensada, Universidad de Sevilla, Spain
    12th. June 2019, Physikalisches Kolloquium, UDE, UDE, MC 122, Carl-Benz-Str. 201, Campus Duisburg

    Time:
    Start: 12th. June 2019 12:45 p.m.
    End: 12th. June 2019 02:00 p.m.

    Ansprechpartner

     

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Chemistry of Solid Catalysts: New Insight from

    Prof. Dr. Malte Behrens, UA Ruhr Professor for Materials Chemistry of Catalysis at the University of Duisburg/Essen and Ruhr-Universität Bochum
    6th. June 2019, Interdisciplinary Lecture Series Chemistry and Biochemistry, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNC 30

    Time:
    Start: 6th. June 2019 05:00 p.m.
    End: 6th. June 2019 07:00 p.m.

    This lecture is part of the Interdisciplinary Lecture Series Chemistry and Biochemistry at Ruhr-Universität Bochum. This is an inaugural lecture.

    http://www.chemie.ruhr-uni-bochum.de/imperia/md/content/chemie/gdch/gdch-programm_ss19.pdf

  • ERC grants

    5th. June 2019, Talk, NETZ / Seminarraum 2.42, Carl-Benz-Str. 199, Campus Duisburg

    Time:
    Start: 5th. June 2019 04:00 p.m.
    End: 5th. June 2019 06:00 p.m.

    Wir freuen uns sehr, dass wir Serena DeBeer für einen Vortrag über ihre Erfahrungen zur Beantragung und Durchführung eines ERC grants gewinnen konnten. Aus Erfahrung kann ich sagen, dass Serena das Thema sehr dynamisch und inspirierend vermittelt, sodass man gleich Lust bekommt seinen eigenen Antrag zu verfassen. Gleichzeitig gibt es wertvolle Tipps um die einzelnen Verfahrensstufen zu meistern. Also nicht verpassen und Termin unbedingt vormerken! Der Vortrag wird auf Englisch gehalten.

    Ansprechpartner:

  • MAY 2019
  • CALPHAD modeling, moving forward

    Ursula R. Kattner, Materials Science and Engineering Division National Institute of Standards and Technology, Gaithersburg, MD, USA
    31st. May 2019, ICAMS Special Seminar, Ruhr-Universität Bocum, IC 02-718

    Time:
    Start: 31st. May 2019 01:00 p.m.
    End: 31st. May 2019 02:00 p.m.

    The CALPHAD method is an essential part of computational materials and process development, and many commercial CALPHAD databases are available for this purpose. The history of the CALPHAD method is also the history of constant model improvement and increasing sophistication. Recent efforts are in improving the description of the unaries and increasing incorporation of results from density functional theory which provide the data needed for intricate and accurate modeling of the phases. These data, along with improved model formalisms for the composition dependence, make simplifications less necessary allowing reliable descriptions of multicomponent systems that are increasingly based on extrapolations of binary descriptions while reducing the number or required parameter values. Simultaneously the CALPHAD method is being expanded for the modeling of all kinds of other phase-based properties. For example, the molar volume is a property that is needed for the simulation of numerous materials processes but it has been included only in a handful of proprietary CALPHAD databases. Several assessments of the temperature dependence of the molar volume of the pure elements have been published in the literature using different formalisms. Some of these formalisms are only meaningful when used with the currently accepted lattice stabilities of the pure elements. However, efforts are underway to develop new lattice stabilities of the pure elements that are valid down to 0 K and within this context it is highly desirable that the descriptions of the molar volume are also valid for these temperatures. An overview of these recent developments in CALPHAD modeling will be presented.

  • Insights into the Electrochemical Properties of Transition Metal Oxides from Density Functional Theory Calculations

    Dr. Hamidreza Hajiyani, University of Duisburg-Essen
    23rd. May 2019, CRC/TRR 247 Colloquium, University of Duisburg-Essen, Campus Duisburg, NETZ, Room 4.23, Carl-Benz-Str. 199

    Time:
    Start: 23rd. May 2019 02:15 p.m.
    End: 23rd. May 2019 03:45 p.m.

    Everbody interested in the talks is cordially invited to join us!

    If you want to talk to our speakers, we can arrange an individual discussion or if you want to give a talk or have a guest to invite, please contact Franziska Günther

    https://www.uni-due.de/sfbtrr247/

  • 2nd IMPRS-RECHARGE Symposium Catalysis Towards Greener Chemistry

    20th. May 2019, Symposium,

    Max-Planck-Institut für Kohlenforschung
    Mülheim an der Ruhr

    Time:
    Start: 20th. May 2019 10:00 a.m.
    End: 23rd. May 2019 02:45 p.m.

    The symposium aims to obtain a comprehensive understanding of the concept of "Green Chemistry" by focusing on different dimensions of catalysis such as, Heterogeneous Catalysis, Homogeneous Catalysis, Bio-catalysis and Industrial Catalysis. The symposium is targeted at PhD students, post-docs, scientists and industrial researchers at any level of their career who are closely associated with projects that tackle problems using “greener” approaches. As this symposium is organized by students we also encourage young scientists to participate and get a chance to meet researchers from various fields.

    Dr. Anna Mechler 

    anna.mechler@cec.mpg.de

    https://cec.mpg.de/workshops/ctgc2019/index.php

  • Recent developments of Ni-Ti-Zr and Ni-Mn-Ga High Temperature Shape Memory Alloys

    Prof. Jaume Pons, Universitat de les Illes Balears, Palma de Mallorca/Spain, Dept. Applied Physics
    23rd. May 2019, ICAMS-IFM Seminar, Ruhr-Ubniversität Bochum, IC 04-410

    Time:
    Start: 23rd. May 2019 04:00 p.m.
    End: 23rd. May 2019 05:00 p.m.

    For further information please contact: Mrs. Suzana Römer, suzana.roemer@rub.de, phone: +49 234 32 23022.

  • Reverse non-equilibrium molecular dynamics simulations of silicon phononic crystals

    Ralf Meyer, Laurentian University, Sudbury, Canada
    17th. May 2019, ICAMS Special Seminar, Ruhr-Universität Bochum, IC 02-718

    Time:
    Start: 17th. May 2019 01:00 p.m.
    End: 17th. May 2019 02:00 p.m.

    Phononic crystals are periodically structured, synthetic materials that allow control of the propagation of elastic waves. Through the choice of the parameters of the periodic struc-turing opens the phonon dispersion relations can be modified and vibrational band gaps can be created. Phononic crystals have numerous potential applications in areas such as noise control, ultrasound imaging and telecommunications. Since the principal carriers of heat in non-metallic materials are phonons, nanoscale phononic crystals with operating frequencies in the THz regime can be utilized to control the flow of heat. This has poten-tial applications in energy harvesting and novel heating or cooling technologies.

    In this work, molecular dynamics simulations are used to study the thermal transport properties of silicon phononic crystals. The thermal conductance of the model systems is determined with the help of Reverse Non-Equilibrium Molecular Dynamics (RNEMD). RNEMD is a straightforward method for the determination of thermal conductances. The method has, however, some drawbacks that will be discussed. Results will be shown for the length dependence of the thermal conductance of the phononic crystals.

    http://www.icams.de/content/events/?detail=2445

  • Fatigue ab initio

    Prof. Dr. Siegfried Schmauder, Universität Stuttgart, Universität Stuttgart, Institut für Materialprüfung, Werkstoffkunde und Festigkeitslehre (IMWF)
    16th. May 2019, ICAMS-IFM Seminar, Ruhr-Universität Bochum, IC 04-410

    Time:
    Start: 16th. May 2019 04:00 p.m.
    End: 16th. May 2019 05:00 p.m.

    For further information please contact: Mrs. Suzana Römer, suzana.roemer@rub.de, phone: +49 234 32 23022.

  • Plasmas Facing Materials for Fusion - From Challenge to Realisation

    Dr. Jan Willem Coenen, Forschungszentrum Jülich
    13th. May 2019, Physics Colloquium lecture series, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNB

    Time:
    Start: 13th. May 2019 12:00 p.m.
    End: 13th. May 2019 00:00

    This lecture is part of the Physics Colloquium Lecture Series at Ruhr-Universität Bochum.

    https://www.physik.ruhr-uni-bochum.de/fileadmin/data/Veranstaltungen/Physikalisches_Kolloquium/SoSe19/Ankuendigungen/PhysikKolloquium_Ankuendigung_13.05.19.pdf

  • SFB/TRR 247 Colloquium

    Prof. Dr. Wolfgang Kleist, Ruhr-Universität Bochum
    9th. May 2019, SFB/TRR 247 Colloquium,

    Ruhr-University Bochum
    Universitätsstraße 150
    NBCF 04-679

    Time:
    Start: 9th. May 2019 02:00 p.m.
    End: 9th. May 2019 04:00 p.m.

    Prof. Dr. Wolfgang Kleist, Ruhr-Universität Bochum
    Title: TBA

    https://www.uni-due.de/sfbtrr247/colloquium.php

  • Developing alloys for service in jet engines

    David Dye, Imperial College London, U.K.
    9th. May 2019, ICAMS-IFM Seminar, Ruhr-Universität Bochum, IC-04/410

    Time:
    Start: 9th. May 2019 04:00 p.m.
    End: 9th. May 2019 05:00 p.m.

    The technical challenge of jet engine materials is much more than developing a material that is strong and creep resistant, or even one that performs well in fatigue. It turns out that service experience provides a rich seam of science and alloy development problems related to manufacturing exceptions and environmental degradation. We will begin by looking at the example of NaCl stress-corrosion cracking in Ti-6246 high pressure compressor discs, the related dislocation mechanisms and the challenge of measuring local hydrogen concentration. We will then turn to the long-standing problem of dwell fatigue and the interplay of microtexture, alloying and dislocation mechanisms that lead to crack initiation associated with sustained load holds during climb. Finally we will turn to the challenge of Co/Ni polycrystal superalloy development to address the very large challenge of supplanting conventional Ni superalloys.

  • BOKOMAT 2019 - 7. Bochumer Kolloquium für Martensitische Transformationen

    6th. May 2019, Kolloquium, Ruhr-Universität Bochum, Veranstaltungszentrum/Saal 1

    Time:
    Start: 6th. May 2019 12:30 p.m.
    End: 7th. May 2019 03:30 p.m.

    Um Anmeldung bei burkhard.maass@ingpuls.de wird gebeten.

  • With Plasmas into Space-Physics of Hall Thrusters

    Dr. habil. Sedina Tsikata, Centre National de la Recherche Scientifique Orleans, Frankreich
    6th. May 2019, Physics Colloquium lecture series, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNB

    Time:
    Start: 6th. May 2019 12:00 p.m.
    End: 6th. May 2019 00:00

    This lecture is part of the Physics Colloquium Lecture Series at Ruhr-Universität Bochum.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • APRIL 2019
  • Membrane Development from Industrial Perspectives Translating Intrinsic Material Properties into Module Performance

    Dr. Oliver Conradi, Evonik Creavis GmbH
    15th. April 2019, Technisch-Chemisches Kolloquium,

    University of Duisburg-Essen
    Campus Essen
    Universitätsstr. 2
    S03 V00 E59

    Time:
    Start: 15th. April 2019 03:00 p.m.
    End: 15th. April 2019 05:00 p.m.

    Membrane Development from Industrial Perspectives Translating Intrinsic Material Properties into Module Performance.
    Dr. Oliver Conradi, Advanced Membrane Materials Science & Technology Evonik Creavis GmbH

  • Enhanced Sampling Approaches to Capture Atomistic Processes during Structural Phase Transformations in Condensed Matter Systems

    Dr. Jutta Rogal, ICAMS, Ruhr-Universität Bochum
    15th. April 2019, Physics Colloquium lecture series, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNB

    Time:
    Start: 15th. April 2019 12:00 p.m.
    End: 15th. April 2019 00:00 p.m.

    The lecture is part of the Physics Colloquium Lecture Series at Ruhr-Universität Bochum.

    https://www.physik.ruhr-uni-bochum.de/fileadmin/data/Veranstaltungen/Physikalisches_Kolloquium/SoSe19/Ankuendigungen/Ankuendigung_15.4_4.pdf

  • Multiphasefield modeling on mesoscopic length scale: Application to martensitic phase transformation and crack propagation

    Dr. Daniel Schneider, Karlsruhe Institute of Technology (KIT), Institute of Applied Materials - Computational Materials Science (IAM-CMS)
    11th. April 2019, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04-410

    Time:
    Start: 11th. April 2019 04:00 p.m.
    End: 11th. April 2019 05:00 p.m.

  • Haloniumsupramolecular Chemistry, New Molecular Capsules

    Prof. Dr. Kari Rissanen, Dept. of Chemistry, University of Jyväskylä, Finland
    11th. April 2019, Interdisciplinary Lecture Series Chemistry and Biochemistry, Ruhr-Universität Bochum
    Universitätsstr. 150
    44801 Bochum
    lecture hall HNC 30

    Time:
    Start: 11th. April 2019 05:00 p.m.
    End: 11th. April 2019 00:00 p.m.

    This lecture is part of the Interdisciplinary Lecture Series Chemistry and Biochemistry at Ruhr-Universität Bochum.

    http://www.chemie.ruhr-uni-bochum.de/imperia/md/content/chemie/gdch/gdch-programm_ss19.pdf

  • Developing the NIST Materials Resource Registry for sharing and discovery of materials data

    Chandler A. Becker, US National Institute of Standards and Technology, Gaithersburg, USA
    10th. April 2019, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum Room IC 02-718

    Time:
    Start: 10th. April 2019 04:00 p.m.
    End: 10th. April 2019 05:00 p.m.

    The NIST Materials Resource Registry (NMRR) is being developed to facilitate the announcement, discovery, and use of materials-related resources such as repositories, data collections, organizations, projects, services, and software. An international federated network of registry instances, maintained by multiple organizations, will allow participants to make their resource metadata available through the system while still maintaining control over data access. Here we will focus on the content and collaborations related to atomic-scale materials science and discuss how the NMRR fits into the larger data landscape.

  • Synthesis and Characterization of Perovskite Nanoparticles for Oxygen Evolution Catalysis

    Baris Alkan, University of Duisburg-Essen
    9th. April 2019, CRC/TRR 247 Colloquium, University of Duisburg-Essen, Campus Duisburg, MB 143

    Time:
    Start: 9th. April 2019 02:15 p.m.
    End: 9th. April 2019 03:45 p.m.

    Everbody interested in the talks is cordially invited to join us!

    If you want to talk to our speakers, we can arrange an individual discussion or if you want to give a talk or have a guest to invite, please contact Franziska Günther

    https://www.uni-due.de/sfbtrr247/

  • MARCH 2019
  • Machine-Learning-Based Interatomic Potentials as Emerging Tools for Materials Chemistry

    Dr. Volker Deringer, University of Cambridge
    21st. March 2019, CRC/TRR 247 Colloquium, University of Duisburg-Essen, Campus Essen, T03 R03 D82

    Time:
    Start: 21st. March 2019 02:15 p.m.
    End: 21st. March 2019 03:45 p.m.

    Everbody interested in the talks is cordially invited to join us!

    If you want to talk to our speakers, we can arrange an individual discussion or if you want to give a talk or have a guest to invite, please contact Franziska Günther

    At 1:45 pm coffee and cookies will be served.

  • FEBRUARY 2019
  • New Approaches to Sustainable Photocatalyst Materials

    Prof. Dr. Candace Chan, Arizona State University
    28th. February 2019, CRC/TRR 247 Colloquium, University of Duisburg-Essen, Campus Duisburg, NETZ, Room 4.23, Carl-Benz-Str. 199, 47057 Duisburg

    Time:
    Start: 28th. February 2019 02:15 p.m.
    End: 28th. February 2019 03:45 p.m.

    Everbody interested in the talks is cordially invited to join us!

    If you want to talk to our speakers, we can arrange an individual discussion or if you want to give a talk or have a guest to invite, please contact Franziska Günther

    At 1:45 pm coffee and cookies will be served.

    https://www.uni-due.de/sfbtrr247/

  • Exploring active sites and mechanisms in liquid-phase redox catalysis by (coupled) in situ/operando spectroscopy

    Prof. Angelika Brückner, LIKAT Rostock
    7th. February 2019, TRR247 Colloquium, University of Duisburg-Essen, Essen Campus, room will be announced soon (please check the website https://www.uni-due.de/sfbtrr247/colloquium.php)

    Time:
    Start: 7th. February 2019 02:15 p.m.
    End: 7th. February 2019 03:45 p.m.

    https://www.uni-due.de/sfbtrr247/

  • JANUARY 2019
  • Solute segregation and intergranular embrittlement

    Pavel Lejcek, Academy of Sciences, Prague, Czech Republic
    31st. January 2019, ICAMS-IfM Seminar, Ruhr-Universität Bochum, Seminar room IC 04-408

    Time:
    Start: 31st. January 2019 04:00 p.m.
    End: 31st. January 2019 05:00 p.m.

    One of the most dangerous technical failures of materials is intergranular brittle fracture (temper embrittlement) as it proceeds very quickly and its appearance is often hardly predictable. It is known that this phenomenon is closely related to the chemistry (solute segregation) of grain boundaries and free surfaces. To elucidate the effect of individual solutes on embrittlement of various materials such as steels and nickel-base superalloys, grain boundary and surface segregations were extensively studied in many laboratories throughout the world. In this talk our effort in this field is summarized concerning (1) Anisotropy of grain boundary segregation and classification of high angle grain boundaries; (2) Grain boundary segregation diagram; (3) Enthalpy/entropy compensation effect; (4) Prediction of grain boundary segregation; and (5) Segregation volume. Finally, calculated data and experimental results on grain boundary segregation and embrittlement will also be compared and the differences between them will be discussed.

  • Adaptive isogeometric phase-field modelling of fracture

    Markus Kästner, TU Dresden
    24th. January 2019, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04/410

    Time:
    Start: 24th. January 2019 04:00 p.m.
    End: 24th. January 2019 05:00 p.m.

  • Levitated optomechanics with rotating nanoparticles

    Dr. rer. nat. Benjamin Stickler, Universität Duisburg-Essen
    23rd. January 2019, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 23rd. January 2019 01:00 p.m.
    End: 23rd. January 2019 03:00 p.m.

    Levitating nanoscale particles in a laser field and optically cooling them into the quantum regime offers an attractive route towards fundamental tests of quantum mechanics and ultra-sensitive sensors. As demonstrated recently, the interaction between the nanoparticle and the light field can be increased by using rod-shaped objects instead of spheres [1-3]. In this talk I will present the quantum theory of nanorotors interacting with laser fields [4] and ambient environments [5] and argue that cooling the rotation of aspherical nanoparticles into the deep quantum regime opens the door for the observation of macroscopic orientational quantum revivals [6], a complete recurrence of the intial orienation after integer multiples of the revival time.

    [1] Kuhn, Asenbaum, Kosloff, Sclafani, Stickler, Nimmrichter, Hornberger, Cheshnovsky, Patolsky, and Arndt, Nano Lett. 15 5604 (2015)
    [2] Hoang, Ma, Ahn, Bang, Robicheaux, Yin, and Li, Phys. Rev. Lett. 117 123604 (2016)
    [3] Kuhn, Stickler, Kosloff, Patolsky, Hornberger, Arndt, and Millen, Nat. Commun. 8 1670 (2017)
    [4] Stickler, Nimmrichter, Martinetz, Kuhn, Arndt and Hornberger, Phys. Rev. A 94 033818 (2016)
    [5] Stickler, Schrinski, and Hornberger, Phys. Rev. Lett. 121, 040401 (2018).
    [6] Stickler, Papendell, Kuhn, Millen, Arndt, and Hornberger, arXiv:1803.01778 (2018)

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Plasmonic Nanomaterials for Biosensing and Bioimaging

    Prof. Dr. Luis Liz-Marzan, San Sebastián
    16th. January 2019, GDCh Colloquium, University of Duisburg-Essen, Campus Essen, Room S07 S00 D07

    Time:
    Start: 16th. January 2019 05:15 p.m.
    End: 16th. January 2019 07:00 p.m.

  • X-ray imaging at the nanoscale: ptychography, holography and tomography

    Prof. Dr. Tim Salditt, Institute for X-Ray Physics, Georg-August-University Göttingen
    16th. January 2019, Physical Colloquium, University of Duisburg-Essen Campus Duisburg Room MC 122

    Time:
    Start: 16th. January 2019 01:00 p.m.
    End: 16th. January 2019 02:00 p.m.

    X‐rays can deeply penetrate matter and thus provide information about the functional (interior) architecture of complex samples, from biological tissues and cells to nanoscale composite materials. Until recently, however, this potential of hard x‐rays in view of penetration, spatial resolution, contrast, and compatibility with environmental conditions was significantly limited by the lack in suitable in x‐ray optics. With the advent of highly brilliant radiation, and the development of lens‐less diffractive imaging and coherent focusing, the situation has changed. We now have nano‐focused coherent x‐ray synchrotron beams at hand to probe nanoscale structures both in scanning and in full field imaging and tomography. We explain how the central challenge of inverting the coherent diffraction pattern can be mastered by different reconstruction algorithms in the optical far and nearfield. In particular, we present full field projection imaging at high magnification, recorded by illumination with advanced x‐ray waveguide optics [1], and show how imaging and diffraction can be combined to investigate biomolecular structures within biological cells. We present different examples of biophysical and biomedical applications [2,3], including 3dvirtual histology of human brain tissue [4].


    [1] M. Bartels, M. Krenkel, J. Habe, R.N. Wilke, T. Salditt, X‐Ray Holographic Imaging of Hydrated Biological Cells in Solution, Phys. Rev. Lett. 114, 048103 (2015). [2] M. Krenkel, A. Markus, M. Bartels, C. Dullin, F. Alves, T. Salditt, Phase‐contrast zoom tomography reveals precise locations of macrophages in mouse lungs, Sci.Rep. 5, 09973 (2015). [3] M. Bernhardt, J.‐D. Nicolas, M. Osterhoff, H. Mittelstädt, M. Reuss, B. Harke, A. Wittmeier, M. Sprung, S. Köster, T. Salditt Correlative microscopy approach for biology using x‐ray holography, x‐ray scanning diffraction, and STED microscopy, Nat. Comm. 9: 3641 (2018) [4] M. Töpperwien, F. Van der Meer, C. Stadelmann, and T. Salditt Three‐dimensional virtual histology of human cerebellum by X‐ray phase‐contrast tomography, Proceedings of the National Academy of Sciences (2018), 201801678

  • Single ion microscopy and single ion implantation for novel quantum technologies

    Ferdinand Schmidt-Kaler , Johannes Gutenberg Universität Mainz
    14th. January 2019, Physikalisches Kolloquium, Ruhr-Universität Bochum, HZO 20

    Time:
    Start: 14th. January 2019 12:00
    End: 14th. January 2019 01:00 p.m.

    Quantum technologies allow for fully novel schemes of computing, simulation and sensing. For quantum computing, we employ trapped ions in modern segmented ion traps as scalable and freely reconfigurable qubit register. I will give an overview of the recent progress, where gate fidelities of 99.995% (single bit) and 99.6% (two bit) are reached. Alternative platforms for quantum computers in solid state technology would largely benefit from deterministic schemes to fabricate qubit registers with nm-accuracy. I describe our deterministic ion source, which allows for delivering Ca+ ions on demand and focus it into a spot of a few nm. The source can be operated with any other doping ion, which is co-trapped and sympathetically cooled together with a single Ca+ ion, eventually extracted and implanted. We have started structuring solid state samples such as diamond with N2+ molecular ions to generate NV centers, and implanting rate-earth Presodym or Cer ions. In the last part of my talk I highlight perspectives for solid state quantum devices and ultimately for building a quantum repeater. In a common effort with several groups in Germany we aim for such demonstrator to provide secure quantum key exchange over large distances.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Reactive magnetron sputter deposition of thin films : an overview of experiments at DRAFT, University of Ghent

    Diederik Depla, Solid State Sciences Department, Ghent University
    10th. January 2019, ICAMS-IfM Seminar, Room IC 04/408, Ruhr-Universität Bochum

    Time:
    Start: 10th. January 2019 04:00 p.m.
    End: 10th. January 2019 05:30 p.m.

  • Oxidation electrocatalysis. From the nanoscale to devices

    Prof. Wolfgang Schuhmann, Ruhr-University Bochum
    10th. January 2019, TRR247: COlloquium, Ruhr-University Bochum, Room NBCF 04-679

    Time:
    Start: 10th. January 2019 02:15 p.m.
    End: 10th. January 2019 03:45 p.m.

       The talk will also be provided as live-stream. Therefore, you need the VLC player. - Open the player, - choose the menu media, - open network stream and - enter/copy the address (rtmp://wowza.rubcast.rub.de/technische_chemie/live) and - start playback.

       For the following discussion, you can use the chat function in moodle (https://moodle.ruhr-uni-bochum.de/m/course/view.php?id=19415) to submit your questions (Password: CHEMIE).

    Members of RUB can log in via www.moodle.rub.de

    Members of University Duisburg-Essen can log in via https://moodle.ruhr-uni-bochum.de/m/auth/shibboleth/login.php

    Users outside of UA Ruhr have to create a new user. Please follow the link https://moodle.ruhr-uni-bochum.de/m/login/signup.php?lang=de

    https://www.uni-due.de/sfbtrr247/

  • New materials for spintronics: ferromagnets vs. antiferromagnets

    Prof. Dr. rer. nat Ulrich Nowak, University of Konstanz
    9th. January 2019, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 9th. January 2019 01:00 p.m.
    End: 9th. January 2019 03:00 p.m.

    Antiferromagnetic materials are in the focus of current research in magnetism because of their potential for applications in spintronics. Possible advantages of spintronic devices based on antiferromagnetic materials include their lack of stray fields, the low susceptibility to external fields, and the rich choice of new materials, including a variety of antiferromagnetic insulators.

    This talk focuses on a comparison between spin dynamics in ferromagnets and antiferromagnets, respectively, based on spin model simulations. We present a new concept for a magnonic spin valve based on a trilayer of insulating ferromagnetic and antiferromagnetic materials and we compare the difference of the spin dynamics of ferro- and antiferromagnets regarding the mobility of their domain walls, their superparamagnetic limit in nanoparticles, and their efficiency for spin torque switching.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Hybrid van der Waals Hetero-Structures in the Quantum Limit

    Dmitri K. Efetov, ICFO - The Institute of Photonic Sciences , Spain
    7th. January 2019, Physikalisches Kolloquium, Ruhr-Universität Bochum, HZO 20

    Time:
    Start: 7th. January 2019 12:00
    End: 7th. January 2019 01:00 p.m.

    The phenomenal improvement in the nano-assembly of vertical van der Waals heterostructures from twodimensional materials such as graphene, transitional metal dichalcogenides (TMDC), complex oxides etc. allows for a shear infinite combination of exotic material properties. Enabled by the ultra-clean and atomically sharp interfaces between the parent materials one can engineer novel complex electronic phases with a dramatically restricted phase space and strong electronic interactions, so enabling enhanced quantum effects and electronic correlations with an immense level of tunability. In this talk we will discuss several recent transport, optical and thermal studies on graphene based vdW heterostructures. We will start with a detailed study of the superconducting proximity effect between vdW coupled graphene and the superconductor NbSe2. Here we demonstrate two long-standing, but not yet observed predictions – the so called specular Andreev reflections at ultra-low Fermi energies, and crossed-Andreev reflections at the Quantum Hall edge at high magnetic fields. We then move on to discuss our novel approach to measure the record low electronic thermal conductivity Gth and heat capacity Ce in ultra-clean encapsulated boron nitride/graphene stacks, using optical excitation and a mK sensitive Johnson noise thermometer. At last we combine the two above device concepts to demonstrate the first working graphene single photon detector.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • DECEMBER 2018
  • Recent progress in high entropy alloy research

    Easo George, University of Tennessee, Knoxville, USA
    20th. December 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04/410

    Time:
    Start: 20th. December 2018 04:00 p.m.
    End: 20th. December 2018 05:00 p.m.

  • Neues (?) von der Halogenbindung

    Prof. Dr. Ullrich Englert, RWTH-Aachen
    17th. December 2018, Kolloquium, Raum S03 V00 E71, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 17th. December 2018 05:15 p.m.
    End: 17th. December 2018 07:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • Multi-scale modelling of materials processing

    Matthias Militzer, The University of British Columbia, Vancouver, Canada
    17th. December 2018, ICAMS Special Seminar, IC 02-718, ICAMS, Ruhr-Universität Bochum

    Time:
    Start: 17th. December 2018 04:00 p.m.
    End: 17th. December 2018 05:30 p.m.

    Computational materials science offers now tremendous opportunities to formulate next generation process models for metals and alloys which are informed on the atomistic mechanisms of microstructure evolution thereby reducing the number of empirical pa-rameters that are typically used in current process models. The challenges and opportuni-ties of implementing advanced computational materials science tools into process mod-els will be critically reviewed for high-performance steels. Here, the austenite-ferrite trans-formations are a key metallurgical tool to improve the material properties. Microstructure evolution kinetics depends on interface migration rates that can be significantly affected by alloying elements, e.g. Mn, Mo and Nb in steels. An approach will be illustrated that links atomistic scale models for the solute-interface interaction with phase field modelling to describe the formation of microstructures with complex morphologies. The overall sta-tus of the multi-scale modelling approach will be analyzed for intercritical annealing of dual-phase steels and the rapid heat treatment cycles in the heat affected zone of line pipe steels. A critical outlook will be provided to propose future research directions to en-hance the computational modelling strategies by truly integrating models across differ-ent length and time scales and by extending fundamental model concepts to multi-component systems that are relevant for commercial steel chemistries.

  • Ultrafast terahertz spectroscopy: probing and controlling fundamental motions of electrons, spins and molecules

    Prof. Dr. Tobias Kampfrath, Freie Universität Berlin and Fritz-Haber-Institut
    12th. December 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 12th. December 2018 01:00 p.m.
    End: 12th. December 2018 03:00 p.m.

    The terahertz (THz) frequency range is attracting increasing interest for both applied and fundamental reasons. On one hand, bit rates in current information technology may soon approach the THz range. Therefore, it is warranted to study the behavior of materials at THz frequencies. This goal is also highly interesting from a scientific viewpoint because its low photon energy (4.1 meV at 1 THz) makes THz radiation an excellent probe of many elementary excitations of solids, for instance lattice vibrations (phonons), conduction electrons, excitons and spin waves. This talk is supposed to provide an introduction to THz spectroscopy of condensed matter. The goal is to illustrate how ultrashort THz electromagnetic pulses (duration <1 ps) can be used as ultrafast Ohmmeters and Amperemeters to gain insight into elementary motions of electrons in plasmas, excitons in semiconductors, spins in metals and rotations of molecules in solvents. Finally, it will be discussed how very strong THz electric and magnetic fields (~MV/cm and ~T) can even be used to gain control over such motions.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Sugars in the Gas Phase - Novel Techniques to unravel the Glycocode

    Prof. Dr. Kevin Pagel, Freie Universität Berlin
    10th. December 2018, Kolloquium, Universität Duisburg-Essen, Seminarraum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 10th. December 2018 04:00 p.m.
    End: 10th. December 2018 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_analytisch_chemisches_kolloquium.shtml

  • Friction Surfacing & Co - unusual joining processes and what we can learn from it

    Stefanie Hanke, Universität Duisburg-Essen
    6th. December 2018, ICAMS-IfM Seminar, Room IC 04/408, Ruhr-Universität Bochum

    Time:
    Start: 6th. December 2018 04:30 p.m.
    End: 6th. December 2018 05:30 p.m.

  • Ultracold atomic quantum gases - exploring novel states of matter from the few- to the many-body regime

    Prof. Dr. Stephanie M. Reimann, Lund University, Sweden
    5th. December 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 5th. December 2018 01:00 p.m.
    End: 5th. December 2018 03:00 p.m.

    Ultra-cold atomic quantum gases have opened up many new possibilities to design, control and manipulate quantum matter. In Europe as well as worldwide there is presently much interest in new quantum technologies that make use of the unique properties of Bose-Einstein condensates or atomic Fermi gases. The talk will review some of the more recent advances in this exciting research field. Furthermore, an outlook will be given on new ideas to explore the thermodynamic properties of many-particle quantum systems. Quantum heat engines with interacting quantum gases as a working medium open interesting new prospects that will be addressed for the example of a quantum Szilard cycle - a thought experiment where a kind of Maxwell’s demon extracts work from the information of the particle distribution. It was recently found that bosons with attractive interactions may enhance the conversion between information and work.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Bound states of vortices: from Kelvin theory of luminiferous aether and Skyrme theory to unconventional superconducting states

    Egor Babaev, KTH Stockholm, Schweden
    3rd. December 2018, Physikalisches Kolloquium, Ruhr-Universität Bochum, HZO 20

    Time:
    Start: 3rd. December 2018 12:00
    End: 3rd. December 2018 01:00 p.m.

    The failed "vortex-atoms" theory of matter by Kelvin and Tait had a profound impact on mathematics and physics. Building on the understanding of vorticity by Helmholtz, and observing stability of smoke rings, they hypothesised that elementary particles (at that time atoms) are indestructible knotted vortices in luminiferous aether: the hypothetical ideal fluid filling the universe. The vortex-atoms theory identified chemical elements as topologically different vortex knots, and matter was interpreted as bound states of these knotted vortices. This work initiated the field of knot theory in mathematics. It also influenced modern physics, with most notable attempt to develop similar ideas being the Skyrme theory of nucleons. An incomplete analogy also exists with the theory of superfluidity, which started with Onsager's and Feynman's introduction of the concept of quantum vortices. Indeed many macroscopic properties of superconductors and superfluids are determined by vortex lines forming different "aggregate states", such as vortex crystals and liquids. Yet these states are still in many respects simpler that the states hypothesized by Kelvin since in the usual superfluids and superconductor vortices do not form bound states. I will discuss unconventional superconducting states, one of them is “type-1.5” superconducting state were vortices have long-range attractive short range repulsive interaction forming bound states with many physical consequences. In the second part of the talk I will discuss that near certain critical points, the hydro-magnetostatics of superconducting states changes completely leading to formation of stables vortex knots characterized by Hopf invariants which behave similarly to those envisaged in Kelvin and Tait’s theory of vortex-atoms in luminiferous aether.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • NOVEMBER 2018
  • Quantum simulation of strong curvature and gauge fields in optical and crystalline systems

    Dr. Nikodem Szpak, Universität Duisburg-Essen
    28th. November 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 28th. November 2018 01:00 p.m.
    End: 28th. November 2018 03:00 p.m.

    We present our work on a new type of quantum simulators for relativistic quantum fields living in curved spaces. They are based on discrete physical systems with lattice geometry, like crystals or optical lattices, and various types of perturbations of their regular structure. Formulation of their effective description in terms of continuous fields, obtained by the application of discrete differential geometry and continuous theory of defects, leads to effective models of quantum fields coupled to emergent gauge fields and curved spaces. Optical lattices and graphene represent, due to their high structural flexibility, the most natural areas of application for these ideas. On the one hand, they offer access to ultra-strong fields not accessible in present experiments and help to study strong field phenomena, like Schwinger pair creation or Hawking radiation. On the other hand, they provide an efficient tool for designing new types of nanodevices based on electron optics or valleyronics which can be used for ultra-sensitive measurements.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Light-matter interaction from first principles in the linear regime and beyond

    Prof. Dr. Caterina Cocchi, HU Berlin
    27th. November 2018, Vortrag, MG 272, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 27th. November 2018 10:00 a.m.
    End: 27th. November 2018 12:00

    Understanding how materials interact with electromagnetic radiation offers a unique perspective on their intrinsic physical properties. First-principles methods are particularly suited to this purpose, as they allow for a reliable description of the electronic structure without depending on empirical parameters. I will demonstrate the predictive power of (time-dependent) density-functional theory and many-body perturbation theory (including the GW method and the Bethe-Salpeter equation) in an overview on my recent research, embracing different kinds of systems and addressing various spectroscopic processes. First, I will focus on optical and x-ray absorption in molecular materials [1-6], where the interplay between intra- and inter-molecular interactions crucially determines the nature of the excitations. Next, I will turn to the nonlinear response of conjugated molecules and present a novel ab initio approach to calculate optical power limiting in good agreement with experiments [7]. Finally, I will demonstrate that the insight on the electronic structure offered by first-principles methods is essential for characterizing novel materials for electron sources and for modelling their photoemission properties [8].

    References

    [1] C. Cocchi and C. Draxl, Phys. Rev. B 92, 205105 and 205126 (2015).
    [2] C. Cocchi, T. Moldt, C. Gahl, M. Weinelt, and C. Draxl, J. Chem. Phys. 145, 234701 (2016).
    [3] C. Cocchi and C. Draxl, J. Phys.: Condens. Matter. 29, 394005 (2017).
    [4] C. Cocchi, T. Breuer, G. Witte, and C. Draxl, submitted (2018).
    [5] A. M. Valencia and C. Cocchi, to be submitted.
    [6] M. Guerrini, C. Cocchi, A. Calzolari, D. Varsano, and S. Corni, in preparation.
    [7] C. Cocchi, D. Prezzi, A. Ruini, E. Molinari, and C. A. Rozzi, Phys. Rev. Lett. 112, 198303 (2014). [8] C. Cocchi, S. Mistry, M. Schmeißer, J. Kuhn, and T, Kamps, submitted (2018); arXiv: 1809.00135.

  • Quantum thermodynamics with photo-assisted Cooper pair tunneling

    Dr. Patrick Potts, Lund University
    23rd. November 2018, Kolloquium, MC351, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 23rd. November 2018 12:00
    End: 23rd. November 2018 02:00 p.m.

    In recent years, there has been increased interest in thermodynamics at the nanoscale, where quantum effects and fluctuations play an important role. Approaches taken from quantum information (e.g. resource theory) provide a new perspective on the study of heat and temperature in quantum systems, complementing established approaches such as thermoelectric investigations. These new approaches often come in an abstract form, making a direct comparison to experiments difficult. In this talk, I will present an experimental architecture which allows to investigate abstract concepts (e.g. the maximal extractable work from a quantum state) with the help of thermoelectric devices, thus providing a bridge between established and novel approaches. The architecture consists of a Josephson junction coupled to multiple resonators and subject to external electric and magnetic fields. This system is extremely versatile as the external fields allow for effectively designing a variety of different Hamiltonians by tuning different terms into resonance. Based on this architecture, I will present theoretical investigations of a heat engine that can reach Carnot efficiency, as well as a machine that extracts the theoretical maximum of work from a number of different quantum states.

  • Models and additive manufacturing, focus on laser cladding process

    Anne Marie Habraken, Université de Liège, Belgium
    22nd. November 2018, ICAMS-IfM Seminar, Room IC 04/408, Ruhr-Universität Bochum

    Time:
    Start: 22nd. November 2018 04:00 p.m.
    End: 22nd. November 2018 05:30 p.m.

  • 8th NRW Nano Conference

    Dr. Lutz Aschke, Trumpf Laser- und Systemtechnik GmbH, Dr. Michael Bäcker, Deutsche Nanoschicht GmbH, Prof. Dr. Stephan Barcikowski, University of Duisburg-Essen, Prof. Dr. Manfred Bayer, TU Dortmund University, Dr. Michael Berkei, BYK-Chemie GmbH, Dr. Guido Bonati, LIMO GmbH, Dr.-Ing. Jean-Frédéric Castagnet, Georgsmarienhütte Holding GmbH, Prof. Dr. Cornelia Denz, University of Münster, Prof. Dr. Elke Dopp, University of Duisburg-Essen, Prof. Dr. Ralf Drautz, Ruhr-Universität Bochum, Prof. Dr. Norbert Esser, Leibniz-Institut für Analytische Wissenschaft Dortmund, Prof. Dr. Armin Gölzhäuser, Bielefeld University, Prof. Dr. Thomas Gries, RWTH Aachen University, Prof. Dr. Detlef Grützmacher, Forschungszentrum Jülich GmbH, Dr. Birgit Hagenhoff, tascon GmbH, Prof. Dr. Michael Heuken, AIXTRON SE, Prof. Dr. Klaus Kallis , TU Dortmund University, Julian Kröger, Georgsmarienhütte Holding GmbH, Dr. Péter Krüger, Covestro Deutschland AG, Prof. Dr. Thomas Kuhlbusch, Federal Institute for Occupational Safety and Health (BAuA), Monika Lelonek, SmartMembranes GmbH, Prof. Dr. Max Lemme, RWTH Aachen University, Prof. Dr. Gregor Luthe, NB GmbH, Prof. Dr. Klaus Meerholz, University of Cologne, Prof. Dr. Wilfried Mokwa, RWTH Aachen University, Dr. Tero Mustonen, BASF SE, Dr. Ewald Niehuis, ION-TOF GmbH, Dr. Hanno Paschke, Fraunhofer-Institut für Schicht- und Oberflächentechnik Dortmund, Prof. Bart Jan Ravoo, University of Münster, Dr. Markus Reifferscheid, SMS group GmbH, Dr. Jürgen Schnekenburger, University of Münster, Dr. Albert Schnieders, CNM Technologies GmbH, Dr. Christoph Weckbecker, Evonik Industries AG, Prof. Dr. Henning Zoz, Zoz Group
    21st. November 2018, Conference, Rheinlanddamm 200, 44139 Dortmund

    Time:
    Start: 21st. November 2018 08:30 a.m.
    End: 22nd. November 2018 05:00 p.m.

    The NRW Nano Conference is Germany’s largest conference with international appeal in the field of nanotechnologies. It takes place every two years at changing locations. More than 700 experts from science, industry and politics meet for two days to promote research and application of the key technology at the network meeting.

    Thanks to NRW’s excellent expertise with the most companies and institutes active in nanotechnology in Germany, the Nano Conference is a fixed event in the calendar. It is characterized by its top-class keynote speakers, numerous lectures and the large exhibition of companies and institutions. In 2018, the NRW Nano Conference will take place for the eighth time – on 21 and 22 November in the Dortmund Congress Centre. Other event formats such as business pitches (short company presentations) and a poster exhibition complete the programme.

    The eighth edition of the NRW Nano Conference is organized by the Ministry of Economic Affairs, Innovation, Digitalization and Energy of the State of North Rhine-Westphalia, the Cluster NanoMicroMaterialsPhotonics.NRW and the Economic Development Agency Dortmund. For the first time, the conference language will be English only in order to account for the international character of science and industry.

    http://nanoconference.de/

  • Mikroelektromechanische Systeme in Optik und Akustik

    Dr. rer. nat. habil. Axel Müller-Groeling, Geschäftsführender Institutsleiter Fraunhofer-Institut für Siliziumtechnologie ISIT
    21st. November 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 21st. November 2018 01:00 p.m.
    End: 21st. November 2018 03:00 p.m.

    Mikroelektromechanische Systeme, abgekürzt MEMS, sind mikroskopisch kleine Komponenten, die im Allgemeinen sowohl mechanisch bewegliche Teile als auch elektronische Funktionen beherbergen. MEMS-Strukturen liegen typischerweise im Größenbereich zwischen einem und einigen hundert Mikrometern. Wichtige Anwendungsgebiete für MEMS findet man heutzutage vorwiegend in der Sensorik: Drucksensoren, Infrarot-Sensoren und vor allem Beschleunigungssensoren, wie sie in praktisch jedem Smartphone verbaut sind, werden mit dieser Technologie realisiert. Neuere Entwicklungen eröffnen MEMS noch viel weitergehende Anwendungsmöglichkeiten, darunter Sensorsysteme für das autonome Fahren (sogenannte LIDAR-Systeme), Mikroprojektoren für virtuelle Realität, optische Cross-Konnektoren und hocheffiziente Mikrolautsprecher für den In-Ohr-Bereich. Ich möchte in meinem Vortrag einen Einblick in die Technologie dieser neuen Anwendungen geben.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • New Brønsted- and Lewis-Superacids Based on Aluminium and Gold

    Prof. Dr. Sebastian Hasenstab-Riedel, Universität Berlin
    19th. November 2018, Kolloquium, Raum S03 V00 E71, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 19th. November 2018 05:15 p.m.
    End: 19th. November 2018 06:45 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • 2. Materials Chain International Conference 2018

    12th. November 2018, Conference, Conference Centre, Ruhr-Universität Bochum

    Time:
    Start: 12th. November 2018 09:00 a.m.
    End: 14th. November 2018 05:00 p.m.

    The second Materials Chain conference figures as a platform for connecting materials research across borders and boundaries – covering the complete materials chain from basic research on materials to applied technologies and from the fundamental description of materials on the atomic scale to the properties of technical components and their manufacturing. The aim of the conference is to highlight recent trends in materials science by giving insight into current top-class research and future prospects in this area.

    http://materials-chain.com/news-events/conferences/mcic-2018/

  • Quantum technologies and quantum control

    Prof. Dr. Tommaso Calarco, Peter Grünberg Institute (PGI-8) - Institute of Quantum Control, Forschungszentrum Jülich GmbH
    14th. November 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 14th. November 2018 01:00 p.m.
    End: 14th. November 2018 03:00 p.m.

    The control of quantum states is essential both for fundamental investigations and for technological applications of quantum physics. In quantum few-body systems, decoherence arising from interaction with the environment hinders the realization of desired processes. In quantum many-body systems, complexity of their dynamics further makes state preparation via external manipulation highly non-trivial. An effective strategy to counter these effects is offered by quantum optimal control theory, exploiting quantum coherence to dynamically reach a desired goal with high accuracy even under limitations on resources such as time, bandwidth, and precision. In this talk I will:
    - introduce the quantum optimal control method we developed to this aim, the CRAB (Chopped Random Basis) algorithm, which is to date the only method that allows to perform optimal control of quantum many-body systems;
    - present experimental results obtained via its application to various physical systems, from quantum logical operations in solid-state quantum optics to quantum criticality in ultra-cold atoms, both in open-loop and in closed-loop feedback scenarios, with applications ranging from quantum interferometry with Bose-Einstein condensates on atom chips to magnetic field sensing in diamond NV centers and to the preparation of optical-lattice quantum registers for quantum simulation;
    - use these examples to illustrate the quantum speed limit, i.e. the maximum speed achievable for a given quantum transformation, and describe related effects of nonlinearity due to interparticle interactions and more in general to dynamical complexity;
    - illustrate a recent experiment in which our algorithm competed against human players in an online game aiming at reaching the speed limit for the remote preparation of a Bose-Einstein condensate in an actual lab.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • An Introduction to Quantum Spin Nematics

    Nic Shannon, Okinawa Institute of Science and Technology , Japan
    12th. November 2018, Physikalisches Kolloquium, Ruhr-Universität Bochum, HZO 20

    Time:
    Start: 12th. November 2018 12:00
    End: 12th. November 2018 01:00 p.m.

    Liquid crystals, in which molecules align to break rotational symmetries of space without at the same time breaking translational symmetries are ubiquitous in nature, and form the basis for many modern display technologies. The idea that a quantum magnet might also act like a liquid crys tal, breaking spin - rotation symmetry without breaking time - reversal symmetry, holds an abiding fascination. However, until recently, such ''spin nematics'' were generally seen as objects of mathematical curiosity, with little connection to reality.

    Happily, the last decade has seen great progess in the understanding of spin nematics, and there is now good reason to believe that spin nematic order should occur in a wide range of systems, including frustrated quantum spin chains in applied magnetic field, spin 1/2 frustrated ferromagnets, and thin films of 3He. Spin nematic order has also been discussed in the context of materials as diverse as the layered triangular lattice magnet NiGa2As4 the cubic spinel CdCr2O4, and the iron chalcoginide FeSe. None the less, making a definitive observation of spin nematic order remains very challenging: because the ground state preserves time reversal symmetry, it is invisible to the most widely used probes of magnetic order. In this talk we explore some of the pr ogress which has been made in understanding quantum spin nematics, addressing three simple questions: what are they, where should you look, and how would you know if you'd found one ? As a concrete example, we explore in more detail the spin excitations of spin - nematic states, and how these might be observed in experiment. We also discuss the most recent evidence for spin nematic order in the frustrated magnets Li2CuVO4, BaCdVO(PO4)2 and volborthite.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Electronic nanosystems in transition

    Prof. Dr. Hans Hilgenkamp, University of Twente
    7th. November 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 7th. November 2018 01:00 p.m.
    End: 7th. November 2018 03:00 p.m.

    Phase transitions are among the most appealing phenomena in nature. The abrupt change of a physical property as a function of e.g., temperature or pressure or other quantities can also disclose important information on the physics underpinning the materials characteristics, and be useful for applications such as sensors or switches.

    One of the attractive features of nanostructures is that they show behavior that is different from macro-scale bulk materials. These also include novel phase transitions, for example when critical dimensions are surpassed, or based on typical nanoscale phenomena such as confinement or quantum-tunneling.

    In this talk, I will discuss three examples; the transition from an insulating to a conducting state in thin film systems of LaAlO3 on SrTiO3 when a critical LaAlO3 thickness is surpassed [1,2], a related magnetic transition in thin films of LaMnO3 on SrTiO3 [3] (see figure), and a current-driven dynamic vortex Mott insulator-to-metal transition in superconducting nanostructured arrays [4].

    [1]: S. Thiel, et al., Science 313, 1942 (2006).
    [2]: A.E.M. Smink, et al., Phys. Rev. Lett. 118, 106401 (2017).
    [3]: N. Poccia, et al., Science 349, 1202 (2015).
    [4]: X.R. Wang et al., Science 349, 716 (2015).

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Can Phosphorus Make a Polymer

    Prof. Dr. Derek Gates, University of British Columbia, Canada
    5th. November 2018, Kolloquium, Universität Duisburg-Essen, Raum S03 V00 E71, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 5th. November 2018 05:15 p.m.
    End: 5th. November 2018 07:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • OCTOBER 2018
  • Kaffee und Napoleon im Physikpraktikum?

    Dr. Heidrun Heinke, RWTH-Aachen
    31st. October 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 31st. October 2018 01:00 p.m.
    End: 31st. October 2018 03:00 p.m.

    Physikalische Praktika bilden einen grundlegenden Bestandteil vieler Studiengänge und gleichzeitig ein spannendes physikdidaktisches Forschungsumfeld. Dabei kann fachdidaktische Forschung und Entwicklung einerseits der Weiterentwicklung von Physikpraktika zuarbeiten, um die einzigartigen Rahmenbedingungen dieser Lehrveranstaltungen besser für eine umfassende Ausbildung der Studierenden nutzbar zu machen. Andererseits eröffnen aber auch neue technische Zugänge zu experimentellen Prozessen attraktive fachdidaktische Forschungsoptionen in physikalischen Praktika, die ihrerseits diese Forschungsoptionen durch einen einfachen Zugang zu größeren Probandenzahlen bereichern. Dies wird anhand von Beispielen mit teils überraschenden Einblicken in das Experimentieren durch Studierende demonstriert.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Hochschulpraktikum Schadensanalyse an metallischen Bauteilen

    Karin Borst, BTS, Alfter, Andreas Ibach, FH Gelsenkirchen, Bocholt, Nebojsa Lakota, EURO-LABOR GmbH, Bochum, Alexander Luithle, Siemens AG, Mülheim, André Mühl, ThyssenKrupp Stell Europe AG, Duisburg, Michael Pohl, Ruhr-Universität Bochum, Johannes Stoiber, AZT Risk & Technology GmbH, München, Fabian Unterumsberger, Mitsubishi Hitachi Power Systems Europe GmbH, Duisburg
    16th. October 2018, Hochschulpraktikum, Beckmanns Hof (IBZ), Ruhr-Universität Bochum

    Time:
    Start: 16th. October 2018 08:30 a.m.
    End: 18th. October 2018 06:30 p.m.

    Das defekte Bauteil ist der Datenträger für Informationen über den Werkstoff und seinen individuellen Zustand, über mechanische, tribologische und korrosive Beanspruchun­gen, denen er ausgesetzt war, und es enthält Informatio­nen über die Abmessungen, die seine konstruktive Ausle­gung widerspiegeln sowie über die Art und Qualität der Fertigungsverfahren. Die Bauteil-Schadensanalyse nutzt die Methoden der Metallographie einschließlich elektro­nenmikroskopischer und mikroanalytischer Verfahren in Verbindung mit weiteren metallkundlichen Untersuchungs­methoden einschließlich der Werkstoffprüfung. Da Werk­stoffinstitute meist über die entsprechenden Prüfapparatu­ren und die Kompetenz der Untersuchungsmethodik verfü­gen, ist die Schadensanalyse oft dort angesiedelt.

    https://www.wp.rub.de/

  • 5th Ruhr-Symposium: Functional Materials for Additive Manufacturing

    Julia Reinermann, CENIDE - Center for Nanointegration Duisburg-Essen
    10th. October 2018, Symposium, Campus Duisburg, Fraunhofer-inHaus-Zentrum, Duisburg, Universität Duisburg-Essen

    Time:
    Start: 10th. October 2018 08:30 a.m.
    End: 10th. October 2018 04:30 p.m.

    The Nano-research center NETZ/CENIDE of the University of Duisburg-Essen, together with the CAR-Center Automotive Research and D+S Automotive, organizes the annual RUHR Symposium.
    This year the focus is on laser-based technologies in additive production and new and optimized materials. renowned scientists and high-ranking industrial managers meet to exchange ideas on polymers, metals, composites and processing. Exciting contributions and discussions await you, among others with the following speakers:

    • Marcus Schäfer, Board Member Mercedes-Benz Cars, Production & SupplyChain Management, Daimler AG
    • Frank Götzke, Head of New Technologies, Bugatti Engineering GmbHDr. Ulrich Küsthardt, CIO,Evonik AG
    • Carl Fruth, Managing Director of Sintermask GmbH, FIT AG
    • Prof. Dr. Reinhart Poprawe, Member of the Presidium of the Fraunhofer-Gesellschaft
    • Tobias A. Schaedler, Head of Additive Manufacturing, HRL Laboratories (of Boeing & General Motors), Santa Barbara

    http://www.ruhr-symposium.de/

  • WGP Seminar Prozess-, Werkzeug- und Maschinenanalyse

    Prof. Dr.-Ing. Dirk Biermann , Institut für Spanende Fertigung, TU Dortmund
    9th. October 2018, Seminar, Institut für spanende Fertigung Technische Universität Dortmund Baroper Str. 303, Campus Süd 44227 Dortmund

    Time:
    Start: 9th. October 2018 08:30 a.m.
    End: 10th. October 2018 06:30 p.m.

    Das Ergebnis spanender Produktionsprozesse wird anhand zahlreicher Faktoren bewertet. Dazu zählen insbesondere die Oberflächengüte, das Randzonengefüge und die Form- und Lagetoleranzen auf Seiten des Werkstückes, sowie der Verschleiß und die daraus resultierende Standzeit auf Seiten des Werkzeuges. Die benannten Faktoren stehen in Abhängigkeit zueinander und definieren in einem komplexen Zusammenspiel die Güte des Prozesses. Zur Bestimmung dieser Einflussgrößen bedarf es neben der notwendigen Messtechnik Kenntnisse im Umgang mit selbiger. Fundiertes Wissen über die Messung der jeweiligen Prozesskenngrößen hilft, Fehler bei der Erfassung zu verhindern. In diesem Seminar sollen generelle Kenntnisse zur Anwendung der wesentlichen Messverfahren und Messtechniken für die werkstück- und werkzeugseitige Analyse vermittelt werden. Dazu zählen Kraft- und Temperaturmessungen, Schwingungsanalysen und Verschleißmessungen der Werkzeuge. Auf Basis der gewonnenen Erkenntnisse soll mit Hilfe dieses Seminars eine Sensibilisierung für aktuelle prozess- und bauteilspezifische Auswertemethoden erfolgen, um den Einsatz von Messtechnik in der Fertigung moderner Industrieunternehmen zu erhöhen und somit die Fertigungsqualität und die wirtschaftliche Bearbeitung zu verbessern.

    http://www.isf.de/wgp_do2/

  • Towards an atomistic description of the material response of glasses across all time-scales with Non-Affine Lattice Dynamics (NALD)

    Alessio Zaccone, University of Cambridge, Cambridge, UK
    1st. October 2018, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, room IC 02-718

    Time:
    Start: 1st. October 2018 10:00 a.m.
    End: 1st. October 2018 11:00 a.m.

    The material response of glasses is a topic of fundamental relevance in condensed matter physics, and also has plenty of applications in materials science and engineering. At present there is no theory which can describe the response of glasses below the glass transition temperature. We recently developed a new approach, called Non-affine Lattice Dynamics (NALD), to the linear response of glasses from first principles. Starting from a particle-bath Hamiltonian we derive a Generalized Langevin equation of motion for nonaffine atomic displacements under an external field [1-3]. This leads directly to expressions for the complex moduli (for e.g. viscoelastic or dielectric response) which involve the vibrational density of states (DOS) of the glass, together with a memory kernel for the friction. NALD has been shown to provide parameter-free predictions of viscoelastic moduli of polymer glasses in excellent agreement with numerical simulations at temperatures below and even slightly above Tg, provided that non-propagating instantaneous normal modes (INMs) are included in the DOS, which allows us to account for anharmonic effects [2]. NALD is currently being developed into atomic-scale calculations of real materials with the aim of providing parameter-free predictions of mechanical response across all time-scales/frequencies, thus solving the problem of ab-initio and atomistic approaches which are valid only at extremely high deformation rates/frequencies. Finally I will briefly review recent results about nonlinear response of metallic glasses [4], the origin of shear banding from alignment of Eshelby-like quadrupoles in metallic glasses [5] and a new theory of crystal nucleation in shear flows [6].

    References:
    [1] B. Cui, R. Milkus, and A. Zaccone. Direct link between boson-peak modes and dielectric alpha-relaxation in glasses. Physical Review E 95, 022603 (2017).
    [2] B Cui, J. Yang, J. Qiao, M. Jiang, L. Dai, Y.-J. Wang, A. Zaccone. Atomic theory of viscoelastic response and memory effects in metallic glasses. Physical Review B 96, 094203 (2017).
    [3] V.V. Palyulin, C. Ness, R. Milkus, R. M. Elder, T.W. Sirk, A. Zaccone. Parameter-free predictions of the viscoelastic response of glassy polymers from non-affine lattice dynamics. Soft Matter, DOI: 10.1039/c8sm01468j.
    [4] A. Zaccone, P. Schall, E.M. Terentjev. Microscopic origin of nonlinear nonaffine deformation in bulk metallic glasses. Phys. Rev. B 90, 140203(R) (2014).
    [5] V. Hieronymus-Schmidt, H. Roesner, G. Wilde, A. Zaccone. Shear banding in metallic glasses described by alignments of Eshelby quadrupoles. Phys. Rev. B 95, 134111 (2017).
    [6] F. Mura and A. Zaccone. Effects of shear flow on phase nucleation and crystallization. Phys. Rev. E 93, 042803 (2016).

    http://www.icams.de/content/events/

  • SEPTEMBER 2018
  • WissensNacht Ruhr: Eine Nacht zum Sehen, Staunen und Erleben

    28th. September 2018, Tag der offenen Tür, NETZ, Carl-Benz-Str. 199, 47057 Duisburg

    Time:
    Start: 28th. September 2018 04:00 p.m.
    End: 28th. September 2018 10:00 p.m.

    Es ist noch ein wenig hin, aber jetzt steht es fest: Am 28. September 2018 heißt es wieder: Aufbleiben lohnt sich. Denn die Metropole Ruhr wird erneut zu einem faszinierenden und außergewöhnlichen Zentrum der Wissenschaft. Über 400 Wissenschaftlerinnen und Wissenschaftler aus 120 Institutionen nahmen bei der ersten WissensNacht Ruhr rund 8.000 Besucher mit auf eine nächtliche Forschungsreise durch die Wissenslandschaft Ruhr. Vor allem Familien mit Kindern erlebten das Ruhrgebiet als „Living Lab“ – mit spannenden Experimenten, Mitmachaktionen und vielen Begegnungen mit den engagierten Akteuren der Wissensmetropole Ruhr. Im Jahr 2016 kamen 11.000 wissensdurstige Besucherinnen und Besucher und konnten die Wissenschaft in ihrer ganzen Vielfalt erleben. Alle Themen und Inhalte wurden bei der „Entdeckertour 2016“ präsentiert.

    http://cenide.de

  • 3rd International Symposium

    25th. September 2018, Symposium, NETZ, Carl-Benz-Str. 199, 47057 Duisburg

    Time:
    Start: 25th. September 2018 00:00
    End: 26th. September 2018 00:00

    Gas-phase Synthesis of Functional Nanomaterials: Fundamental Understanding, Modeling and Simulation, Scale-up and Application This international symposium is organized by the DFG Priority Program SPP1980 Nanoparticle Synthesis in Spray Flames SpraySyn and the DFG Research Unit (FOR 2284 Model-based scalable gas-phase synthesis of complex nanoparticles.

    https://www.uni-due.de/cenide/symposium_synthesis_2018.php

  • 10th International Conference on Screw Machines (ICSM2018)

    18th. September 2018, Konferenz, Chair of Fluidics Faculty of Mechanical Engineering TU Dortmund University Leonhard-Euler-Str. 5 44227 Dortmund

    Time:
    Start: 18th. September 2018 09:00 a.m.
    End: 19th. September 2018 05:30 p.m.

    Ladies and Gentlemen, We are pleased to announce that the 10th International Conference on Screw Machines (ICSM2018) will be held at TU Dortmund University in September, 2018. Since 1984, the Screw Machines Conference has highlighted progress in research and development in the design, development and application of all types of screw machines and the products in which they are used. All who are involved in research, development, manufacture, service, and operation are invited to exchange ideas and opinions at this forum. Whether you choose to be an author or a guest at ICSM2018, I will be happy to welcome you at TU Dortmund University next fall. To gain an impression, some observations and thoughts on the value of the Screw Machines conference series are available here. On behalf of the programme committee, Andreas Brümmer Chair of Fluidics TU Dortmund University

    http://www.ft.mb.tu-dortmund.de/cms/ICSM2018/en/home/

  • Ab-initio theory of pair- and multi-local moment interactions: The magnetism of Mn3A from fluctuating local moments

    Dr. Eduardo Mendive-Tapia, University of Warwick, UK
    14th. September 2018, Theoriekolloquium, MC 351, University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 14th. September 2018 12:00
    End: 14th. September 2018 02:00 p.m.

    To describe magnetic order in metals it is essential to carefully account for the itinerant electrons. These itinerant electrons form a spin-polarized 'glue' which binds together the nuclei and can lead to the emergence of local magnetic moments. This glue is complicated and might qualitatively change when it adapts to the type and extent of magnetic order. Crucially, it determines the motion of the local moments and mediates the interactions between them. Given the complexity of the glue it is therefore unsurprising that in metallic materials the interactions between local moments must be described not only by simple pairwise terms, but also with terms describing multi-site magnetic interactions. Here, we present a Disordered Local Moment (DLM) theory to calculate both pairwise and multilocal moment interactions via modelling the local moment thermal fluctuations and using magnetically constrained Density Functional Theory (DFT) calculations. The theory describes first- and second-order magnetic phase transitions and provides the material's free energy and magnetic ordering as functions of temperature, magnetic field, lattice parameters and atomic positions. The theory is applied to study the geometrically frustrated magnetism of Mn3A in all its hexagonal, cubic and tetragonal structures. The results are in excellent agreement with experiment. For example, we predict the stabilization of both triangular antiferromagnetic (AFM) and ferrimagnetic phases with right transition temperatures. We also reproduce the pressure-temperature experimental phase diagram of Mn3Pt, adequately describing the AFM-AFM transition, consequent tricritical points and potential for barocaloric applications.

  • 50 Jahre Institut für Werkstoffe

    13th. September 2018, Kolloquium, Gastronomie im Stadtpark, Bochum

    Time:
    Start: 13th. September 2018 09:00 a.m.
    End: 14th. September 2018 04:00 p.m.

    http://www.iw.rub.de/allgemeines/aktuelles.php#4

  • DGM-Fortbildung: Einführung in die mechanische Werkstoffprüfung

    Prof. Dr.-Ing. Frank Walther, Fachgebiet Werkstoffprüftechnik (WPT), TU Dortmund
    12th. September 2018, Fortbildungsseminar, Fachgebiet Werkstoff-prüftechnik (WPT) Maschinenbau 3 Baroper Str. 303 44227 Dortmund

    Time:
    Start: 12th. September 2018 09:00 a.m.
    End: 13th. September 2018 06:30 p.m.

    Zur Charakterisierung der mechanischen Eigenschaften von Konstruktionswerkstoffen sind u. a. die Prüfverfahren Zugversuch, Kerbschlagbiegeversuch und Härteprüfung grundlegend wichtige und häufig eingesetzte Methoden für die Qualitätskontrolle und -sicherung sowie die Werkstoffentwicklung und -optimierung. Diese Verfahren werden theoretisch und praktisch behandelt, wobei sich die Fortbildung in erster Linie an Personen richtet, die in Betrieben der Metallherstellung und -verarbeitung im Rahmen der Eingangs-, Zwischen- und Endkontrolle die (zerstörende) mechanische Werkstoffprüfung durchführen oder betreuen, oder dies zukünftig zur Aufgabe haben. Angesprochen werden primär Personen, die in der Werkstoffprüfung nicht ausgebildet sind oder die früher erworbenen Kenntnisse auffrischen und vervollständigen wollen. Damit schließt die Fortbildung eine durch den Wegfall von Ausbildungsplätzen für Werkstoffprüfer/-innen entstandene Lücke in der Qualifizierung für eine Tätigkeit in mechanischen Werkstoffprüflaboren.

    https://www.dgm.de/index.php?id=1501

  • 7. DORP 2018 – Dortmunder Kolloquium zur Rohr- und Profil-umformung

    Prof. Dr.-Ing. Dr.-Ing. E.h. A. Erman Tekkaya, Institut für Umformtechnik, und Leichtbau Technische Universität Dortmund
    11th. September 2018, Tagung, TU Dortmund Campus Süd Maschinenbau III Hörsaal E.001 Baroper Str. 303 44227 Dortmund Einfahrt 41

    Time:
    Start: 11th. September 2018 00:00
    End: 12th. September 2018 00:00

    Vom 11.09.2018 bis zum 12.09.2018 findet bereits zum siebten Mal das Dortmunder Kolloquium zur Rohr- und Profilumformung, kurz „DORP“ statt. Die Tagungsthemen werden am 12.09.2018 in den Räumlichkeiten des IUL präsentiert. Das Themenportfolio umfasst innovative Berichte von Anwender, Maschinenhersteller und Wissenschaftler/-innen. In den letzten Jahren hat dieser bereichsübergreifende Informationstransfer dazu beigetragen, dass das DORP zu einer bewährten Plattform für den Erfahrungs- und Meinungsaustausch zwischen der Industrie und der Wissenschaft wurde. Das DORP 2018 bietet den Teilnehmer/-innen wieder interessante Vorträge, anregende Diskussionen und eine intensive Gesprächskultur aus dem Expertenspektrum von Industrie und Wissenschaft. Wir laden Sie herzlich zum DORP 2018 ein und freuen uns darauf, Sie hier bei uns in Dortmund begrüßen zu dürfen.

    https://www.iul.eu/veranstaltungen/dorp18/

  • CENIDE Science Talk

    Prof. Dr. David Y.H. Pui, University of Minnesota, USA, Dr. Christof Asbach, Institut für Energie- und Umwelttechnik (IUTA) e. V.
    10th. September 2018, Vortrag, NETZ, Seminarraum 2.42, Carl-Benz-Str. 199, 47057 Duisburg

    Time:
    Start: 10th. September 2018 01:15 p.m.
    End: 10th. September 2018 03:15 p.m.

    "Green Technologies for Sustainable Environment" Prof. Dr. David Y.H. Pui --- "Aerosol Science in Times of Digitalization" Dr. Christof Asbach

    http://cenide.de

  • CRC 1242 International Conference 2018: Non-Equilibrium Dynamics of Condensed Matter in the Time Domain

    3rd. September 2018, Conference, Rolduc Abbey, Kerkrade, The Netherlands

    Time:
    Start: 3rd. September 2018 00:00
    End: 6th. September 2018 00:00

    Abbey Rolduc, September 3-6, 2018

    Organized by the CRC 1242 and funded by the Deutsche Forschungsgemeinschaft

    The conference will be a forum for presentation and discussion of recent experimental and theoretical developments in the field of non-equilibrium dynamics excited by external stimuli such as light, ion, or electrical field pulses. We welcome abstracts for your contributions as well as from your coworkers and/or students.

    Beugungsbild schmal

    © CRC 1242

    Scope

    This conference provides a podium to present and to discuss recent results of experimental and theoretical work on non-equilibrium dynamic processes in condensed matter. In particular, we are interested in processes which are triggered by impulsive external stimuli such as pressure, particle, or electromagnetic field pulses. Thereby, the meeting aims to contribute to the development of a comprehensive understanding of non-equilibrium lattice and electron dynamics in real materials, including those with reduced dimensionality.

    https://www.uni-due.de/sfb1242/rolduc.php

  • AUGUST 2018
  • CENIDE Science Talk

    Prof. Dr. Orlando Rojas, Aalto University, Finland, Prof. Dr. Jochen Gutmann, Universität Duisburg-Essen
    29th. August 2018, Vortrag, S07 S00 D0, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 29th. August 2018 11:15 a.m.
    End: 29th. August 2018 01:15 p.m.

    "Biobased polymers: material bank for the development of structure, color and function" Prof. Dr. Orlando Rojas --- "Natural polymers for surface modification and reinforcement" Prof. Dr. Jochen Gutmann

    http://cenide.de

  • JULY 2018
  • Mesoscale mechanics of energetic materials: a coordinated experiment-theory effort using new in situ probes

    Kyle Ramos, Los Alamos National Laboratory, USA
    19th. July 2018, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC-02/718

    Time:
    Start: 19th. July 2018 01:30 p.m.
    End: 19th. July 2018 02:30 p.m.

    Weak impacts on high explosives (HE) can give rise to either violent reactions or harmless fracture and material dispersal. Predicting this response or the state of damage in the material remains an unsolved technical challenge. In situ mesoscale insights to anisotropic dislocation-mediated plasticity, phase transitions, and damage are needed to quantify fundamental structure-property relationships, inform theory, and enable high fidelity simulations.1 We have attempted such an effort and will present an overview of our progress so far.

    Further details can be found in the attached document

    http://www.icams.de/content/events/?detail=2191

  • Diffusion through Nanochannels

    Dr. Rakesh Joshi , University of New South Wales Sydney
    18th. July 2018, Kolloquium, MC 122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 18th. July 2018 01:00 p.m.
    End: 18th. July 2018 03:00 p.m.

    Diffusion is movement of ions or molecules from an area of high concentration/higher pressure to an area of low concentration/lower pressure. Diffusion depends on molecular size, pore size or channel width, temperature, pressure, concentration and on the structure and density of pores or channels for mass transport. In some cases, specially for the layered materials the interlayer spacing is the path of mass transport and it can be tuned as required. These structures offer interesting diffusion mechanism. Direct application of diffusion through these nanochannels can be in desalination, water purification and gas separation.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • The effects of nanoparticles on structural and permeation properties of polymeric membranes

    Prof. Dr. Majid Pakizeh, Ferdowsi University of Mashhad, Iran
    16th. July 2018, Technisch-Chemisches Kolloquium, Raum S05 T00 B71, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 16th. July 2018 03:00 p.m.
    End: 16th. July 2018 04:45 p.m.

    Thin film nanocomposite (TFN) membranes are a new form of membranes; nanoparticles are incorporated into thin film composite (TFC) membranes to improve membrane properties and performance. In this presentation, the results of several experimental studies are summarized and presented. Preparation of different TFN membranes, including metal organic framework (MOF; UiO-66-NH2) / polyamide (PA), MOF (MIL-101) / Pebax, zeolite (UZM-5) / PA, SiO2-NH2 / PA, nanoclay / polyvinyl alcohol and TiO2 nanotube / Pebax are discussed.

    http://pakizeh.profcms.um.ac.ir/

  • From electrons to microstructure

    Matous Mrovec, ICAMS, Ruhr-Universität Bochum
    12th. July 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04/410

    Time:
    Start: 12th. July 2018 04:00 p.m.
    End: 12th. July 2018 05:25 p.m.

    http://www.icams.de/content/events/

  • Computer simulations of materials: insight about different scales

    Andreas Heuer, Universität Münster
    5th. July 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04/410

    Time:
    Start: 5th. July 2018 04:00 p.m.
    End: 5th. July 2018 05:30 p.m.

    http://www.icams.de/content/events/

  • Massenspektrometrische Metabolomanalysen in der medizinischen Forschung

    Prof. Dr. Bernd Kammerer, Uni-Freiburg
    2nd. July 2018, Vortrag, S05 T02 B02, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 2nd. July 2018 04:00 p.m.
    End: 2nd. July 2018 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_analytisch_chemisches_kolloquium.shtml

  • JUNE 2018
  • Splines for Discrete Crack Propagation in a Fluid-Saturated Porous Medium

    Prof. Dr. René de Borst, University of Sheffield, UK
    29th. June 2018, Talk, Ruhr-Universität Bochum building IC room 03/604

    Time:
    Start: 29th. June 2018 11:00 a.m.
    End: 29th. June 2018 01:00 p.m.

    Prof. Dr.ir.Dr.h.c. René de Borst form the University of Sheffield, UK, will hold a guest lecture in the framework of SFB 837 about 'Splines for Discrete Crack Propagation in a Fluid-Saturated Porous Medium'. Recently, isogeometric analysis has also been used for the analysis of crack propagation, also for discrete approaches. An elegant approach is to exploit the flexibility of NURBS (and T-splines) in increasing or lowering the order of continuity, which can be carried out in the parameter domain. While this facilitates the introduction of discontinuities, it puts some restrictions on the direction of crack propagation. Apart from isogeometric interface elements, Powell–Sabin B-splines have been investigated to model discrete crack propagation. Different from NURBS and T-splines, this spline technology is based on triangles. Another difference is that the crack is now directly introduced in the physical domain. Since triangles and Bézier extraction are used, re-meshing is straightforward, and standard algorithms can be used for this purpose. Different from smeared approaches, discrete crack modelling allows for the straightforward description of mass transport in cracks, as for instance occurs in a fluid-saturated porous medium. A multiscale model is derived. The resulting two-scale model imposes some requirements on the interpolation of the displacement and the pressure fields, which can be satisfied elegantly using spline basis functions.

    http://www.sd.rub.de/de/Aktuelles.html

  • 10 Years ICAMS - International Symposium

    25th. June 2018, Conference, Veranstaltungszentrum, Ruhr-Universität Bochum

    Time:
    Start: 25th. June 2018 09:00 a.m.
    End: 27th. June 2018 04:00 p.m.

    The Interdisciplinary Centre for Advanced Materials Simulation (ICAMS) was launched in 2008 with the aim of advancing multiscale materials modelling from electrons to engineering materials.
    Modelling and simulation contribute to predicting the behaviour of materials and facilitating the design of materials with specific properties. This requires a multiscale materials modelling framework that is based on the fundamental laws of nature and links the electronic modelling hierarchy through the atomistic and mesoscale modelling regimes to macroscopic materials behaviour.
    On the occasion of the 10th anniversary of ICAMS, an International Symposium will summarize recent developments and advances in the field of materials modelling in a three-day meeting from June 25 to 27, 2018 at Ruhr-Universität Bochum, Germany.

    http://icams10.rub.de/

  • Anorganische Chemie - Quo Vadis?

    Prof. Dr. Stephan Schulz, Universität Duisburg-Essen
    27th. June 2018, Vortrag, MD 162, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 27th. June 2018 07:30 p.m.
    End: 27th. June 2018 09:15 p.m.

    Zu den größten Herausforderungen des kommenden Jahrzehnts gehört zweifelsfrei die Gestaltung der Energiewende und die Entwicklung smarter Lösungen für die alternative Energieerzeugung und Energiespeicherung. Zur Lösung dieser gesellschaftsrelevanten Fragestellungen, die zur Aufrechterhaltung des derzeitigen Lebensstandards nicht nur in Deutschland unabdingbar ist, kann die Anorganische Chemie als wichtige Teildisziplin der Chemie einen zentralen Beitrag liefern, da die Lösung grundsätzlicher "anorganischer" Fragestellungen für die Weiterentwicklung einer Vielzahl technologischer Anwendungen von grundlegender Bedeutung ist. So erfordert die Verknappung fossiler Energiereserven in den kommenden Jahren eine Weiterentwicklung oder sogar Umstellung etablierter chemischer Prozesse, und auch die sich bereits heute in stark steigenden Preisen ausdrückende Resourcenverknappung, die insbesondere für eine Vielzahl von Metallen zu beobachten ist, ist in diesem Zusammenhang von Bedeutung.

    Im Rahmen des Vortrags wird Prof. Schulz ausgewählte Forschungsbereiche vorstellen, die eine grundlegende Expertise der Anorganischen Chemie erfordern. Er spannt dabei den Bogen von der Herstellung bioabbaubarer Polymere über die Synthese und Speicherung chemischer Verbindungen als Energieträger bis hin zur Entwicklung von Materialien für die Energiewandlung.

  • Mechanical devices for quantum state engineering and quantum-enhanced sensing

    Dr. Witlef Wieczorek, Chalmers University of Technolofy, Sweden
    27th. June 2018, Kolloquium, MC 122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 27th. June 2018 01:00 p.m.
    End: 27th. June 2018 03:00 p.m.

    Recent experiments have demonstrated the control over micro- and nanomechanical resonators in the quantum regime. These achievements pave the way for engineering mechanical devices for quantum technologies, such as for quantum-enhanced sensing or for transducing between single microwave and optical photons. Furthermore, mechanical devices controlled in the quantum regime may open up a path for testing quantum physics with massive objects. 

    Cavity optomechanical devices are a leading experimental platform for quantum control of mechanical motion. Such devices exploit the interaction between mechanical motion and light fields in a cavity. However, the state of the mechanical resonator can only be inferred indirectly from measurements on the light field. In my talk I will present a scheme, which gives an optimal estimate for the complete state of a cavityoptomechanical system, including the mechanical resonator. This scheme relies an Kalman filtering and is illustrated for the case of a micromechanical cantilever that is coupled to a high-Finesse optical cavity. Further, I will present a completely different approach of controlling mechanical motion that employs superconducting levitation: A magnetically levitated micrometer-sized object takes the role of a mechanical resonator. This experimental platform offers unrivaled low mechanical dissipation, which offers new prospects in quantum-enhanced sensing. I will describe first experimental steps in this direction.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Inspired by Natural Products: from Total Synthesis to the Design of Catalysts, Hydrogels and Liquid Crystals

    Prof. Dr. Sabine Laschat, Universität Stuttgart
    25th. June 2018, Kolloquium, S05 T02 B02, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 25th. June 2018 11:15 a.m.
    End: 25th. June 2018 12:30

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • Tailoring microstructures and properties by additive manufacturing

    Thomas Niendorf, Universität Kassel, Germany
    21st. June 2018, ICAMS-IfM Seminar, Ruhr Universität Bochum, IC 04/410

    Time:
    Start: 21st. June 2018 04:00 p.m.
    End: 21st. June 2018 05:30 p.m.

    http://www.icams.de/content/events/

  • Valuation of a complex financial transaction

    Dr. Mark Beinker, d-fine GmbH, Frankurt am Main
    15th. June 2018, Theoriekolloquium, MC 351, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 15th. June 2018 12:00
    End: 15th. June 2018 01:30 p.m.

    A walk-through case study of an actual project demonstrating how financial mathematics is applied to real-life problems. Often, different risk classes can mix in an inseparable way together, requiring to build bigger models. Parameter estimation and calibration of these models is a challenging task in itself, further complicated by the common lack of data problem. The purpose of this talk is to give some insight, how these problems can be dealt with in practice.

  • High throughput with particle technology

    Lutz Mädler, Universität Bremen
    14th. June 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04/410

    Time:
    Start: 14th. June 2018 03:00 p.m.
    End: 14th. June 2018 05:30

    http://www.icams.de/content/events/

  • Dynamical Quantum Typicality: Concept and Applications

    Prof. Dr. Robin Steinigeweg , Universität Osnabrück
    12th. June 2018, Colloquium, MG 272, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 12th. June 2018 10:00 a.m.
    End: 12th. June 2018 11:45 a.m.

    The concept of typicality states that a single pure state can have the same properties as the full statistical ensemble. This concept is not restricted to specific states and applies to the overwhelming majority of all possible states, drawn at random from a high-dimensional Hilbert space. In the cleanest realization, even a single eigenstate of the Hamiltonian may feature the properties of the full equilibrium density matrix, assumed in the well-known eigenstate thermalization hypothesis. The notion of property is manifold in this context and also refers to the expectation values of observables. Remarkably, typicality is not only a static concept and includes the dynamics of expectation values. Recently, it has become clear that typicality even provides the basis for powerful numerical approaches to the dynamics and thermalization of many-body quantum systems at nonzero temperatures. These approaches are in the center of my talk. 

    I demonstrate that typicality allows for significant progress in the study of real-time relaxation. To this end, I review numerical work [1-3] on correlation functions of integrable systems. A comprehensive comparison with state-of-the-art methods verifies that typicality is satisfied in finite systems over a wide range of temperature. Moreover, without the restriction to small systems or short times, typicality sheds light on several long-standing questions. As important examples, I discuss the existence of current relaxation [1] and the emergence of diffusion [2,3] in isolated systems. 

    References:

    [1] R. Steinigeweg, J. Gemmer, and W. Brenig, PRL 112, 120601 (2014); PRB 91, 104404 (2015).
    [2] R. Steinigeweg, F. Jin, D. Schmidtke, H. De Raedt, K. Michielsen, and J. Gemmer, PRB 95, 035155 (2017).
    [3] R. Steinigeweg, F. Jin, H. De Raedt, K. Michielsen, and J. Gemmer, PRE(R) 96, 020105 (2017).

    https://www.uni-due.de/sfb1242/colloquium.php

  • Pharmaceutical residues as emerging organic micropollutants in the aquatic environment: chemical trace analysis and advanced removal techniques

    Prof. Dr. Kristof Demeestere, U Gent
    11th. June 2018, Vortrag, S05 T02 B02, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 11th. June 2018 04:00 p.m.
    End: 11th. June 2018 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_analytisch_chemisches_kolloquium.shtml

  • Ideal thermoelectrics for ideal solar cells

    Prof. Dr. Heiner Linke, NanoLund, Lund University, Schweden
    6th. June 2018, Kolloquium, MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 6th. June 2018 12:45
    End: 6th. June 2018 02:15 p.m.

    One of the key losses in conventional solar cells is due to the thermalization of photogenerated carriers, resulting in waste heat. Hot-carrier solar cells seek to harvest this extra energy resource by extracting carriers before they cool to the ambient temperature. Here we point out that the problem of harvesting this energy is essentially that of thermal-to-electric energy conversion. We recently demonstrated, in devices based on single nanowires, that thermoelectric energy conversion can be performed near the ideal, thermodynamic limits [1,2]. Marrying the two approaches in nanowires [3,4] offers an exciting new direction towards efficient solar-to-electric energy conversion.

    [1] Humphrey, T. E., Newbury, R., Taylor, R. P., & Linke, H. (2002). Reversible Quantum Brownian Heat Engines for Electrons. Physical Review Letters, 89(11), 116801. http://doi.org/10.1103/PhysRevLett.89.116801

    [2] Martin Josefsson, Artis Svilans, Adam M. Burke, Eric A. Hoffmann, Sofia Fahlvik, Claes Thelander, Martin Leijnse, Heine Linke: A quantum-dot heat engine operated close to thermodynamic efficiency limits. arXiv:1710.00742 (submitted)

    [3] Limpert, S., Bremner, S., & Linke, H. (2015). Reversible electron–hole separation in a hot carrier solar cell. New Journal of Physics, 17(9), 1–11

    [4] Limpert, S., Burke, A., Chen, I.-J., Anttu, N., Lehmann, S., Fahlvik, S., et al. (2017). Single-nanowire, low-bandgap hot carrier solar cells with tunable open-circuit voltage. Nanotechnology, 28(43), 434001

  • Droplet Generation for Cell Analysis on Microfluidics and Mass Spectrometry

    Prof. Dr. Jin-Ming Lin, Tsinghua University, China
    1st. June 2018, Vortrag, S05 T02 B02, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 1st. June 2018 09:00 a.m.
    End: 1st. June 2018 11:00 a.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_analytisch_chemisches_kolloquium.shtml

  • MAY 2018
  • Functional Nanostructures Made By Molecular Design

    Dr. Florian Beuerle, Universität Würzburg
    28th. May 2018, Kolloquium, Raum S05 T02 B02, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 28th. May 2018 11:15 a.m.
    End: 28th. May 2018 12:30

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • Advancements in Compound-specific Isotope Analysis (CSIA): Perspectives for Studying Reaction Mechanisms in Complex Systems

    Prof. Dr. Martin Elsner, TU München
    28th. May 2018, Vortrag, S05 T02 B02, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 28th. May 2018 04:00 p.m.
    End: 28th. May 2018 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_analytisch_chemisches_kolloquium.shtml

  • Momentum-space topology of graphite: Dirac lines, exotic fermions, and flat bands

    Prof. Dr. Tero Heikkilä, University of Jyväskylä
    18th. May 2018, Theoriekolloquium, MC 351, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 18th. May 2018 12:00
    End: 18th. May 2018 01:30 p.m.

    By now the Dirac point in graphene and perhaps also its topological properties are a well-known concept for most condensed-matter physicists. Topology of graphite is less well known, but exhibits a rich set of different momentum-space topological structures: type A and B Dirac lines, type I and II Dirac lines, and nexus fermions with a topologically protected three-fold degeneracy point. In my talk, I will explain these concepts and use the almost flat drumhead surface states as a stepping stone for the next step: studies of mean-field models of interacting states of matter.

  • Micropatterned adhesive surfaces – from bioinspiration to robotics

    Prof. Dr. Eduard Arzt, Leibniz-Institut für Neue Materialien
    16th. May 2018, Kolloquium, Raum MC 122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 16th. May 2018 01:00 p.m.
    End: 16th. May 2018 03:00 p.m.

    3D micropatterning of surfaces signifies a recent paradigm shift for control of surface functionalities: the exploitation of judiciously designed surface protrusions, “fibrils” and other features at the micron scale. Inspired by natural examples, such as in insects, spiders and geckos, several groups have fabricated surfaces with interesting adhesive properties derived from micropatterning. This talk will give an overview of our novel adhesive surfaces with special emphasis on mechanisms and modeling. We were among the first to identify the governing principle of „contact splitting“, i.e. the gain in intermolecular adhesion due to a multitude of fine fibrillar contacts instead of one monolithic contact region. We have demonstrated that a switching action to a nonadhesive state can be reproducibly achieved, for example, by inducing bending and Euler buckling in the fibrils. An important element of our work is the numerical simulation of the adhesion performance as a function of materials and structure parameters, which has allowed us to rationally optimize our structures for particular applications. Even surfaces with finite roughness are now accessible for our newly designed microstructures. These properties make artificial “gecko surfaces” interesting for creating new surface solutions for robotic pick-and-place systems, assembly machines, in space technology and in biomedicine.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Fluorine promoted synthesis of 19F/18F-perfluorinated motifs

    Dr. Matthew Tredwell, Max-Planck-Institut Mülheim
    14th. May 2018, Kolloquium, Raum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 14th. May 2018 11:15 a.m.
    End: 14th. May 2018 12:30

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • Überraschungen mit Schwefelsäure - Neue Chemie mit einer alten Substanz

    Prof. Dr. Mathias Wickleder, Universität Köln
    14th. May 2018, Vortrag, S03 V00 E71,Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 14th. May 2018 05:15 p.m.
    End: 14th. May 2018 11:45 p.m.

  • Coherent ultrafast hot electron generation at plasmonic heterojunctions

    Prof. Dr. Hrvoje Petek, Department of Physics and Astronomy, University of Pittsburgh
    2nd. May 2018, Kolloquium, Saal MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 2nd. May 2018 12:45
    End: 2nd. May 2018 02:15 p.m.

    We study the plasmonic enhancement of hot electron generation, by measuring the ultrafast electron spectroscopy and dynamics at Ag nanocluster-decorated graphite and TiO2 surfaces by timeresolved multiphoton photoemission (mPP) spectroscopy. Deposition of Ag onto the supporting substrates produces small (5 nm dia., 1 nm high) Ag nanoparticles that support Mie plasmon resonances of the metal nanoparticle-support system. Excitation of the plasmonic modes greatly enhances the mPP yields over the bare substrates. Analysis of the mPP spectra and hot electron relaxation rates show that hot electrons are generated directly in the substrates by dephasing of the plasmon resonances. This is possible because the plasmon resonances are electronically, optically, and chemically coupled with the substrates. The coupling of molecules with the plasmonic modes causes modification of the plasmon resonances and the mPP yields. We also find direct coherent photoinduced electron transfer from Ag nanoclusters to graphite. The probing of ultrafast polarization and hot electron dynamics reveals the energy and charge coupling at plasmonic heterojunctions.1

  • APRIL 2018
  • CENIDE Science Talk: Advantages of crosslinkable organic semiconductors

    Klaus Meerholz, University of Cologne, Doru Lupascu, University of Duisburg-Essen
    27th. April 2018, Science Talk, ZBT Duisburg, University of Duisburg-Essen

    Time:
    Start: 27th. April 2018 11:15 a.m.
    End: 27th. April 2018 00:00

    We welcome the guest speaker Prof. Dr. Klaus Meerholz from the Department of Physical Chemistry at the Science Talk on Friday, April 27, 11.15 a.m. at the University of Cologne. Afterwards Prof. Dr. Doru C. Lupascu from the Institute of Materials Science at the University of Duisburg-Essen (UDE) will speak. While Prof. Meerholz will focus on crosslinkable organic semiconductors in his lecture, Prof. Lupascu will focus on dielectric effects in perovskites.

  • Live imaging of celular behavior in a medaka fish osteoporosis model: Modulation of osteoclast behavior by small compounds

    Prof. Dr. Christoph Winkler, National University of Singapore
    24th. April 2018, Vortrag, Raum S07 S02 D48, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 24th. April 2018 10:15 a.m.
    End: 24th. April 2018 11:45 a.m.

  • Small, functional rotaxanes

    Prof. Dr. Stephen Goldup, University of Southhampton, England
    23rd. April 2018, Kolloquium, Raum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 23rd. April 2018 11:15 a.m.
    End: 23rd. April 2018 12:30

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • Aktuelle Herausforderungen für die Prozessanalytik – von der Online-NMR-Spektroskopie im Feld bis zum Plasmaspektrometer auf dem Acker

    Dr. Michael Maiwald, BAM Berlin
    23rd. April 2018, Vortrag, Seminarraum S05 T02 B02, Universitätsstr.2, 45141 Essen

    Time:
    Start: 23rd. April 2018 04:00 p.m.
    End: 23rd. April 2018 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_analytisch_chemisches_kolloquium.shtml

  • Materials Design in Practice: Atomistic Simulations in Science and Industry

    PD Dr. Volker Eyert, Materials Design SARL, Montrouge
    20th. April 2018, Kolloquium, MC 351, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 20th. April 2018 12:00
    End: 20th. April 2018 01:30 p.m.

    During the past decades, atomic-scale simulations have emerged as a tool of materials research and engineering both in academia and industry. Leading industrial research laboratories, public laboratories, and universities have started to combine experimental data with the predictive power and the key to understanding materials properties as offered by atomistic simulations to solve engineering problems connected, e.g. to long-term stability of materials or to identify novel and environment friendly materials. In this situation, as the computer power is tremendously growing, comprehensive computational environments, which take away the burden of routine tasks, are coming to the fore allowing researchers to focus on the scientific problem at hand. Using sophisticated model building and analysis tools, computational environments as the MedeA® software combine experimental structures and phase-diagrams with state-of-the-art computational procedures for property predictions for systems including alloys, semiconductors, ceramics, glasses, polymers, and fluids. Furthermore, these tools facilitate the simulation, e.g. of the electronic structure and mechanical properties, as well as the thermal behaviour for complex structures such as interfaces, heterostructures, grain boundaries, defect structures and random alloys. The comprehensive capabilities of such modelling tools will be illustrated by applications including the development of low-strain cathode materials for batteries, the analysis of grain-boundary stability in electronic devices, and the search for optimum materials for hydrogen storage in the automobile industry.

  • Synthese von antimikrobiellen Polymer-Antibiotika-Konjugaten und Konjugat-Netzwerken

    Martin Schmidt, Lehrstuhl für Biomaterialien und Polymerwissenschaften, TU Dortmund
    19th. April 2018, Vortrag, Lehrstuhl für Biomaterialien und Polymerwissenschaften Seminarraum G1-414 Emil-Figge-Str. 66 Dortmund NRW 44227 Germany

    Time:
    Start: 19th. April 2018 04:15 p.m.
    End: 19th. April 2018 00:00

    http://www.ls-bmp.de/index.php/lehrstuhl/seminar

  • Ladungstransfer, Spintransport und Energiedissipation in Heterostrukturen auf Femtosekunden‐Zeitskalen

    Dr. Andrea Eschenlohr, Universität Duisburg-Essen
    18th. April 2018, Kolloquium, Saal MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 18th. April 2018 12:45
    End: 18th. April 2018 02:15 p.m.

  • Artificial Neural Networks in Mechanics and Materials Science

    Norbert Huber, Helmholtz-Zentrum Geesthacht
    12th. April 2018, ICAMS Special Seminar, Ruhr-Universität Bochum IC 04 408

    Time:
    Start: 12th. April 2018 04:00 p.m.
    End: 12th. April 2018 05:00 p.m.

    Problems in mechanics and materials science can be relatively easy approached by experiments or computational methods, as long as the solution is needed only pointwise, i.e. as long as a the mate-rial response should be determined for a certain set of input parameters as a simple forward prob-lem. An extension of the understanding on the underlying relationship is commonly achieved by systematic variation of some or all of the independent input parameters. This can dramatically in-crease the complexity of the problem. Reasons are the large number of experiments or simulations caused by the number of variations and parameters in the problem or the – still unknown – com-plexity of the relationship. Also the combination of both often appears. The higher the complexity (e.g. caused by nonlinearities), the more dense the parameters space needs to be filled for having sufficient information. All these issues can make a conventional analysis of the problem extremely expensive or impossible to solve. They already occur in forward problems, where the unknown rela-tionship is connecting the independent parameters with the dependent material response. In in-verse problems, additional questions need to be included concerning the existence and uniqueness of the inverse solution as well as the completeness of the information from the available input da-ta.

    Artificial neural networks can principally solve such problems or at least give valuable indications about the solvability or origins of the opposite. This is done by approximating the unknown rela-tionship via training of the neural network using patterns produced pointwise either from experi-ments or computer simulations. Despite their powerful generalization capabilities, they are howev-er still of approximate nature and the validity and accuracy of their output needs to be carefully analyzed. The talk will summarize the common limitations and techniques will be discussed that can enable artificial neural networks to manage problems in mechanics and materials science, where results of high accuracy are expected. Best results can be achieved by hybrid approaches where a priori knowledge is combined with artificial neural networks as corrector. Presented examples will touch forward as well as inverse problems.

  • Evolving functionality in disordered nanomaterial networks

    Wilfred G. van der Wiel, MESA+ Institute for Nanotechnology - University of Twente, Niederlande
    11th. April 2018, Kolloquium, Saal MC122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 11th. April 2018 12:45
    End: 11th. April 2018 02:15 p.m.

  • From Enzymes to Functional Materials - Towards Activation of Small Molecules

    Dr. Ulf-Peter Apfel, RUB
    9th. April 2018, Vortrag, Raum S03 V00 E71, Universitätsstr.2, 45141 Essen

    Time:
    Start: 9th. April 2018 05:15 p.m.
    End: 9th. April 2018 06:45 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • MARCH 2018
  • Zerspanen im modernen Produktionsprozess Fachgespräch zwischen Industrie und Hochschule

    20th. March 2018, Tagung, Technische Universität Dortmund Campus Süd, Hörsaalgebäude I August-Schmidt-Str. 4 44227 Dortmund (Eichlinghofen)

    Time:
    Start: 20th. March 2018 08:00 a.m.
    End: 21st. March 2018 03:30 p.m.

    Bei der diesjährigen Tagung liegt der Schwerpunkt auf aktuellen Forschungen und Neuerungen im Bereich der Werkzeugentwicklung, Maschinenauslegung und der Simulation. Sowohl die wissenschaftliche Betrachtung der Thematik als auch die industrielle Anwendung, bei- spielsweise im Automobil- und Maschinenbau sowie der Luftfahrttechnik, werden gleichermaßen berücksichtigt.

    http://www.isf.de/tagung2018/documents/flyer2018.pdf

  • Exact distribution of spacing ratios for random and localized states in quantum chaotic systems

    Dr. Sai Harshini Tekur, Indian Institute of Science Education and Research, Pune
    16th. March 2018, Theoriekolloquium, MC 351, Lotharstrasse 1, 47057 Duisburg

    Time:
    Start: 16th. March 2018 10:15 a.m.
    End: 16th. March 2018 11:45 a.m.

    Typical eigenstates of quantum systems, whose classical limit is chaotic, are well-approximated as random states. The spectral fluctuations observed in these systems are modeled using the appropriate ensemble of Random Matrix Theory (RMT). However, if deviations from RMT results occur, they may be attributed to the phenomenon of eigenstate localization, which is a counter-intuitive feature known to arise due to purely quantum or semiclassical effects. This leads to a modification in the spectral statistics due to the interaction between the localized and random states in the spectrum of mixed chaotic systems. In this talk, I will discuss a 3x3 random matrix model we have proposed, which has been used to obtain an exact result for the ratio of spacings between a random and localized states. I will also show that the results obtained agree with the spectra computed from realistic physical systems that display localized eigenmodes. These include both time-reversal invariant and non-invariant scenarios.

  • Atomistic modeling of solid-state phase transformations in iron

    Herbert Urbassek, Technische Universität Kaiserslautern
    14th. March 2018, ICAMS Special Seminar, Ruhr Universität Bochum, IC 03/606

    Time:
    Start: 14th. March 2018 04:00 p.m.
    End: 14th. March 2018 05:00 p.m.

    The phase diagram of iron features the notorious and technologically relevant transformation between the low-temperature α-phase (bcc) and the high-temperature γ-phase (fcc). We present an overview of interatomic interaction potentials which are able to describe this transformation. Techniques for calculating the thermodynamics (free energy differences) and kinetics (temporal evolution) of the transition are presented.
    Atomistic simulation provides insights into the pathways of the transformation as the atomic re-ordering is easily followed. Also the orientation relationships along phase boundaries are easily determined.
    Defects – such as free surfaces, grain or phase boundaries – influence the transformation, as does any stress or strain exerted on the specimen. These influences can be analyzed using atomistic simulation.

    http://www.icams.de/content/events/?detail=2095

  • Materials Chain Members’ Assembly 2018

    Julia Reinermann, University of Duisburg-Essen
    9th. March 2018, Members´Assembly, University of Duisburg-Essen NanoEnergieTechnikZentrum (NETZ) Carl-Benz-Str. 199 47057 Duisburg

    Time:
    Start: 9th. March 2018 09:15 a.m.
    End: 9th. March 2018 02:00 p.m.

  • CENIDE Science Talk - Photovoltaics efficient and cheap?

    Julia Reinermann, University of Duisburg-Essen
    9th. March 2018, Science Talk & Materials Chain meeting of members, The venue is Seminar Room 2.42 in the NanoEnergieTechnikZentrum (NETZ) on Duisburg Campus (Carl-Benz-Str. 199, 47057 Duisburg).

    Time:
    Start: 9th. March 2018 09:15 a.m.
    End: 9th. March 2018 00:00

    CENIDE and the UA Ruhr Research Focus Materials Chain will welcome guest speaker Dr. Michael Saliba from the Adolphe Merkle Institute of the University of Fribourg from Switzerland to the Science Talk on Friday, 9 March at 11:15 a.m. Subsequently, Prof. Dr. Martina Schmid from the Experimental Physics Department of the Faculty of Physics at the University Duisburg-Essen will speak.

    Guest speaker Dr. Michael Saliba will talk about the opportunities and challenges of Perovskit in photovoltaics. Perovskit has the advantage that it is highly efficient and very cheap to produce. One challenge is to maintain stability for decades. In his PhD (2014), Saliba was one of the first scientists who study the material Perovskite and its importance for photovoltaics. After his stay at Oxford University, he was a member of the Grätzel Group under his Marie Curie Fellowship from 2015 to 2017. In 2016 he received the Young Scientist Award of the German University Association. In 2017, the MIT Technology Review described him as one of the "35 innovators under 35"worldwide. Prof. Dr. Martina Schmid from Experimental Physics, a CENIDE member, will then give an insight into her research. Her lecture will highlight micro- and nanooptical concepts of solar cells based on chalcopyrites. These offer new approaches to maximise the use of the light spectrum, as the light is directed to where it can be converted most effectively. Schmid has been Professor of Experimental Physics since 2017. From 2012 to 2016, she headed the junior research group "Nanooptical Concepts for Photovoltaics" at the Helmholtz-Zentrum Berlin. She received her doctorate from the Freie Universität Berlin, where she was a junior professor until 2016.

    After the presentations we invite you to a small snack and exchange. Please send your registration form by 2 March to cenide@uni-due.de.

    The lecture series "CENIDE Science Talk" reflects the broad spectrum of CENIDE topics. It is aimed at a broad specialist audience and allows us to look beyond the boundaries of our own field of research.

    This Science Talk will be organised in cooperation with the UA Ruhr Research Focus Materials Chain (materials-chain.de), whose meeting of members will begin on 9 March 2018 at 9.15 a.m..

    Further Information: 

    Dr. Tobias Teckentrup, 0203 379-8178, tobias.teckentrup@uni-due.de
    Editorial Office: Julia Reinermann, 0203/ 379-8176, julia.reinermann@uni-due.de

  • 26th Annual Meeting of the German Crystallographic Society (DGK)

    Prof. Dr. Matthias Epple, Universität Duisburg-Essen
    5th. March 2018, Tagung, Universität Duisburg-Essen Universitätsstraße 2 Gebäude S04 Hörsaalzentrum 45141 Essen

    Time:
    Start: 5th. March 2018 01:00 p.m.
    End: 8th. March 2018 03:00 p.m.

    http://www.dgk-conference.de/

  • Tight binding theory of interstitials in metals

    Anthony T. Paxton, Kings College London, UK
    7th. March 2018, ICAMS Special Seminar, Ruhr-Universität Bochum, IC 02/718

    Time:
    Start: 7th. March 2018 11:00 a.m.
    End: 7th. March 2018 12:30

    I will recall our approach to the polarisable ion and magnetic tight binding approximation, including its application to organic molecules and water; and then focus on the transition metals and their interstitial elements, oxygen, carbon and hydrogen. I will demonstrate tight binding molecular dynamics and statics to study carbon and hydrogen diffusivity and binding to vacancies in ferrite. I will outline future plans for how to calculate interstitial binding to dislocations with a view to upscaling to kinetic Monte Carlo and discrete dislocation dynamics, leading to possible interpretations of observed effects of interstitials on the behaviour of individual dislocations. I will also discuss how we approach the problem of quantum fluctuations of the proton and how we will pursue this in future work.

    http://www.icams.de/content/events/

  • Digital material microstructures by means of tomography for simulation models

    Marion Bartsch, DLR Köln, Ruhr-Universität Bochum
    1st. March 2018, ICAMS Special Seminar, Ruhr-Universität Bochum IC 04 408

    Time:
    Start: 1st. March 2018 04:00 p.m.
    End: 1st. March 2018 05:00

    Properties of materials with a complex microstructure depend on the properties and the arrangement of the microstructural constituents. The presentation will show exemplarily for some materials how to derive 3-dimensional microstructure data on different length scales for the generation of numerical models, suitable for finite element analyses. For different length scales two methods are utilized - non-destructive X-ray tomography in the range from mm to μm and combined sequential focused ion beam (FIB) ablation and scanning electron microscopy in the submicron range.

  • FEBRUARY 2018
  • Discrete multiphysics: a mesh-free approach to multiphysics

    Alessio Alexiadis , University of Birmingham, UK
    27th. February 2018, ICAMS Special Seminar, Ruhr-Universität Bochum IC 02 722

    Time:
    Start: 27th. February 2018 11:00 a.m.
    End: 27th. February 2018 12:00

  • CENIDE-Konferenz

    19th. February 2018, Konferenz, Seminarraum 2.42, Kardinal-Schulte-Haus, Overather Str. 51, 51429 Bergisch Gladbach

    Time:
    Start: 19th. February 2018 10:00 a.m.
    End: 21st. February 2018 03:00 p.m.

    http://www.cenide.de

  • The power of entropy in materials discovery

    Stefano Curtarolo, Duke University, Durham, USA
    19th. February 2018, ICAMS Special Seminar, Ruhr-Universität Bochum IC 04/408

    Time:
    Start: 19th. February 2018 11:00 a.m.
    End: 19th. February 2018 12:00

    High-entropy materials have attracted considerable interest due to their combination of potentially unique properties and promising technological applications. Predicting their formation from previously known parameters remains the major hindrance to the discovery of new systems. In this seminar, we introduce a descriptor - entropy forming ability - for predicting the synthesizability of such systems from first principles calculations. The formalism, based on the energy distribution spectrum of randomized calculations, captures the accessibility of equally-sampled states near the ground state and quantifies configurational disorder potentially leading to high-entropy homogeneous single-phases. The methodology is used to seek for disordered refractory 5-metal carbides potential systems for ultra-high temperature applications. The descriptor correctly predicts a set of candidates that are experimentally synthesized as novel high-entropy homogeneous phases, validating the ansatz of the model. The method has the potential to accelerate the search and development of high-entropy crystalline systems by rationally combining first principles approaches with experimental synthesis.

  • Quantum Time Mirrors

    Prof. Dr. Klaus Richter, Universität Regensburg
    15th. February 2018, Theoriekolloquium, MC 351, Universität Duisburg-Essen, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 15th. February 2018 02:15 p.m.
    End: 15th. February 2018 03:45 p.m.

    Both metaphysical and practical considerations related to time inversion have intrigued scientists for generations. Physicists have strived to devise and implement time-inversion protocols, in particular different forms of "time mirrors" for classical waves and also for spins, the famous Hahn spin-echo. But how to create a corresponding echo for quantum systems with continuous degrees of freedoms? We propose an instantaneous time mirror for such quantum systems, i.e., a controlled time discontinuity through an external pulse, generating wave function echoes with high fidelities. This concept exploits coherent particle-hole oscillations in a Dirac spectrum and can be implemented in systems such as graphene and topological insulators. I will further discuss extensions towards non-equilibrium quantum walks of charge carriers in graphene and quantum echoes in spin-orbitcoupled fermionic many-body systems.

  • Elektrochemische Energiewandler im Kontext der Energiewende

    Prof. Dr. rer. nat. Angelika Heinzel, Universität Duisburg-Essen
    7th. February 2018, Vortrag, Gebäude M, Hörsaal MD 162, Mülheimer Straße/Ecke Lotharstraße, 47057 Duisburg

    Time:
    Start: 7th. February 2018 07:30 p.m.
    End: 7th. February 2018 09:30 p.m.

  • 2D MoS2 grown by MOCVD for optoelectronic applications

    Prof. Dr. Michael Heuken, Aixtron SE, RWTH Aachen
    7th. February 2018, Vortrag, Raum LT 227, Lotharstr. 55, 47057 Duisburg

    Time:
    Start: 7th. February 2018 03:30 p.m.
    End: 7th. February 2018 05:00 p.m.

    For the controlled fabrication of large-area 2D materials, highproductivity MOCVD systems are attractive allowing uniform growth on a high number of large substrates. Defined precursor fluxes and advanced temperature control and homogeneity enable precise and reproducible deposition processes. We report on the optimization of MoS2 growth on sapphire with respect to crystal quality and homogeneous substrate coverage using an AIXTRON hot-wall MOCVD reactor in a 10 x 2 in configuration. Molybdenum hexacarbonyl (MCO) and ditertbutyl sulfide (DTBS) are used as Mo and S sources, respectively [1].

    [1] M. Marx, A. Grundmann, H. Kalisch, A. Vescan, D. Andrzejewski, T. Kümmell, G. Bacher, Y.-R. Lin, and M. Heuken; Photonik West, San Francisco, 2017.

  • Mechanisms of β-to-ω-to-α phase transformation in near β-Ti alloys

    Tong Li, Ruhr-Universität Bochum
    1st. February 2018, ICAMS Special Seminar, IC 04/408, Ruhr-Universität Bochum

    Time:
    Start: 1st. February 2018 04:00 p.m.
    End: 1st. February 2018 05:00 p.m.

  • JANUARY 2018
  • Silylenes as Powerful Steering Ligands in Catalysis

    Prof. Dr. Matthias Driess, Technische Universität Berlin
    31st. January 2018, Vortrag, Raum S07 S00 D07, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 31st. January 2018 05:00 p.m.
    End: 31st. January 2018 09:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_gdch

  • Magnetophononics: ultrafast spin control through the lattice

    Dr. Michael Fechner, MPSD Hamburg
    30th. January 2018, Vortrag, MG 272, Campus Duisburg, Uni Duisburg-Essen, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 30th. January 2018 10:00 a.m.
    End: 30th. January 2018 11:30 a.m.

    The interplay of the electronic and crystal structure determines the functional properties of materials. Consequently, a temporal intervention into this interaction possibly alters existing properties or create transient new ones, which non-existed previously. Here I present: How one can use the selective excitation of phonons, elementary stimuli of the crystal lattice, as a perturbative method to manipulate the magnetic properties of insulators. I will first introduce the general theoretical concept of phonon excitation towards the non-linear regime, also known as non-linear phononics [1], and its possible side effects onto crystal and electronic structure. In the following, I will discuss in detail two studies which utilize this approach in magnetic materials. The first example is the temporal light-induced modulation of the electric polarisation, which creates a magnetization even in materials with no existing spin structure. This transient state of broken space and partiy odd symmetry is multiferroic and comprises unexpected outcomes like a phonon Zeeman effect [2] and magnon excitation [3]. In the second example [4], I show how the phonon excitation and its related structural distortion modulates magnetic exchange interactions. For the specific case of Cr2O3, the right tuning of induced distortions allow modulating the magnetic spin arrangement, which generates a new magnetic state. At the end of my talk will give an outlook and my perspective on future developments in this field.

    References

    [1] M. Forst, C. Manzoni, S. Kaiser, Y. Tomioka, Y. Tokura, R. Merlin, and A. Cavalleri, Nature Phys. 7, 854 (2011).
    [2] D. M. Juraschek, M. Fechner, A. V. Balatsky, and N. A. Spaldin, Phys. Rev. Mat. 1, 014401 (2017).
    [3] T. F. Nova, A. Cartella, A. Cantaluppi, M. Forst, D. Bossini, R. V. Mikhaylovskiy, A. V. Kimel, R. Merlin, and A. Cavalleri, Nature Phys. 13, 132 (2016).
    [4] M. Fechner, A. Sukhov, L. Chotorlishvili, C. Kenel, J. Berakdar, and N. A. Spaldin, arXiv: 1707.03216, (2017).

  • Flame synthesis of nanostructured materials: Processing, modeling, and diagnostics

    Professor Shuiqing Li , Tsinghua University
    30th. January 2018, Vortrag, MB 242, Lotharstr. 1, Uni Duisburg-Essen, 47057 Duisburg

    Time:
    Start: 30th. January 2018 02:00 p.m.
    End: 30th. January 2018 03:00 p.m.

    Gas-phase flame synthesis has not only proved to be one of the most scalable and economical technologies for producing well-controlled nanostructured materials, including single- or mixed-oxide nanocomposite for clean energy use, but also has been recognized as a new low-cost fabrication method of nano-devices. This lecture focus mainly on the recent trends in specific applications of flame aerosol synthesis in the last decade, e.g., usage of a substrate in stagnation geometry with controlled particle temperature-time history, development of advanced spray technique for doping synthesis of nanocomposites of multicomponent metal oxides, and fabrication of nanomaterial- based functional devices. For the possibility to improve the design and operation of flame aerosol reactors, in situ optical diagnostics for either gas phase or particle phase in flame field, along with multi-scale modeling and simulation employing gas-phase chemistry, population balance method, and molecular dynamics are summarized.

  • Functional Colloidal Mesostructures: From Optics to thermal Transport

    Prof. Dr. Markus Retsch, Universität Bayreuth
    30th. January 2018, Kolloquium, Raum S05 V06 E04 Universitätsstr.2, 45141 Essen

    Time:
    Start: 30th. January 2018 02:00 p.m.
    End: 30th. January 2018 03:30 p.m.

  • Surface and Interface Science of Energy Conversion Materials: Novel Insights with X-ray Spectroscopy

    Ioannis Zegkinoglou, Ruhr-Universität Bochum
    29th. January 2018, Physikalisches Kolloquium, H-NB, Ruhr-Universität Bochum

    Time:
    Start: 29th. January 2018 12:00
    End: 29th. January 2018 01:25 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Stereoselective Synthesis of Fluorinated Natural Product Derivatives

    Prof. Dr. Constantin Czekelius, Universität Düsseldorf
    29th. January 2018, Vortrag, Raum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 29th. January 2018 11:15 a.m.
    End: 29th. January 2018 01:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • Effects of defects, doping and strain on the electronic and magnetic properties of monolayer phosphorene: insights from first-principles calculations

    Dr. Juliana M. Morbec, Universität Duisburg-Essen
    26th. January 2018, Theoriekolloquium, MC 351, Uni Duisburg-Essen, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 26th. January 2018 12:00
    End: 26th. January 2018 01:30 p.m.

    Phosphorene is an intriguing two-dimensional material with potential for a variety of applications. Its anisotropic optical and electronic properties combined with high carrier mobilities have attracted increasing attention in the past few years. Moreover, its superior mechanical flexibility has opened the possibility of tuning its electronic and magnetic properties by applying strain. In this talk I will present a first-principles investigation of the interplay between defects, doping and strain on the electronic and magnetic properties of monolayer phosphorene. I will show that compressive strain can reduce the band gap of pristine phosphorene and induce a semiconductor-to-metal transition, while tensile strain can reduce the formation energy of magnetic single vacancies and lead to the stabilization of these defects. I will also discuss the effects of carbon doping on the electronic and magnetic properties of phosphorene, showing that carbon impurity can induce magnetism and a semiconductor-to-metallic transition in this system.

    http://www.theo-phys.uni-essen.de/tp/term/theosem.html

  • Study of the role of segregations and inclusions in thermomechanical pro-cessing and mechanical properties

    Panos Tsakiropoulos, Department of Materials Science and Engineering, The University of Shef-field, United Kingdom
    25th. January 2018, ICAMS-IfM Seminar, IC 04/408, Ruhr-Universität Bochum

    Time:
    Start: 25th. January 2018 04:00 p.m.
    End: 25th. January 2018 05:30 p.m.

    http://www.icams.de/content/events/

  • Stahl, Werkstoff mit Zukunft – Entwicklungen und Anwendungen im PKW-Antriebsstrang

    Dr. R. Lange, Lech-Stahlwerke GmbH
    25th. January 2018, Ringvorlesung, Technische Universität Dortmund Baroper Str. 299 Seminarraum Campus Süd

    Time:
    Start: 25th. January 2018 04:00 p.m.
    End: 25th. January 2018 00:00

    https://www.iul.eu/de/iul/veranstaltungen/509-ringvorlesung-am-25-januar-2018

  • Building molecule and solid analogues from colloidal particles

    Prof. Dr. Peter Schall, Van der Waals-Zeeman Institute, University of Amsterdam
    24th. January 2018, Vortrag, Saal MC122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 24th. January 2018 01:00 p.m.
    End: 24th. January 2018 04:00 p.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Relaxation dynamics in strongly correlated materials - from models to materials

    Dr. Denis Goleˇz, University of Fribourg
    23rd. January 2018, Vortrag, MG 272, Campus Duisburg, Uni Duisburg-Essen, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 23rd. January 2018 10:00 a.m.
    End: 23rd. January 2018 11:30 a.m.

    Strong correlations between spin, charge and orbital degrees of freedom play an important role in materials and a recent development of ultrafast spectroscopies enabled to disentangle these relevant degrees of freedom by their temporal evolution. Due to the complexity of non-equilibrium dynamics it has become necessary to exchange ideas between experimental and theoretical community. I will present recent development of theoretical tools based on dynamical mean field theory (DMFT) that enable us to describe the non-equilibrium dynamics in strongly correlated materials and show how the theoretical development is approaching a realistic description of solids, which is crucial to provide a proper feedback to the experimental community.

    I will start with a summary of the charge carrier relaxation after the photo-excitation in Mott insulators described within DMFT and continue how this formalism can be extended to more realistic description including the role of dynamical screening and non-local fluctuations (GW+EDFMT)[1,2]. First I will describe relevant relaxation channels deep in the Mott phase and close to the metal-insulator transition within a Hubbard model. The relevance of this description will be exemplified by the relaxation dynamics of the photo-emission spectra in 1T-TaS2[3].Then I will introduce an advanced description including the effects of dynamical screening in the charge channel and open the question how to use the laser pulse to manipulate screening in Mott insulators. As an extreme example I will present a self-trapping of the system in the negative temperature state by a proper manipulation of the screening environment, which leads to the enhanced subgap response in the charge susceptibility. This population inversion leads to the low-energy anti-screening and I will comment on its experimental relevance. In the last part I will shed a light on the role of spin fluctuations in the relaxation dynamics, which can be analysed by an extension of DMFT[4], and exemplify how optical pump probe techniques can be used to detect some basic theoretical ideas in higher dimensional doped antiferromagnets, like string states, Trugman paths and the lack of spin-charge separation. At the end I will provide an outlook how to extend these tools to an ab-initio description of strongly correlated materials out of equilibrium.

    References

    [1] D. Golez, M. Eckstein, and P. Werner. Phys. Rev. B, 92:195123, Nov (2015).
    [2] D. Golez, L. Boehnke, H. U. R. Strand, M. Eckstein, and P. Werner. Phys. Rev. Lett., 118:246402 (2017).
    [3] M. Ligges, I. Avigo, D. Golez, H. Strand, L. Stojchevska, M. Kall ˇ ane, P. Zhou, K. Rossnagel, M. Eckstein, P. Werner, and U. Bovensiepen. ArXiv e-prints:1702.05300(2017).
    [4] N. Bittner, D. Golez, M. Eckstein, P. Werner, in preparation.

  • The electrocaloric effect at first order phase transitions: inverse ECE and the impact of hysteresis

    Dr. Anna Grünebohm, Universität Duisburg-Essen
    19th. January 2018, Theoriekolloquium, MC 351, Campus Duisburg, Uni Duisburg-Essen, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 19th. January 2018 12:00
    End: 19th. January 2018 01:00 p.m.

    The electrocaloric effect (ECE) is the adiabatic temperature change of a material in a varying external electrical field which is promising for novel cooling devices [1]. We study the ECE in bulk BaTiO3 using molecular dynamics simulations of a first principles based effective Hamiltonian [2]. The largest ECE is observed at the first order ferroic phase transitions between cubic, tetragonal, orthorhombic, and rhombohedral phases. Analogous to the MCE in Ni-Mn-based Heusler alloys [3], we find an inverse effect, i.e., a temperature decrease under field application, if the external field stabilizes the high entropy phase. Temperature changes of -1 K can be obtained at the tetragonal-orthorhombic transition close to room temperature for small applied fields, provided the field is strong enough to drive the system across the first order transition line [4]. However, the inverse ECE is not fully reversible due to the thermal hysteresis of the transition [5]. In my talk, I will present a systematic investigation of the conventional and inverse ECE in BaTiO3 for different strength and directions of the external field.

    [1] X. Moya et al., Nat. Mat. 13, 439 ,'14
    [2] T. Nishimatsu et al, Phys. Rev. B 78, 104101, ’08; M. Marathe, A. G. et al., Phys. Rev. B 93, 054110‚ '16.
    [3] V. Sokolovskiy, A.G., V. Buchelnikov, and P. Entel, Entropy, 16, 4992, '14
    [4] M. Marathe, A. G., et al. Phys. Rev. B 96, 014102, '17
    [5] M. Marathe, C. Ederer and A.G. PSS B, 1700308, '17

    Kontakt: Prof. Dr. Jürgen König, koenig@thp.uni-due.de

  • Tailoring microstructures and properties by additive manufacturing

    Thomas Niendorf, Institut für Werkstofftechnik, Universität Kassel Tailoring
    18th. January 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum IC 04/408

    Time:
    Start: 18th. January 2018 04:00 p.m.
    End: 18th. January 2018 05:30 p.m.

    http://www.icams.de/content/events/

  • Simulation additiv gefertigter Bauteile –Anwendungen und offene Fragen

    Dr. M. Herrmann, SynOpt GmbH
    18th. January 2018, Ringvorlesung, Technische Universität Dortmund Baroper Str. 299 Seminarraum Campus Süd

    Time:
    Start: 18th. January 2018 04:00 p.m.
    End: 18th. January 2018 00:00

    https://www.iul.eu/de/iul/veranstaltungen/508-ringvorlesung-am-18-januar-2018

  • Signalvermittlung über biologische Membranen, Funktionalisierung von Nanopartikeln

    Prof. Dr. Jacob Piehler, Universität Osnabrück
    18th. January 2018, Vortrag, Raum S05 V06 E04, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 18th. January 2018 02:00 p.m.
    End: 18th. January 2018 05:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortraege_theoretisch_chemisches_kolloquium.shtml

  • Bruno Werdelmann Vorlesung

    Prof. Dr. Helma Wennemers, ETH Zürich
    17th. January 2018, Vortrag, Raum S07 S00 D07, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 17th. January 2018 05:00 p.m.
    End: 17th. January 2018 09:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_gdch

  • Die Rolle der Theorie (mit WIEN2k) in der Materialwissenschaften

    Prof. Dr. Karlheinz Schwarz , Inst. of Materials Chemistry, Techn.Univ. Wien (Vienna University of Technology)
    17th. January 2018, Vortrag, Saal MC122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 17th. January 2018 01:00 p.m.
    End: 17th. January 2018 04:00 p.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Superconductivity with small Fermi energies: Time reversal symmetry breaking and its dynamics

    Prof. Dr. Ilya Eremin, Ruhr-Universität Bochum
    17th. January 2018, Seminar, Raum MG 148, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 17th. January 2018 10:00 a.m.
    End: 17th. January 2018 11:45 a.m.

    https://www.uni-due.de/agbovensiepen/group_seminar.php

  • Organisch-Chemisches Kolloquium

    Dr. Christoph Hirschhäuser, Univeresität Duisburg-Essen, Jun.-Prof. Dr. Jens Voskuhl, Univeresität Duisburg-Essen
    15th. January 2018, Vortrag, Raum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 15th. January 2018 11:15 a.m.
    End: 15th. January 2018 01:15 p.m.

    Dr. Christoph Hirschhäuser
    „Interative Insertion of Carbenoids into Organoborates and Application in Stereolesective Synthesis“

    Jun.-Prof. Dr. Jens Voskuhl
    „Aggregation-induced emission - A versatile tool for biomedical applications“

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • CENIDE Science Talk

    Prof. Dr. Kornelius Nielsch, Institute for Metallic Materials (IMW), Leibniz Institute for Solid State and Materials Research (IFW) , Prof. Dr. Stephan Schulz, Universität Duisburg-Essen
    15th. January 2018, Vortrag, Universität Duisburg-Essen / NETZ / Seminarraum 2.42 / Campus Duisburg / Carl-Benz-Str. 199 / 47057 Duisburg

    Time:
    Start: 15th. January 2018 04:45 p.m.
    End: 15th. January 2018 06:00 p.m.



    20180115 Sciencetalk

    Why are Quantum Materials essential for Thermoelectric Energy Conversion?​

    Prof. Dr. Kornelius Nielsch
    Institute for Metallic Materials (IMW), Leibniz Institute for Solid State and Materials Research (IFW) Dresden

    Synthesis of thermoelectric materials via gas phase and solution-based processes
    Prof. Dr. Stephan Schulz
    Anorganische Chemie, Fakultät für Chemie, Universität Duisburg-Essen

  • BCC high-entropy alloys: microstructures, mechanical properties and underlying deformation mechanisms

    Jean-Philippe Couzinié, Institut de Chimie et des Matériaux Paris-Est, France
    11th. January 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum IC 04/408

    Time:
    Start: 11th. January 2018 04:00 p.m.
    End: 11th. January 2018 05:30 p.m.

    http://www.icams.de/content/events/

  • Entwicklungen im Bereich der Blechmassivumformung rotationssymmetrischer Bauteile

    Dr. J.-A. Feindt, Winkelmann Powertrain Components GmbH & Co. KG
    11th. January 2018, Ringvorlesung, Technische Universität Dortmund Baroper Str. 299 Seminarraum Campus Süd

    Time:
    Start: 11th. January 2018 04:00 p.m.
    End: 11th. January 2018 00:00

    https://www.iul.eu/de/iul/veranstaltungen/507-ringvorlesung-am-11-januar-2018

  • Wie fängt man Licht in Solarzellen?

    Prof. Martina Schmid, Universität Duisburg-Essen
    10th. January 2018, Vortrag, Raum MD 162, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 10th. January 2018 07:30 p.m.
    End: 10th. January 2018 11:55 p.m.

    Die Sonne sendet so viel Energie zur Erde wie 100 Millionen Kohle- oder Kernkraftwerke erzeugen können. Doch wie kann diese Energie nutzbar gemacht werden? Eine Möglichkeit zur direkten Erzeugung elektrische Energie aus Lichtstrahlung stellen Solarzellen dar. Dazu werden spezielle halbleitende Materialien benötigt, die das Sonnenlicht aufnehmen und umwandeln können. Für einen minimalen Einsatz an Rohstoffen ist ein möglichst effektiver Lichteinfang erwünscht.

    Der Vortrag behandelt zuerst die Frage, wie eine Solarzelle funktioniert, bzw. wie aus der Sonnen- elektrische Energie wird. Außerdem zeigt er insbesondere optische Konzepte, durch die das Licht gezielt auf kleinstem Volumen einfangen und für die Umwandlung bereitgestellt wird. Dabei spielen Strukturen eine Rolle, die bis zu 100-mal kleiner sind als die Dicke eines Haares.

    https://www.uni-due.de/de/uni-colleg/2017-18_schmid.php

  • DECEMBER 2017
  • A theoretical tool that predicts the nature of the 4f states in Ce compounds

    Dr. Heike Herper, Uppsala University
    22nd. December 2017, Vortrag, MC 351, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 22nd. December 2017 12:00
    End: 22nd. December 2017 01:00 p.m.

    Cerium is the most abundant rare earth. Its compounds are used in many applications. Depending on the application different materials properties are needed. Since these properties are widely determined by the electronic structure the understanding of the degree of localization of the 4f electron is essential. Aiming to classify the Ce compounds regarding to their itinerant character we studied the hybridization function Δ of a large body of data. The hybridization function has been calculated from first principles using a full-potential LMTO method. We show that the strength of Δ evaluated in this way allows conclusions about the level of 4f localization. The results are consistent with the available experimental information. The calculated information entropy for this set of data clearly hints to a high predictability. Furthermore, a more detailed analysis of the electronic structure and the hybridization function allows us to make precise statements about Kondo correlations in these systems. Technically we combine concepts of electronic structure theory, many body physics and information theory. This approach allows us to establish general trends of correlated electronic structures and we can address important questions such as how to find new materials and how to characterize them.

    http://www.theo-phys.uni-essen.de/tp/term/theosem.html

  • A show with sand and snow

    Prof. Dr. Dietrich Wolf, Universität Duisburg-Essen
    20th. December 2017, Vortrag, Saal MC122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 20th. December 2017 01:00 p.m.
    End: 20th. December 2017 04:00 p.m.

    Granular media can be very entertaining for scientists. The reason is that on first sight they offer themselves as macroscopic illustration of molecular dynamics in gases, fluids or solids. The closest analogy exists perhaps with glasses. Upon closer look, however, the vast number of internal degrees of freedom of each particle and the excluded volume interaction give rise to phenomena that have no counterpart in gases, fluids and solids. In this talk some “kitchen table” demonstrations of these phenomena will be presented. Their relation to modern research in different fields ranging from astrophysics to robotics will be discussed.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • X-ray Absorption and Scattering Spectroscopy in Solids from Many-Body Perturbation Theory

    Christian Vorwerk, Humboldt University of Berlin
    19th. December 2017, Vortrag, Raum MG 272, Lotharstraße 1, 47057 Duisburg

    Time:
    Start: 19th. December 2017 10:00 a.m.
    End: 19th. December 2017 12:00

    X-ray absorption and inelastic scattering spectroscopy reveal the electronic and structural properties in crystalline materials on the atomic scale through the excitation of tightly-bound electronic core states. The determination of these spectra from first principles requires an accurate description of the electron-core hole interaction, which is typically screened by the surrounding many-electron system. In the approach [1] presented here, core excitations are determined through the solution of the Bethe-Salpeter equation (BSE), which includes the full non-local screened interaction between electron and core hole. Our implementation in the exciting [2] package makes use of Kohn- Sham single-particle energies and wavefunctions for both the core and conduction region, which are obtained from all-electron full-potential DFT calculations on equal footing. To demonstrate our approach, we discuss core spectra of selected bulk materials, ranging from simple oxides, like CaO [1], to complex systems, such as hybrid organic-inorganic perovskites. Our results, in good agreement with available experimental data, provide an in-depth analysis of the excitations, revealing their origin in the band structure and their real-space localization.

    References

    [1] C. Vorwerk, C. Cocchi, and C. Draxl, Phys. Rev. B 95, 155121 (2017).
    [2] A. Gulans et al., J. Phys. Condens. Matter 26, 363202 (2014).

    https://www.uni-due.de/sfb1242/colloquium.php

  • Metalloide Cluster von Germanium, Zinn und Gold: Einblicke in einen normalerweise verborgenen Bereich der Metalle

    Prof. Dr. Andreas Schnepf, Universität Tübingen
    18th. December 2017, Vortrag, S03 V00 E71, Universitätsstr. 2, Campus Essen

    Time:
    Start: 18th. December 2017 05:15 p.m.
    End: 18th. December 2017 08:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • Mechanical Metamaterials: Using kirigami as strategies for actuator designs

    Prof. Dr. Marcello Dias, University of Aarhus, Denmark
    18th. December 2017, Vortrag, Raum S05 V06 E04, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 18th. December 2017 05:15 p.m.
    End: 18th. December 2017 08:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortraege_theoretisch_chemisches_kolloquium.shtml

  • Generalized factorial cumulants of electron tunneling

    Dr. Philipp Stegmann, Universität Duisburg-Essen
    15th. December 2017, Vortrag, MC 351, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 15th. December 2017 12:00
    End: 15th. December 2017 01:00 p.m.

    Tunneling of electrons through mesoscopic systems such as quantum dots or metallic islands is a stochastic process. The number of the transferred electrons per time interval is determined by a probability distribution also referred to as the full counting statistics. Remarkable progress in nanotechnology has led to the development of electrometers so sensitive that transport of individual electrons can be observed in a time-resolved manner. Therefore, the probability distribution can be directly measured. However, it is quite challenging to analyze the information contained in the distribution. In my talk, I will elaborate on the benefits of generalized factorial cumulants as a tool to obtain useful information from the probability distribution.

    http://www.theo-phys.uni-essen.de/tp/term/theosem.html

  • Sektorkopplung: Auf dem Weg zur Dekarbonisierung des Energiesystems – Hintergründe, Ansätze, Herausforderungen

    Prof. Dr.-Ing. Richard Hanke-Rauschenbach, Leibniz Universität Hannover
    12th. December 2017, Vortrag, Gebäude NETZ, 2.42, Carl-Benz-Str. 199, 47057 Duisburg, Campus Duisburg

    Time:
    Start: 12th. December 2017 01:00 p.m.
    End: 12th. December 2017 02:00 p.m.

  • Tailor made porous polymer thin films as a novel biomaterials and nanomembranes

    Dr. Manuel Tsotsalas, Karlsruher Institut für Technologie
    11th. December 2017, Vortrag, Raum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 11th. December 2017 11:15 a.m.
    End: 11th. December 2017 01:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • γ-TiAl-alloys – some not so well known aspects of a well known system

    Florian Pyczak, Helmholtz-Zentrum Geesthacht
    7th. December 2017, ICAMS Special Seminar, Ruhr-Universität Bochum IC 04/408

    Time:
    Start: 7th. December 2017 04:00 p.m.
    End: 7th. December 2017 05:30 p.m.

    γ-TiAl alloys now replace heavier nickel-base superalloys as material for some turbine blade applications in jet aero engines up to service temperatures of 750 °C. This is due to their lower density, higher specific strength and better creep resistance in that temperature regime. Nevertheless, there is an ongoing research to make γ-TiAl alloys more damage tolerant, easier to process and more creep resistant. To achieve this different alloying elements are added. Niobium can improve the creep as well as the oxidation resistance. Carbon additions are potential means to improve the high temperature strength of γ-TiAl alloys. Unfortunately, when deviating from the binary Ti-Al system by adding increasing amounts of alloying elements the phase constitution changes significantly and phenomena unknown in the binary system occur.

    The paper will present investigations about the morphological stability of carbides in γ-TiAl alloys. Investigations by transmission electron microscopy reveal that contrary to the typical coarsening of precipitate particles to achieve a better balance between energy gain scaling with volume and interfacial energy scaling with surface area these carbide precipitates decompose in smaller sub-particles. As it can be excluded that this is part of a dissolution process of these carbides the most probable explanation is a favourable contribution of elastic interaction energy between the carbide sub particles. The transmission electron investigations give insight into details of the process as a local re-orientation of the matrix regions between the sub particles. The orthorhombic O-phase in a Ti-42Al-8.5Nb alloy is investigated clearing its structure and transformation history as well as its local arrangement in the microstructure. The O-phase was until now not reported in this composition range and only a combination of in-situ high energy X-ray diffraction and transmission electron microscopy could give a deeper insight. Nevertheless, not all aspects are cleared yet. Especially the question if O-phase is stable in the composition and temperature regime under investigation or is stabilized by local stress states could not be decided conclusively. It is noteworthy that even in the binary system some features are still debated. In literature no agreement whether the β-phase at high temperature is an unordered solid solution with bcc structure or shows an ordering of titanium and aluminum atoms exhibiting a B2 structure is achieved. By measurements at temperature using neutron diffraction which is especially sensitive to ordering of the crystal structure under investigation it is shown that a number of alloying elements promote the ordering to the B2 structure but that the unordered bcc β-phase is present in the binary system contrary to what is reported in some phase diagrams.

    http://www.icams.de/content/events/?detail=2042

  • Nonequilibrium properties of Mott insulators

    Dr. Zala Lenarcic, University of Cologne
    5th. December 2017, Vortrag, Gebäude MG, Raum MG 272, Campus Duisburg Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 5th. December 2017 10:00 a.m.
    End: 5th. December 2017 12:00 p.m.

    Mott insulators represent a paradigmatic system for studying the effects of strong electron correlations and have opened fundamental questions when driven out of equilibrium. When exposed to a constant or a pulsed electric field their insulating nature can be modified due to the creation of excitations, which can be represented with effectively charged holons and doublons. It is a great theoretical challenge to understand how charge carriers are created, but also how stable they are, on what time scales they relax, how they interact with other bosonic degrees of freedom, and eventually recombine. I will present our contribution to the understanding of the dynamics of holons and doublons after being created, for example, in a pump-probe experiment. After giving a brief insight into the short-time (femto-second) dynamics of excited charges I will show that in two-dimensional systems the observed charge recombination can be quantitatively explained with emission of spin excitations. In one dimensional systems, on the other hand, the coupling to phonons plays an essential role. Both studies are unified under the conclusion that the recombination rate is exponentially suppressed with the number of bosonic excitations that are created during such a process.

    https://www.uni-due.de/sfb1242/colloquium.php

  • Nichtgleichgewichtsdynamik optischer Phänomene in der Weihnachtsdomäne

    Prof. Dr. Axel Lorke, Universität Duisburg-Essen, Dr. Nicolas Wöhrl, Universität Duisburg-Essen
    5th. December 2017, Vortrag, Lotharstr. 1 - Raum MF 346 47057 Duisburg

    Time:
    Start: 5th. December 2017 10:15 a.m.
    End: 5th. December 2017 11:00 a.m.

  • Mechanisms of the simultaneous increase of strength and ductility in heavily cold rolled bcc metals

    Jens Reiser, KIT, Karlsruhe
    4th. December 2017, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02/718

    Time:
    Start: 4th. December 2017 04:00 p.m.
    End: 4th. December 2017 05:00 p.m.

    This presentation is about fundamental mechanisms of plastic deformation and fracture of bcc metals. In particular, the increase of strength and ductility after heavy cold rolling will be elucidated. We define ‘ductility’ as both, the tensile ductility (i.e. uniform elongation), and the brittle-to-ductile transition (BDT). Five tungsten (W) sheets have been rolled out from one and the same sintered ingot. The sheets differ in their degree of deformation. Electron microscopy as well as mechanical tests have been applied to identify deformation mechanisms. These are the main results: 1) Tensile tests show a change of deformation and hardening mechanisms after heavy cold rolling. A type of confined slip with only three active slip systems is suggested. 2) Strain-rate jump tests display an increase of the strain-rate sensitivity above the critical temperature. From this, a change in the dislocation-grain-boundary-interaction can be inferred. 3) The BDT decreases by more than 600 K down to -65 °C. The BDT temperature scales with the grain size (Fig. 1(. 4) The activation energy of the BDT, suggests that the BDT is still controlled by the glide of screw dislocations.

  • NOVEMBER 2017
  • Modeling contacts between metal surfaces

    Lucia Nicola, Department of Materials Science and Engineering, Delft University of Technology
    30th. November 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum IC 04/408

    Time:
    Start: 30th. November 2017 04:00 p.m.
    End: 30th. November 2017 05:30 p.m.

    http://www.icams.de/content/events/

  • Reliable Test Results

    R. Strehle, Zwick GmbH & Co. KG
    30th. November 2017, Ringvorlesung, Technische Universität Dortmund Baroper Str. 299 Seminarraum Campus Süd

    Time:
    Start: 30th. November 2017 04:00 p.m.
    End: 30th. November 2017 00:00

    https://www.iul.eu/de/iul/veranstaltungen/506-ringvorlesung-am-30-november-2017

  • Workshop: Multiscale modeling and simulation of fracture and fragmentation

    Michael Ortiz, California Institute of Technology, USA; Hausdorff Center for Mathematics, Germany, A. Gandhi and D. Balzani, Ruhr-Universität Bochum, I. Khisamitov and G. Meschke, Ruhr-Universität Bochum, P. Junker and K. Hackl, Ruhr-Universität Bochum, J.J. Timothy and G. Meschke, Ruhr-Universität Bochum
    29th. November 2017, Workshop SFB 837, Ruhr-Universität Bochum IC 03 / 606

    Time:
    Start: 29th. November 2017 01:30 p.m.
    End: 29th. November 2017 04:00 p.m.

    Multiscale modeling and simulation of fracture and fragmentation – application to fused silica glass (M. Ortiz, CalTech)
    The anomalous shear modulus behavior of fused silica glass has been a long-standing topic of investigation. Likewise, the anomalous pressure dependence of the strength of amorphous silica has also received considerable attention. In order to formulate a model of material behavior, we perform molecular dynamics (MD) calculations designed to data-mine information regarding the permanent deformation, both volumetric and in shear, of amorphous silica. Based on these observations, we formulate a critical-state constitutive model for fused silica and fit material parameters to the MD data. Remarkably, the MD data reveals that the limit yield surface is nonconvex. The treatment of this non-convexity necessitates a fundamental extension of classical plasticity. We consider the implications of this extension and utilize tools from the Direct Methods in the Calculus of Variation to characterize explicitly the effective behavior at the macroscale. The resulting effective model of plasticity, together with consideration of brittle fracture of fragmentation, provide the basis for the simulation of failure waves in glass rods impacting a rigid target. The calculations are carried out using the Optimal-Transportation Meshfree (OTM) method combined with the eigenerosion approach to fracture. This computational approach proves effective at predicting the experimentally observed failure wave speeds and complex fracture and fragmentation patterns, while simultaneously allowing for complex material behavior.

    The Guest Lecture by Prof. Ortiz is followed by four presentations by Ph.D. and PostDoc researchers:
    Coupled two-scale simulation of multiphase steel (A. Gandhi and D. Balzani)
    Variational interface model in solid and hydraulic (I. Khisamitov and G. Meschke)
    Fracturing problems: A relaxation-based approach to damage modeling (P. Junker and K. Hackl)
    Multiscale modeling of transport and deterioration in porous materials (J.J. Timothy and G. Meschke)

    http://sfb837.sd.rub.de/

  • Cu(In,Ga)Se2 at the micro- and nanometer scale

    Dr. Sascha Sadewasser, Laboratory for Nanostructured Solar Cells INL - International Iberian Nanotechnology Laboratory, Portugal
    29th. November 2017, Vortrag, Raum BA 115, Campus Bismarckstr. 81, 47057 Duisburg

    Time:
    Start: 29th. November 2017 10:00 a.m.
    End: 29th. November 2017 12:00

    Polycrystalline p-type Cu(In,Ga)Se2 (CIGSe) semiconductors represent the absorber material in the thin film solar cells which currently reach the highest power conversion efficiency. The recent efficiency improvements have been achieved by the introduction of a potassium fluoride post-deposition treatment (KF-PDT). Direct and indirect effects of potassium at the interface and interface-near region in the CIGSe layer are thought to be responsible for this improvement. Using Kelvin probe force microscopy (KPFM), we show that also the electronic properties of grain boundaries (GBs) are beneficially modified by the KF-PDT. KPFM images spatially resolved surface potential of the CIGS surface. We observe that the KF-PDT increases the band bending at GBs by about 70% and results in a narrower distribution of work function values at the GBs [1]. This effect of the KF-PDT on the GB electronic properties is expected to contribute to the improved efficiency values observed for CIGSe thin-film solar cells with KF-PDT.

    The second part of the presentation will be dedicated to solar cell concepts that rely on the incorporation of CIGSe micro- and nanostructures. The growth of CuInSe2 (CISe) nanowires was achieved in a single step vacuum-based co-evaporation process. The resulting nanowires grow on top of a polycrystalline base layer, which makes them interesting for photovoltaic applications, especially for improved light absorption [2]. Micro-scale CISe islands were deposited by electro-deposition into holes in a SiO2 matrix. Subsequently, the CISe islands were converted into solar cell devices, representing the first realization of micro solar cells deposited by a materials efficient growth process [3]. The devices can be used as micro-concentrator solar cells by adding a micro lens array. As a final example, a point-contact passivation layer for the realization of ultra-thin CIGSe solar cells will be presented. Thin (10-20 nm) Al2O3 layers were deposited directly on the Mo back contact and a regular hole pattern (diameters of a few 100 nm) was defined by electron beam lithography and opened by reactive ion etching. This point-contact passivation layer results in an increase from 8% to 11.8% for CIGSe devices with only 240 nm absorber layer thickness [4].


    References:


    [1] N. Nicoara, Th. Lepetit, L. Arzel, S. Harel, N. Barreau, and S. Sadewasser, Scientific Reports 7, 41361 (2017).
    [2] H. Limborço, P.M.P. Salomé, J.P. Teixeira, D. Stroppa, R.-Ribeiro Andrade, N. Nicoara, K. Abderrafi, J. Leitão, J.C. González, and S. Sadewasser, CrystEngComm 18, 7147 (2016).
    [3] S. Sadewasser, P. Salomé, and H. Rodriguez-Alvarez, Sol. Energy Mat. Sol. Cells 159, 496 (2017).
    [4] B. Vermang, J.T. Wätjen, Ch. Frisk, V. Fjällström, F. Rostvall, M. Edoff, P. Salomé, J. Borme, N. Nicoara, S. Sadewasser, IEEE J. Photovoltaics 4, 1644 (2014).

  • Dynamik und Struktur von Defekten auf einer molekularen Skala

    Joern Schmedt, Universität Siegen
    27th. November 2017, Vortrag, Raum S03 V00 E71, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 27th. November 2017 05:15 p.m.
    End: 27th. November 2017 11:55 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • Studying correlated systems with ultracold atoms

    Prof. Dr. Mariusz Gajda, Polish Academy of Sciences, Warsaw
    24th. November 2017, Vortrag, MC 351, Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 24th. November 2017 12:00
    End: 24th. November 2017 02:00 p.m.

    Experimental achievements in cooling and manipulating ultracold atoms introduced atomic physics into the world of many-body correlated systems – the domain of condensed matter physics. With optical lattices mimicking crystalline structures, and atoms substituting for electrons, such ultracold systems became a very universal playground for studying a variety of many-body effects. Precise control of many essential parameters and the possibility of a direct observation are the important advantages of atomic systems. In my talk I will concentrate on some aspects of ultracold atoms physics starting with exotic phases in optical lattices, discussing results of single shot images of quantum many-body systems and describing the recent discovery of liquid atomic droplets.

    http://www.theo-phys.uni-essen.de/tp/term/abstracts/Theo-Sem-WS1718/gajda.pdf

  • Evonik-Lecture

    Prof. Dr. Dr. h.c. Bernhard Rieger, Technische Universität München
    22nd. November 2017, Vortrag, Evonik Industries AG, Gerlingstr. 65 (Tor 3), 45139 Essen

    Time:
    Start: 22nd. November 2017 05:00 p.m.
    End: 22nd. November 2017 09:00 p.m.

    Catalytic Precision Polymerization

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_gdch

  • Studying ion transport in ionic liquids and polymer electrolytes by NMR methods

    Prof. Dr. Monika Schönhoff, Universität Münster
    20th. November 2017, Vortrag, Raum S05 V06 E04, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 20th. November 2017 05:15 p.m.
    End: 20th. November 2017 08:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortraege_theoretisch_chemisches_kolloquium.shtml

  • Gravitationswellen - Vorhersage, Herausforderungen und neue Einblicke

    Rainer Grauer, Ruhr-Universität Bochum, Daniel Hägele, Ruhr-Universität Bochum, Dominik Bomans, Ruhr-Universität Bochum
    20th. November 2017, Physikalisches Kolloquium, Ruhr-Universität Bochzum, H-NB

    Time:
    Start: 20th. November 2017 12:00
    End: 20th. November 2017 01:30 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Supramolecular strategies in transition metal catalysis; from supramolecular ligands to large nanospheres

    Prof. Dr. Jost Reek, University of Amsterdam, Netherlands
    20th. November 2017, Vortrag, Raum S05 T02 B02, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 20th. November 2017 11:15 a.m.
    End: 20th. November 2017 01:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_organisch_chemisches_kolloquium.shtml

  • Early stages of oxidation and sulfidation of high-temperature alloys studied by synchrotron X-ray diffraction and absorption techniques

    Christiane Stephan-Scherb, Bundesanstalt für Materialforschung, Berlin
    16th. November 2017, ICAMS-IfM Seminar, IC 04/408, Ruhr-Universität Bochum

    Time:
    Start: 16th. November 2017 04:00 p.m.
    End: 16th. November 2017 04:30 p.m.

  • Steigender Bedarf an großen Bauteilen: Herausforderungen an die Umformmaschinen

    U. Muschalik, SMS group GmbH
    16th. November 2017, Ringvorlesung, Universität Dortmund Baroper Str. 299 Seminarraum Campus Süd

    Time:
    Start: 16th. November 2017 04:00 p.m.
    End: 16th. November 2017 00:00

    https://www.iul.eu/de/iul/veranstaltungen/505-ringvorlesung-am-16-november-2017

  • Nonlinear softmode dynamics studied by 2D terahertz spectroscopy and femtosecond x-ray diffraction

    Dr. Michael Wörner, Max-Born-Institut fur Nichtlineare Optik und Kurzzeitspektroskopie
    14th. November 2017, Vortrag, Gebäude MG, Raum MG 272, Campus Duisburg Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 14th. November 2017 10:00 a.m.
    End: 14th. November 2017 12:00 p.m.

    Soft modes are a particular type of polar low-frequency lattice vibrations in crystals. They display pronounced frequency downshifts when the material approaches a structural phase transition such as in displacive ferroelectricity. The strong coupling between electronic interband and vibrational transition dipoles can strongly enhance the vibrational oscillator strength, leading to the so-called polarization catastrophe in a phase transition from the para- to the ferroelectric state of a crystal. We investigated the nonlinear response of the soft mode in aspirin crystallites using two-dimensional terahertz spectroscopy. Coherent excitation of the soft mode leads to a pronounced blue shift of the soft mode which recovers gradually with its picosecond decay. In another experiment we investigated the electronic and nuclear motions in ferroelectric ammonium sulfate using femtosecond x-ray diffraction. The soft mode oscillation is by far dominated by electronic currents rather than nuclear motions. For strong coherent excitation we observe even polarization switching.

    https://www.uni-due.de/sfb1242/colloquium.php

  • A multiphysics simulation approach towards additive manufacturing

    Bernhard Peters, Université du Luxembourg
    14th. November 2017, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02/718

    Time:
    Start: 14th. November 2017 11:30 a.m.
    End: 14th. November 2017 12:30

  • Mesoscopic energy conversion, thermal control and beyond

    Prof. Dr. Jian-Hua Jiang, Soochow University, China
    10th. November 2017, THEORIEKOLLOQUIUM, Gebäude MC, Raum MC 351, Campus Duisburg Lotharstr. 1 47057 Duisburg

    Time:
    Start: 10th. November 2017 12:00
    End: 10th. November 2017 02:00 p.m.

    A new subfield, inelastic thermoelectricity, is illustrated where the elementary physical pictures and models are introduced. We show several advantages of inelastic thermoelectricity: the potential for high-performance thermoelectricity and the anomalous transport effects that cannot be realized in elastic transport. We specially focus on several unusual effects: cooling by heating and linear thermal transistor effect, for instance. We further discuss thermal control using nonlinear thermoelectric effect, universality of optimal efficiency and power for general thermodynamic systems.

    http://www.theo-phys.uni-essen.de/tp/term/abstracts/Theo-Sem-WS1718/jiang.pdf

  • Thermografie-Workshop „Möglichkeiten und Grenzen der Thermografie“

    9th. November 2017, Workshop, TU Dortmund Institute of Mechanics, Raum 165 MB I, Leonhard-Euler-Str. 5 44227 Dortmund

    Time:
    Start: 9th. November 2017 02:00 p.m.
    End: 9th. November 2017 05:00 p.m.

    Hiermit möchten wir – das Institut für Mechanik (IM) der Fakultät Maschinenbau – herzlich zum Workshop „Möglichkeiten und Grenzen der Thermografie“ einladen. Der Workshop wird in Kooperation mit der Fa. InfraTec durchgeführt, deren Thermografiesysteme an der TU Dortmund in Forschung und Lehre zum Einsatz kommen. ie Agenda sieht dabei Punkte wie „Allgemeines zur Infrarot-Thermografie“, „Gekühlte und ungekühlte High-End-Thermografiesysteme“, „Mikro- und High-Speed-Thermografie“ sowie „Zerstörungsfreie Prüfung/Aktiv-Thermo-grafie“ vor, ist aber nicht darauf beschränkt oder festgelegt. Spezielle Wünsche seitens der Teilnehmenden können gerne – sofern vorab mit ausreichendem Vorlauf kommuniziert – in die Agenda aufgenommen werden.

  • Komplexe Strukturen und spontane Chiralität in Flüssigkeiten

    Prof. Dr. Carsten Tschierske, Universität Halle
    8th. November 2017, Vortrag, Raum S07 S00 D07, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 8th. November 2017 05:00 p.m.
    End: 8th. November 2017 09:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_gdch

  • It's the Electron, Stupid! From X-ray Tubes to X-ray Free Electron Lasers

    Prof. Dr. Helmut Dosch, Deutsches Eletronen-Synchroton DESY, Hamburg
    8th. November 2017, Vortrag, Saal MC122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 8th. November 2017 01:00 p.m.
    End: 8th. November 2017 04:00 p.m.

    The discovery of x-rays in 1895 and of x-ray diffraction in 2012 has truly revolutionized our world and our society. X-ray diffraction has opened our eyes to the molecular structure of all objects around us.

    Today, x-rays are exploited at the highest finesse to unravel new insights into the chemical, electronic or magnetic structure of materials and into the molecular structure of biological molecules and systems. Thereby, scientists take advantage of the unique properties of Synchrotron radiation provided at electron storage rings, as at PETRA III at DESY, the most brilliant x-ray source on earth.

    We are currently at the verge of the next revolution in x-ray science: The discovery of lasing in the x-ray regime has opened the gateway to femtosecond snapshots of the motion of molecules and electrons in matter allowing life reports from (bio-) chemical reactions and the x-ray structure analysis of single particles. The European XFEL in Hamburg which has started operation on Sep 1 is one of the most advanced concepts based on superconducting accelerator technology.

    All these initiatives are driven by one common vision to ultimately achieve quantum control of energy and matter on the scale of a single electron.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Time-dependent density functional theory: linear response (excitons) and beyond (all-optical switching)

    Dr. Sangeeta Sharma, Max-Planck-Institut fur Mikrostrukturphysik
    7th. November 2017, Vortrag, Gebäude MG, Raum MG 272, Campus Duisburg Lotharstr. 1, 47057 Duisburg

    Time:
    Start: 7th. November 2017 10:00 a.m.
    End: 7th. November 2017 12:00 p.m.

    Time dependent density functional theory (TD-DFT) extends density functional theory into the time domain. In the talk I will give a brief sketch of the Runge-Gross theorem (the basic theorem for TD-DFT) which establishes that the time-dependent external potential is a unique functional of the time dependent density, given the initial state. Based on this theorem, a system of non-interacting particles can be chosen such that the density of this non-interacting system is equal to that of the interacting system for all times. Having this density, all time dependent observables can then be calculated.

    https://www.uni-due.de/sfb1242/colloquium.php

  • Die wunderbare Welt der Erdalkalimetall-Hydride: von Anwendungen in der Katalyse zur Wasserstoffspeicherung

    Prof. Dr. Sjoerd Harder, Universität Erlangen-Nürnberg
    6th. November 2017, Vortrag, S03 V00 E71, Universitätsstr. 2, Campus Essen

    Time:
    Start: 6th. November 2017 05:15 p.m.
    End: 6th. November 2017 08:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_anorganisch_chemisches_kolloquium.shtml

  • Mathematische und physikalische Kenntnisse und Fähigkeiten zu Studienbeginn

    David Buschhüter, Universität Potsdam
    6th. November 2017, Physikalisches Kolloquium, Ruhr-Universität Bochum, H-NB

    Time:
    Start: 6th. November 2017 12:15
    End: 6th. November 2017 01:30 p.m.

    Zur erfolgreichen Aufnahme eines Physikstudiums ist ein Mindestmaß an mathematischen und wahrscheinlich auch physikalischen Kenntnissen und Fähigkeiten unerlässlich. Trotz der Einführung von speziellen Brückenkursen an den Universitäten sprechen Berichte von Lehrenden für eine zunehmende Heterogenität in Leistungsmerkmalen der Studierenden. Hinsichtlich der mathematikbezogenen Eingangsanforderungen wird im Besonderen ein Rückgang elementarer Fertigkeiten befürchtet. Der Vergleich von 2718 Physikstudierende aus dem Jahr 1978 mit 2322 Studienanfängerinnen und - anfängern der Physik im Wintersemester 2013/14 im gleichen Studieneingangstest zu Vorkenntnissen in Mathematik und Phys ik zeigte keine Evidenz, dass die Studierenden 2013 in ihren Kenntnissen und Fähigkeiten pauschal schlechter waren als die Studierenden 1978. Stattdessen zeigt sich, dass die Veränderungen einer differenzierteren Betrachtung bedürfen. Außerdem konnte anhand einer Stichprobe von 127 Studierenden gezeigt werden , dass physikbezogene Leistungsmerkmale zusätzlich zu den in Vorkursen zumeist fokussierten mathematischen Kenntnissen und Fähigkeiten Unterschiede im späteren Studienerfolg erklären.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • OCTOBER 2017
  • Quantum computing: from theory towards technology

    Prof. Dr. De Raedt, Zernike Institute for Advanced Materials, University of Groningen, the Netherlands
    25th. October 2017, Vortrag, Saal MC122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 25th. October 2017 01:00 p.m.
    End: 25th. October 2017 04:00 p.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Die Erfindung des Transistors

    Andreas Wieck, Ruhr-Universität Bochum
    21st. October 2017, Saturday Morning Physics, H-NA, Ruhr-Universität Bochum

    Time:
    Start: 21st. October 2017 10:30 a.m.
    End: 21st. October 2017 12:15

    Wie ist das wohl wichtigste elektronische Bauelement erfunden worden und wie funktioniert es eigentlich? Mittlerweile sind Milliarden davon in jedem Computer verbaut, ja sogar schon in jedem USB-Speicherstick. In diesem Vortrag wird auf einige historische und technische Details eingegangen, um die Basis unserer Technologie etwas verständlicher zu machen. Dazu diskutieren wir auch die Funktionsweise einer Diode, die sowohl für Transistoren als auch für die moderne Lichterzeugung relevant ist. Selbstverständlich kann dieser Vortrag nicht die ganze Halbleiterphysik darstellen, es soll aber gezeigt werden, welche wesentlichen Klippen die Menschheit zu überwinden hatte, um zu diesem überwältigenden technischen Erfolg zu kommen.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/saturday-morning-physics.html

  • Virtual materials on real machines

    Rebecca Janisch, ICAMS, Ruhr-Universität Bochum, Fathollah Varnik, ICAMS, Ruhr-Universität Bochum, Godehard Sutmann, ICAMS, Ruhr-Universität Bochum and Forschungszentrum Jülich
    19th. October 2017, ICAMS Inaugural Lectures, Universitätsforum (UFO), Ruhr-Universität Bochum

    Time:
    Start: 19th. October 2017 02:00 p.m.
    End: 19th. October 2017 04:00 p.m.

    • Grain boundaries - boon and bane of structural materials, Rebecca Janisch
    • Glasses: As soft as paste and as hard as steel, Fathollah Varnik
    • Phases and faces of high performance computing, Godehard Sutmann

    The lectures will take place at the Universitätsforum (UFO), close to the university's underground station.

    All interested researchers and especially all students of related master's programmes are cordially invited to visit the lectures.

    http://www.icams.de/content/events/?detail=2026

  • Static and Dynamic Bioinspired Self-Assembled Material Systems

    Prof. Dr. Andreas Walther, Universität Freiburg
    18th. October 2017, Vortrag, Raum S07 S00 D07, Universitätsstraße 2, 45141 Essen

    Time:
    Start: 18th. October 2017 05:00 p.m.
    End: 18th. October 2017 09:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vortr%C3%A4ge_gdch

  • Direct look at charge, lattice and spin dynamics in solids with ultrafast terahertz spectroscopy

    Prof. Dr. Dmitry Turchinovich, Universität Duisburg-Essen
    18th. October 2017, Vortrag, Saal MC122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 18th. October 2017 01:00 p.m.
    End: 18th. October 2017 04:00 p.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Spin Currents in Unconventional Systems

    Martin Gradhand, University of Bristol UK
    16th. October 2017, Physikalisches Kolloquium, Ruhr-Universität Bochum H-NB

    Time:
    Start: 16th. October 2017 12:00
    End: 16th. October 2017 01:00 p.m.

    Spin-orbit driven effects, have been under intensive research over the past decade. The growing interest in this area is partially driven by its technological significance in the area of magnetic random access memory (MRAM). In the wake of this technological interest, rather traditional effects such as the anomalous Hall effect came back into focus since it shares similar driving mechanisms but is much easier accessible experimentally.

    In this talk I will introduce the basic concepts for spin - orbit driven transport phenomena involving th e Berry curvature of Bloch electrons which is intimately related to topological invariants characterising Chern and toplogical insulators. Furthermore, I will discuss the effect of targeted impurity doping on various transport properties. In order to put t his work into context I give a brief introduction to the technological aspects of the ongoing research on MRAM devices.

    Finally, I will put the specific effects into a broader framework of linear response theory, where the existence of transport phenomena is intertwined with the symmetry of the underlying system. This allows us to exploit charge and spin Hall effects to probe novel states of matter such as chiral charge density wave phases as well as unconventional superconductivity with the extension of the Berry curvatures to the superconducting state.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • First-principles calculation of oxygen self-diffusivity in zirconia

    Prof. Dr. Ying Chen, Tohoku University, Sendai, Japan
    13th. October 2017, ICAMS Special Seminar, ICAMS, IC 02-518, Ruhr-Universität Bochum

    Time:
    Start: 13th. October 2017 11:00 a.m.
    End: 13th. October 2017 12:00

    A first-principles calculation of the self-diffusivity of oxygen in tetragonal ZrO2 has been attempted based on the atomistic theory of diffusion using the electronic structures, phonon vibration spectrum combing the transition state theory (TST). A local harmonic approximation (LHA) that captures the most important vibrations adjacent to the migrating atom is proposed in the present work to deal with the dynamic instability of tetragonal ZrO2 which is stable above 1478K, the absolute values of correlation factors, atom jump frequencies along a-axis and c-axis directions for a tetragonal lattice have been evaluated respectively. Together with the calculated vacancy concentration, the oxygen self-diffusion coefficients along a-axis and c-axis as the functions of temperature and oxygen partial pressure are obtained for tetragonal ZrO2, which shows that the calculated values with a partial oxygen pressure of 10-15 atm compares well with the available experimental measurements in ZrO2.

  • 4. RUHR-Symposium Funktionale Materialien für Batterien

    Garrelt Duin, Minister für Wirtschaft, Energie, Industrie, Mittelstand und Handwerk des Landes Nordrhein-Westfalen, Dr. Jürgen Hambrecht, Vorsitzender des Aufsichtsrats der BASF SE, Dr. Werner Müller, Vorsitzender des Vorstands der RAG Stiftung und Vorsitzender des Aufsichtsrats der Evonik Industries AG, PD Dr. habil. Hartmut Wiggers, CENIDE, Universität Duisburg-Essen, Chong-Jo Cha, Leader of Development, LG Chem Europe GmbH, Prof. Dr.-Ing. Arno Kwade, Institut für Partikeltechnik, Technische Universität Braunschweig, Dr. Andreas Docter , Director of eDrive Components, Daimler AG, Dr. Oliver Schauerte , Leiter Werkstoffkunde in der Konzernforschung, Volkswagen AG, Christoph Fehrenbacher, Executive Director European Tech Center, A123Systems GmbH, Dr. Jong Han Rhee, Vice President, Samsung SDI Europe GmbH, Prof. Dr. Ferdi Schüth, Direktor am Max-Planck-Institut für Kohlenforschung und Vizepräsident der Max-Planck-Gesellschaft
    12th. October 2017, Symposium, Fraunhofer-inHaus-Zentrum Forsthausweg 1 47057 Duisburg

    Time:
    Start: 12th. October 2017 08:45 a.m.
    End: 12th. October 2017 05:30 p.m.

    Das Nano-Forschungszentrum NETZ/CENIDE der Universität Duisburg-Essen veranstaltet gemeinsam mit dem CAR-Center Automotive Research und der D+S Automotive das jährlich stattfindende RUHR-Symposium. Mit dem RUHR-Symposium wollen wir die Zusammenarbeit von Industrie und Forschung vertiefen und eine Art Tauschbörse für Ideen und Innovationen im Bereich der Funktionalen Materialen schaffen. Die Industrie und deren Spitzenmanager – /Entwickler treffen auf Spitzenforschung und diskutieren von der Materialebene bis in zur Anwendung aktuelle Facetten bei funktionalen Materialien.

    http://www.ruhr-symposium.de/

  • Nanostructured Inorganic and Hybrid Materials for Energy Conversion

    Harun Tüysüz, Ruhr-Universität Bochum
    9th. October 2017, Antrittsvorlesung, Ruhr-Universität Bochum, NC 02/99

    Time:
    Start: 9th. October 2017 01:00 p.m.
    End: 9th. October 2017 02:00 p.m.

    http://www.chemie.rub.de/

  • Microstructural Functionality at the Nanoscale

    Christopher Schuh, MIT, Bilge Yildiz, MIT, Jamie Warner, Oxford U, Marika Schleberger, UDE, Michel Barsoum, Drexel U, Florian Banhart, U de Strasbourg, Jerry Tersoff, IBM, Rajiv Kalia, USC, Wilfred van der Wiel, U Twente, Richard J. Todd, Oxford U, Olivier Guillon, FZ Jülich, Erik Bakkers, TU Eindhoven, Dmitry Turchinovich, UDE
    4th. October 2017, Workshop, Lecture Hall MD 162, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 4th. October 2017 08:00 a.m.
    End: 6th. October 2017 02:00 p.m.

    This international workshop is intended to foster the interdisciplinary exchange of ideas between researchers in engineering, physics and chemistry on microstructural dynamics. The topic of MiFuN is the time dependence of structural features at the nanoscale, a recent research development that is expected to have a strong impact on nanoscience and technology. Mechanisms for microstructural evolution range from the formation of defects, their transport, growth and transformation, to segregation, sintering and cooperative mechanisms including the controlled manipulation of grain boundaries and other microstructural elements in nanocrystalline materials. These mechanisms can lead to novel dynamic functionality, such as resistive switching or self-healing and are also determining the lifetime of nanostructured devices. In 2017 the focus will be placed on mechanisms in inorganic 1D and 2D systems.

  • SEPTEMBER 2017
  • Catalysis for Sustainable Chemical Energy Conversion CSCEC

    tba,
    17th. September 2017, 1st IMPRS RECHARGE SCIENTIFIC SYMPOSIUM 2017, Seminarraum 2.42, NanoEnergieTechnikZentrum NETZ, Carl-Benz-Straße 199, Campus Duisburg

    Time:
    Start: 17th. September 2017 02:00 p.m.
    End: 21st. September 2017 02:00 p.m.

    A global energy change is needed. Therefore, looking for solutions which are sustainable, environmentally friendly and cost-effective is indispensable. The chemical energy conversion as a way of facing the challenges related to the energy change, requires the development of efficient catalysts and the profound understanding of the underlying chemistry for processes like transforming light into electrical energy and energy storage for creating the next generations of fuel cells and electric-powered cars.

    https://cec.mpg.de/workshops/cscec2017/

  • Einführung in die mechanische Werkstoffprüfung

    Prof. Dr.-Ing. Frank Walther, TU Dortmund
    20th. September 2017, DGM-Fortbildung, Technische Universität Dortmund Maschinenbau III Baroper Str. 303 Einfahrt 41 D - 44227 Dortmund

    Time:
    Start: 20th. September 2017 09:00 a.m.
    End: 21st. September 2017 04:45 p.m.

    Zur Charakterisierung der mechanischen Eigenschaften von Konstruktionswerkstoffen sind u.a. die Prüfverfahren Zugversuch, Kerbschlagbiegeversuch und Härteprüfung grundlegend wichtige und häufig eingesetzte Methoden für die Qualitätskontrolle und -sicherung sowie die Werkstoffentwicklung und -optimierung. Diese Verfahren werden im Fortbildungsseminar theoretisch und praktisch behandelt, wobei es sich in erster Linie an Personen richtet, die in Betrieben der Metallherstellung und -verarbeitung im Rahmen der Eingangs-, Zwischen- und Endkontrolle die (zerstörende) mechanische Werkstoffprüfung durchführen oder betreuen, oder dies zukünftig zur Aufgabe haben. Angesprochen werden primär Personen, die in der Werkstoffprüfung nicht ausgebildet sind, oder die früher erworbene Kenntnisse auffrischen und vervollständigen wollen. Damit schließt der Kurs eine durch den Wegfall von Ausbildungsplätzen für Werkstoffprüfer/- innen entstandene Lücke in der Qualifizierung für eine Tätigkeit in mechanischen Werkstoffprüflaboren.

    https://www.dgm.de/veranstaltungen/fortbildungen/einfuehrung-in-die-mechanische-werkstoffpruefung/?tx_management_bookingstandardevent%5Btype%5D=flyer&tx_management_bookingstandardevent%5Bpk%5D=12ljcb21b2tbootrDo&tx_management_bookingstandardevent%5Baction

  • 5. VDI-Fachkonferenz Additive Manufacturing

    Prof. Dr.-Ing. habil. Gerd Witt, Universität Duisburg-Essen
    19th. September 2017, Konferenz, Haus der Unternehmer, Düsseldorfer Landstr. 7, 47249 Duisburg

    Time:
    Start: 19th. September 2017 08:45 a.m.
    End: 20th. September 2017 04:30 p.m.

    Die Fachkonferenz „Additive Manufacturing“ findet am 19. und 20. September in Duisburg statt. Der Fokus der Veranstaltung liegt auf dem Thema: Trends und Anwendungsbeispiele aus der industriellen Praxis. Informieren Sie sich über neue Möglichkeiten, Potenziale und Restriktionen additiver Fertigungsverfahren, Produktivitätssteigerung und wirtschaftliche Betrachtungen des Additiven Manufacturing sowie Generative Fertigungsverfahren im industriellen Einsatz. Thematische Fachvorträge zum Themenbereich Additive Fertigung als Produktionsverfahren runden die Fachkonferenz systematisch ab.

    http://www.vdi.de/additive

  • Oxygen Chemisorption on Surfaces Studied with a Spin- and Alignment-controlled O2 Beam and Non-adiabatic Effects during Metal Surface Oxidation

    Dr. Mitsunori Kurahashi, National Institute for Materials Science, Tsukuba, Japan, Prof. Dr. Hermann Nienhaus, Experimentalphysik, Fakultät für Physik, Universität Duisburg-Essen
    15th. September 2017, CENIDE Science Talk, NETZ, Seminarraum 2.42, Carl-Benz-Straße 199, Campus Duisburg

    Time:
    Start: 15th. September 2017 11:15 a.m.
    End: 15th. September 2017 01:05

  • DGM Regionalforum „Tailored Materials“

    Prof. Doru C. Lupascu, Universität Duisburg-Essen, Prof. Dr. Guillermo Requena, Institut für Werkstoffforschung, Deutsches Zentrum für Luft- und Raumfahrt, Prof. Dr. Hanno Gottschalk, Fachbereich Angewandte Mathematik– Stochastik, Bergische Universität Wuppertal, Dr. Gerhard Lackner, Verder Scientific ATM GmbH, Prof. Dr. Natalie Stranghöner, Institut für Metall- und Leichtbau, UDE, Dr. Ralf Bode, Dresser Rand Business, Siemens AG, Duisburg, Dr. Maren Hellwig, DGM, Dr. Bernd Janson, ZENIT GmbH, Moritz to Baben, GTT-Technologies, Jonas Ehrich, Institut für Technologien der Metalle – ITM, Werkstofftechnik, UDE
    4th. September 2017, Forum, Universität Duisburg-Essen, Raum S06 S00 B32 Universitätsstr. 2, 45141 Essen

    Time:
    Start: 4th. September 2017 12:30
    End: 5th. September 2017 12:15

    Das Forum am Montag soll mit dem Vortragsprogramm insbesondere Teilnehmer aus der Industrie ansprechen. Für den anschließenden Posterabend mit Empfang bitten wir die Standorte und Mitglieder des Regionalforums, sich in Form von Posterbeiträgen zu präsentieren.

    Am Dienstag gibt es dann einen kleinen Einblick in die Forschungsförderung von AiF, Stifterverband Metalle und ZENIT. Darüber hinaus erhalten junge MatWerker die Möglichkeit, sich mit Ihren neuen Ideen zu präsentieren. Nähere Details zum Programm entnehmen Sie bitte dem angehängten Programm.

    Bitte melden Sie sich unter folgendem Link an https://goo.gl/uGDevk

  • AUGUST 2017
  • 24th International Workshop on Industrial Crystallization

    Dr. Kerstin Wohlgemut,
    29th. August 2017, Workshop, nternational Meeting Center (IBZ) Emil-Figge-Str. 59 D-44227 Dortmund Germany

    Time:
    Start: 29th. August 2017 04:30 p.m.
    End: 31st. August 2017 02:30 p.m.

    Crystallization is an important separation and purification technique to produce a wide variety of substances with a particularly high purity. The focus in industry is set more and more on environmental and health aspects of chemical manufacturing leading to the demand of improved crystallization technologies. The International Workshop on Industrial Crystallization (BIWIC) brings together scientists and engineers from academia and industry, already experienced or beginners, to present and discuss their current work and also to identify new challenging research fields of industrial interest. The BIWIC 2017 offers an informal atmosphere for networking and meeting various institutions.

    http://www.apt.bci.tu-dortmund.de/cms/en/BIWIC2017/BIWIC_Flyer2017.pdf

  • Modular polymer particles for nano-bio investigations

    Dr. Markus Müllner, School of Chemistry, Key Centre for Polymers and Colloids, The University of Sydney
    23rd. August 2017, Vortrag, S05 T02 B02, Universitätsstr. 2, Campus Essen

    Time:
    Start: 23rd. August 2017 10:00 a.m.
    End: 23rd. August 2017 12:00

  • JULY 2017
  • Von metastabilen Verbindungen, Solarmaterialien, Photokatalysatoren und ungewöhnlichen Ionenleitern

    Prof. Dr. Martin Lerch , Technische Universität Berlin
    26th. July 2017, Kolloquium, S07 S00 D07, Universitätsstraße 7, Campus Essen

    Time:
    Start: 26th. July 2017 05:15 p.m.
    End: 26th. July 2017 06:45 p.m.

  • Eletronic structure and electron dynamics in two-dimensional dirac materials

    Prof. Dr. Philip Hofmann,, Department of Physics and Astronomy, University of Aarhus, Denmark
    25th. July 2017, Colloquium of the CRC 1242, Raum MG 272, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 25th. July 2017 10:00 a.m.
    End: 25th. July 2017 12:00

    Artificial two-dimensional (2D) materials, such as graphene or single-layer transition metal dichalcogenides, permit the realization of massless and massive Dirac fermions. A special feature of the 2D materials is that their electronic properties, for instance their band gap, can be strongly influenced by either their dielectric environment or by the excited carrier density in the material. Here we exploit this sensitivity to achieve a static and dynamic change in the electronic properties of 2D materials such as graphene and single layer WS2. This control of properties is demonstrated using scanning tunnelling microscopy and (time-resolved) angle-resolved photoemission spectroscopy.

  • Electronic structure and electron dynamics in two-dimensional dirac materials

    Prof. Dr. Philip Hofmann,, Department of Physics and Astronomy, University of Aarhus, Denmark
    25th. July 2017, Colloquium of the CRC 1242, Raum MG 272, Campus Duisburg, UDE

    Time:
    Start: 25th. July 2017 10:00 a.m.
    End: 25th. July 2017 12:00

    Artificial two-dimensional (2D) materials, such as graphene or single-layer transition metal dichalcogenides, permit the realization of massless and massive Dirac fermions. A special feature of the 2D materials is that their electronic properties, for instance their band gap, can be strongly influenced by either their dielectric environment or by the excited carrier density in the material. Here we exploit this sensitivity to achieve a static and dynamic change in the electronic properties of 2D materials such as graphene and single layer WS2. This control of properties is demonstrated using scanning tunnelling microscopy and (time-resolved) angle-resolved photoemission spectroscopy.

  • Autonomes Fahren

    Anne Stockem Novo, ZF TRW Automotive Holdings Corp
    24th. July 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 24th. July 2017 12:15
    End: 24th. July 2017 01:30 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Developing superionic polymers for battery and fuel cell applications

    Prof. Dr. Alexei P. Sokolov, Oak Ridge National Laboratory, USA
    18th. July 2017, colloquium, Hörsaal 2, Hörsaalgebäude II, TU Dortmund

    Time:
    Start: 18th. July 2017 04:30 p.m.
    End: 18th. July 2017 05:30 p.m.

    Use of polymer electrolytes in batteries and fuel cells can significantly improve their performance. However, the limiting factor for the broad use of polymer electrolytes remains their relatively low ion and proton conductivity. We present an overview of the relationship between ion and proton transport and structural relaxation in polymer electrolytes, including polymerized ionic liquids (PolyIL). Analysis of the data revealed a significant influence of ion size and chain flexibility on segmental dynamics and ion transport in PolyILs. Based on these studies we proposed a model that can describe the dependence of the glass transition temperature on ion size and chain flexibility. Employing the modified Walden plot analysis we identified ‘superionic’ behavior for many polymer electrolytes and PolyILs, and demonstrate that the decoupling of ionic transport from structural relaxation might be the best way to design polymers with high conductivity. This decoupling increases for smaller ions and for more rigid chains, and we ascribe the decoupling phenomena to frustration in polymer chain packing. Similar ideas can be applied to proton conductivity. We demonstrate significant decoupling of proton mobility from structural relaxation and/or viscosity in a series of protic ionic liquids.

    http://physik.tu-dortmund.de/cms/de/Fakultaet/Aktuelles/Kolloquium/index.html

  • Theoretical description of ARPES on the basis of the one-step model

    PD Dr. Jan Minar, University of Westbohemia, Plzen
    14th. July 2017, THEORIEKOLLOQUIUM, MC 351, Campus Duisburg, UDE

    Time:
    Start: 14th. July 2017 12:00
    End: 14th. July 2017 01:30 p.m.

    Various technical developments enlarged the potential of angleresolved photo-emission (ARPES) tremendously during the last one or two decades. In particular improved momentum, energy and spin resolution as well as the use of photon energies from few eV up to several keV makes ARPES a rather unique tool to investigate the electronic properties of solids and surfaces. These experimental developments need to be closely followed by corresponding theoretical description beyond simple interpretations like e.g. spectral function or DOS. Here, we present a generalization of the state of the art description of the photoemisison process, the so called one-step model that describes excitation, transport to the surface and escape into the vacuum in a coherent way. Within this approach we account for correlation effects by LSDA+DMFT, disorder by means of CPA. In this presentation, I will concentrate on the spin polarised surface states as probed by the ARPES such as topological surface states in Bi2Se3 and Bi2Te3, giant Rashba splitted bulk states in GeTe and their manipulation by using pump-probe spin resolved ARPES.

    http://www.theo-phys.uni-essen.de/tp/term/abstracts/Theo-Sem-SS17/minar.pdf

  • 10 Jahre Universitätsallianz Ruhr

    13th. July 2017, Festakt, Jahrhunderthalle Bochum

    Time:
    Start: 13th. July 2017 06:00 p.m.
    End: 13th. July 2017 09:00 p.m.

    Please register here;

    http://www.uaruhr.de/festakt

  • Domain walls and defects in multifunctional ferroelectrics: an ab initio based study

    Anna Grünebohm, Uninversität Duisburg-Essen
    13th. July 2017, ICAMS Special Seminar, ICAMS, IC 02-518, Ruhr-Universität Bochum

    Time:
    Start: 13th. July 2017 02:00 p.m.
    End: 13th. July 2017 03:00

    In ferroelectric oxides ferroic and structural degrees of freedom are strongly coupled to each other and to external stimuli such as an external electric field, stress, or temperature. The resulting piezoelectric, pyroelectric, and electrocaloric responses are promising for energy harvesting and novel cooling applications.

    However, the largest responses are found in the vicinity of the phase transitions typically far above room temperature. In this talk I report on different ways to optimize the responses by means of ab initio based molecular dynamics simulations. In particular, I will discuss the impact of epitaxial strain, different domain configurations, and defects.

  • The long way to steady state fusion plasmas - the superconducting stellarator device Wendelstein 7-X

    Prof. Dr. Thomas Klinger, Max-Planck-Institut für Plasmaphysik and University of Greifswald
    12th. July 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 12th. July 2017 01:00 p.m.
    End: 12th. July 2017 03:00 p.m.

  • Main group compounds for bond activation and catalysis

    Dr. G. I. Nikonov , FRSC. UK, Professor of Inorganic Chemistry
    6th. July 2017, Anorganisch-Chemisches Kolloquium, S07 S02 D48, Universitätsstraße 2, Campus Essen

    Time:
    Start: 6th. July 2017 02:00 p.m.
    End: 6th. July 2017 04:00 p.m.

    Vortrag von Dr. G. I. Nikonov (FRSC. UK, Professor of Inorganic Chemistry and Catalysis, Brock University, Ontario/CANADA) zum Thema: "Main group compounds for bond activation and catalysis"

  • Nanoporous gold: 3D structural analyses of RVEs and their implication on scaling relations of mechanical behavior

    Dr. Erica Lilleodden, Helmholtz-Zentrum Geesthacht
    6th. July 2017, ICAMS-IfM Seminar, IC 03-606, Ruhr-Universität Bochum

    Time:
    Start: 6th. July 2017 04:00 p.m.
    End: 6th. July 2017 06:00 p.m.

  • Measuring electronic structure in 4 dimensions – A new approach to photoemission

    Prof. Dr. Gerd Schönhense, Johannes Gutenberg-Universität Mainz
    4th. July 2017, colloquium, Hörsaal 2, Hörsaalgebäude II, TU Dortmund

    Time:
    Start: 4th. July 2017 04:30 p.m.
    End: 4th. July 2017 00:00

    The electronic structure of solids is a key element in materials research and –design. All transport and thermodynamical quantities of the electron system of a material depend on the Fermi surface and velocity vF; band dispersions determine optical and semiconducting properties. The experimental method of choice is angular-resolved photoemission (ARPES). A new approach to “multidimensional ARPES” (termed momentum microscopy) recently achieved orders of magnitude higher data throughput than conventional ARPES. High-resolution imaging of the Fourier plane of a cathode lens is combined with time-of-flight (ToF) energy recording, yielding maximal parallelization. The (kx,ky)-field of view exceeds the first Brillouin zone, the energy range comprises several eV. Tunable soft X-rays allow variation of kz (perpendicular to the surface) via direct transitions to freeelectron-like final states. This combination of concepts from microscopy and spectroscopy yields the 4D spectral density function r (EB;k) (weighted by the photoemission cross section) with ~108 resolved data points. Fermi surface and velocity distribution vF(kF), all band dispersions, electron or hole conductivity, effective mass and inner potential are obtained from r by simple algorithms. An imaging spin filter gives access to the spin texture.

    http://physik.tu-dortmund.de/cms/de/Fakultaet/Aktuelles/Kolloquium/index.html

  • Lehre in den Natur- und Ingenieurwissenschaften wirkungsvoll gestalten – Ein empirischer Ansatz

    Christian Kautz, TU Hamburg
    3rd. July 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 3rd. July 2017 12:15
    End: 3rd. July 2017 01:30 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Quantifizierung von Eicosanoiden und anderen Oxylipinen in biologischen Proben mittel LC-MS: Analytische Herausforderungen und Lösungsstrategien

    Prof. Dr. Nils Schebb, University of Wuppertal
    3rd. July 2017, Analytisch-chemisches Kolloquium, S05 T02 B02, Universitätsstraße 5, Campus Essen

    Time:
    Start: 3rd. July 2017 04:00 p.m.
    End: 3rd. July 2017 06:00 p.m.

  • JUNE 2017
  • Nanostructured surfaces inspired by nature

    Hendrik Hölscher, Institute of Microstructure Technology, Karlsruhe Institute of Technology
    29th. June 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04-408

    Time:
    Start: 29th. June 2017 04:00 p.m.
    End: 29th. June 2017 06:00

    Ruhr-Universität Bochum, IC 04-408

  • Layer-engineered inorganic-organic hybrid materials by ALD/MLD.

    Maarit Karppinen, Aalto University, Finland
    29th. June 2017, Interdisciplinary Lecture Series, Ruhr-Universität Bochum, HNC 30

    Time:
    Start: 29th. June 2017 05:00 p.m.
    End: 29th. June 2017 06:00 p.m.

    Inorganic-organic hybrid materials have the capacity– once carefully designed and fabricated – to exhibit tailored combinations of properties traditionally seen for inorganics or organics separately, and even beyond. An elegant, yet industrially feasible way to realize this is to combine the state-of-the-art gas-phase thin-film deposition technique of inorganics, i.e. ALD (Atomic Layer Deposition), with the emerging MLD (Molecular Layer Deposition) technique for organics. The combined ALD/MLD technique enables the atomic/molecular layer-by-layer fabrication of inorganic-organic hybrid thin films through sequential self-limiting gas-surface reactions with high precision for the individual-layer and overall-film thicknesses and compositions. In this talk I will discuss our recent successes in synthesizing such fundamentally new types of layer-engineered hybrid materials within my ERC Advanced Grant Project.

    We now have ALD/MLD processes for a rich variety of hybrid materials with different inorganic (Al, Zn, Ti, Mn, Fe, Co, Cu, Li, Na, K, Mg, Ca, Sr, Ba, Eu, Er, etc.) and organic (allyl, aryl, pyridine, nucleobase, etc.) constituents. In particular, we have employed the ALD/MLD technique to fabricate textile-integrated oxide-organic thin-film superlattice thermoelectrics in which the periodically introduced ultrathin organic layers between oxide layers hinder phonon transport,1-3 and demonstrated the first flexible and transparent Li-ion/organic microbattery.4,5 Also discussed are the new directions foreseen for the ALD/MLD technique related to metal organic framework (MOF) and guest-accessible coordination-framework materials,6-9 and new exciting luminescence phenomena.

  • Towards a predictive theory of dynamical processes in nanostructures

    Prof. Dr. Gabriel Bester, Universität Hamburg, Institut für Physikalische Chemie
    28th. June 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 28th. June 2017 01:00 p.m.
    End: 28th. June 2017 03:00 p.m.

  • Majorana Bound States in Topological Insulators and Dirac Semimetals

    Prof. Dr. Alexander Brinkman, University of Twente, Niederlande
    26th. June 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 26th. June 2017 12:00
    End: 26th. June 2017 01:00 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Low energy structural excitations in amorphous solids, and their role in relaxation and plasticity

    Dr. Peter Derlet, Paul Scherrer Institute, Villigen Switzerland
    22nd. June 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04-408

    Time:
    Start: 22nd. June 2017 04:00 p.m.
    End: 22nd. June 2017 04:00 p.m.

  • Combustion, crude oil, coffee roasting and aerosols: Analysis of complex materials and thermal processes by photo ionsation mass spectrometry (PIMS)

    Prof. Dr. Ralf Zimmermann, Universität Rostock
    21st. June 2017, Kolloquium, Fresenius Lecture, S07 S00 D07, Universitätsstraße 2, Campus Essen

    Time:
    Start: 21st. June 2017 05:15 p.m.
    End: 21st. June 2017 05:45 p.m.

  • Ultrafast nonlinear optics in the mid-infrared: from laser filaments to electron wave-packet dynamics in solids

    Prof. A. Zheltikov, Moskau University
    20th. June 2017, Colloquium of the CRC 1242, MG 272, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 20th. June 2017 10:00 a.m.
    End: 20th. June 2017 12:00

  • The Quest for Solving Quantum Chromodynamics: The Tensor Network Approach

    Karl Jansen, DESY, Zeuthen
    19th. June 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 19th. June 2017 12:15
    End: 19th. June 2017 01:30 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Iron under Extreme Conditions

    Prof. Dr. Ronald Cohen, Ludwig-Maximilians-University Munich, Department of Earth and Environmental Sciences
    14th. June 2017, Physikalisches Kolloquium, Hörsaal MC 122, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 14th. June 2017 01:00 p.m.
    End: 14th. June 2017 03:00 p.m.

    We are performing first-principles studies of transport properties, equations of state, and phase equilibrium in solid and fluid iron and iron-hydrogen mixtures under extreme conditions using density functional theory (DFT) and dynamical mean field theory (DMFT). For transport proper-ties we are using a combination of density-functional perturbation theory (DFPT) with the ABINIT package, first-principles molecular dynamics (FPMD) with QUANTUM ESPRESSO, KKR-CPA, and DMFT. We find that lower pressure (100 GPa) results agree well with experiments, but deviate with increasing pressure and temperatures, suggesting difficulties in extreme condition experiments and with experimental extrapolations. We get good agreement with other theoretical studied when making the same approximations. We will discuss the effects of including saturation effects and higher-order effects that come into play at high temperatures. We are also studying equations of state of Fe-H fluids at extreme conditions to understand giant planetary cores includeing Jupiter and exoplanets. We have performed FPMD for Fe-H systems within DFT up to 30,000 K and 4 TPa. We find complete miscibility in Fe-H fluids at extreme conditions, and non-ideaility is rather small. Simulations for pure iron at high P and T are also being performed to help interpret experiments at the National Ignition Facility (NIF) including ramp compression in the solid phase to very high P and T. This work is supported by the European Research Council (ERC) advanced grant ToMCaT, Theory of Mantle, Core, and Technological Materials.

  • Organochalcogen Catalyzed Aerobic Redox Dehydration

    Prof. Dr. Lanny S. Liebeskind, Emory University
    12th. June 2017, Organisch-Chemisches Kolloquium, S05 T02 B02, Universitätsstraße 7, Campus Essen

    Time:
    Start: 12th. June 2017 11:15 a.m.
    End: 12th. June 2017 01:00 p.m.

  • First Principles Calculations for Materials with Strong Electronic Coulomb Correlations – Where Do We Stand?

    Silke Biermann, Ecole Polytechnique, Palaiseau Cedex, France
    12th. June 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 12th. June 2017 12:15
    End: 12th. June 2017 01:30 p.m.

    Engineering novel materials with predefined properties is the dream of computational materials scientists. Systems with strong electronic Coulomb interactions are particularly prone to a high tunability of relevant properties. Designing computational tools to deal with correlated electron systems in a materials - specific manner is thus a key step for pushing forward nowadays predictive capabilities. In this talk, we review current strategies of combining dynamical mean-field techniques with electronic structure theory, with illustrations on d- and f-electron systems. In the second part, we will discuss current open questions and challenges, and describe further perspectives on the way to truly predictive many-body theories.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • 15. Duisburger KWK-Symposium

    tba.,
    8th. June 2017, Symposium, inHaus-Zentrum der Fraunhofergesellschaft, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 8th. June 2017 10:30 a.m.
    End: 8th. June 2017 05:30 p.m.

    Das 15. Duisburger KWK-Symposium findet am 08.06.2017 im inHaus-Zentrum der Fraunhofergesellschaft statt. Veranstalter sind der Lehrstuhl Energietechnik (Frau Prof. Heinzel) der Universität Duisburg-Essen und der Bundesverband Kraft-Wärme-Kopplung e.V. (B.KWK). Das Programmschema ist traditionell zweigeteilt, vormittags stehen politische und wirtschaftliche Rahmenbedingungen im Vordergrund (inkl. einer Podiumsdiskussion) und nachmittags gibt es vier Fachvorträge zu den Themenbereichen "kommunale KWK/Fernwärme", "Mikro-KWK/Objektversorgung", "industrielle KWK" und "Biomasse-KWK", die das breite Spektrum der KWK widerspiegeln.

    https://www.uni-due.de/kwk/

  • 3D Printing of Complex Microoptics – Merging with Plasmonic Nanooptics

    Prof. Dr. Harald Giessen, 4th Physics Institute, University of Stuttgart
    7th. June 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstr. 1, Campus Duisburg

    Time:
    Start: 7th. June 2017 01:00 p.m.
    End: 7th. June 2017 03:00 p.m.

  • Efficient thermoelectric heat engine and Seebeck diode based on superconductor quantum dot hybrid

    Dr. Sun-Yong Hwang, Universität Duisburg-Essen
    2nd. June 2017, Theoriekolloquium, MC 351, Campus Duisburg, Universität Duisburg-Essen

    Time:
    Start: 2nd. June 2017 12:00
    End: 2nd. June 2017 01:30 p.m.

    Superconductivity has been an intriguing topic since the first discovery in 1911. Recent interests also include creating thermoelectric power and enhancing the heat engine efficiency. Superconductors would be excellent candidates for generating thermoelectric effects since they are perfect electric conductors but poor thermal conductors deviating from the conventional Wiedemann- Franz law. Nevertheless, the superconducting density of states exhibits particle-hole symmetry suppressing the thermopower generation. Therefore, a way to break this symmetry should be devised for thermoelectric applications. We suggest that superconductor-quantum dot hybrid setup can pave the way for versatile thermoelectric devices. When attached to a ferromagnet, this system can act as a thermoelectric engine with a large figure-ofmerit ZT. Moreover, nonlinear thermocurrents of this device show strong Seebeck and spin Seebeck diode effects with high rectification efficiencies. Finally, in the subgap Andreev transport, interesting cross coupling effects can appear uniquely in the nonlinear regime. Importantly, transport properties of this device can be easily tunable by a gate potential or a magnetic field applied to the quantum dot.

  • MAY 2017
  • Quantum resonances in cold collisions

    Prof. Dr. Christiane Koch, Universität Kassel
    31st. May 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 31st. May 2017 01:00 p.m.
    End: 31st. May 2017 03:00 p.m.

  • Activating the Molecular Spinterface

    Mirko Cinchetti, TU Dortmund
    29th. May 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 29th. May 2017 12:15
    End: 29th. May 2017 01:30 p.m.

    The miniaturization trend in the semiconductor industry has led to the understanding that interfacial properties are crucial for device behaviour. Spintronics has not been alien to this trend, and phenomena such as preferential spin tunnelling, the spin - to - charge conversion due to the Rashba – Edelstein effect and the spin – momentum locking at the surface of topological insulators have arisen mainly from emergent interfacial properties, rather than the bulk of the constituent mater ials. In this talk I will describe inorganic/molecular interfaces by looking closely at both sides of the interface. I will discuss recent developments in the field and underline how molecular materials have arisen as an ideal platform for creating interfa cial spin effects. As an example, I will show that the extreme multi - functionality of organic molecules can be used to functionalize the spin properties of surfaces with a spin - texture induced by strong spin - orbit coupling. I will present our results o n the following two - dimensional electronic systems: the surface states of the topological insulator Bi2Se3, and the Rashba - split surface states of a Pb - Ag surface alloy. Finally, I will discuss the key role that molecular interfaces may play in the development of a new generation of spin - based technologies, thanks to their unique capability of being actively tuned to reach as - yet unexplored functionalities.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • A New Kilogram in 2018:The Biggest Revolution in Metrology since the French Revolution

    Prof. Dr. Klaus von Klitzing, Max-Planck-Institut für Festkörperforschung, Stuttgart
    24th. May 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 24th. May 2017 01:00 p.m.
    End: 24th. May 2017 03:00 p.m.

  • Direct Views of the Nano-Bio Interface

    Prof. Dr. Franz M. Geiger , Northwestern Universtiy Illinois USA
    24th. May 2017, Kolloquium, S07 S00 D07, Universitätsstraße 2, Campus Essen

    Time:
    Start: 24th. May 2017 05:15 p.m.
    End: 24th. May 2017 06:45 p.m.

  • Small Molecule Activation by Unsaturated Heavier Maingroup Systems

    Prof. Dr. David Scheschkewitz, Universität des Saarlandes
    22nd. May 2017, Anorganisch-Chemisches Kolloquium, Raum S03 V00 E71, Universitätsstraße 2, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 22nd. May 2017 05:15 p.m.
    End: 22nd. May 2017 06:30 p.m.

  • Small Molecule Activation by Unsaturated Heavier Maingroup Systems

    Prof. Dr. David Scheschkewitz , Universität des Saarlandes
    22nd. May 2017, Anorganisch-Chemisches Kolloquium, S03 V00 E71, Universitätsstraße 2, Campus Essen

    Time:
    Start: 22nd. May 2017 05:15 p.m.
    End: 22nd. May 2017 06:45 p.m.

    Vortrag von Prof. Dr. David Scheschkewitz (Universität des Saarlandes) zum Thema: "Small Molecule Activation by Unsaturated Heavier Maingroup Systems"

  • Axion Electrodynamics of Topological Materials

    Flavio Nogueira, Ruhr-Universität Bochum
    22nd. May 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 22nd. May 2017 12:00
    End: 22nd. May 2017 01:30 p.m.

    The electromagnetic response of topological states of matter typically features a so called axion term in the effective Lagrangian. This term is a topologically invariant and leads to new physically interesting effects in topological insulators, superconductors, and Weyl semimetals. In this talk we will discuss the physical consequences of the axion electrodynamics in heterostructures involving topological insulators, ferromagnets, and type II superconductors. One interesting specific example that will be discussed is the one of a topological insulator vertical Josephson junction. Due to the axion term a magnetic field applied perpendicular to the junction makes the vortex lines become the source of electric fields, leading in this way to a vortex - driven ac Josephson effect. This yields an example where the vortices become charged, carrying a fractional charge. This effect is a kin of the so called Witten effect, which predicts that in an axionic system magnetic monopoles acquire a fractional electric charge. This Josephson - Witten effect open s possibilities to electrically manipulate vortices via topological currents, which can in turn be used to create new devices. We briefly discuss the prospects of using these charged vortices as anyons and the possibility of braiding them for quantum computation.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Vom Partikel zur komplexen Struktur

    Prof. Dr. Vanessa Wood , ETH Zürich, Dr.-Ing. Niels Benson , Universität Duisburg-Essen
    18th. May 2017, CENIDE Science Talk, Veranstaltungsort ist der Seminarraum 2.42 im NanoEnergieTechnikZentrum (NETZ) am Campus Duisburg (Carl-Benz-Str. 199, 47057 Duisburg).

    Time:
    Start: 18th. May 2017 04:15 p.m.
    End: 18th. May 2017 06:15 p.m.

    Als Gastrednerin begrüßen wir Prof. Dr. Vanessa Wood vom Laboratory for Nanoelectronics an der ETH Zürich (Schweiz). Im Anschluss spricht Dr.-Ing. Niels Benson aus der Nanostrukturtechnik der Fakultät für Ingenieurwissenschaften an der UDE.

    Gastrednerin Professor Dr. Vanessa Wood referiert über Techniken auf Basis von Nanopartikeln in Lösung oder Suspensionen, die es ermöglichen, Bauteile skalierbar und kostengünstig zu fertigen („Understanding and Optimizing Solution-Processed Systems“). Anhand zweier Beispiele stellt sie vor, wie ihre Arbeitsgruppe Neutronen, Elektronen und Photonen verwendet, um Strukturen auf verschiedenen Längenskalen zu charakterisieren und Hinweise auf die Grenzen lösungsbasierter Systeme zu erhalten. Bevor sie das Laboratory for Nanoelectronics an der ETH leitete, forschte Wood im Fachbereich Materialwissenschaften des Massachusetts Institute of Technology (MIT) über neuartige Lithium-Ionen-Batteriesysteme. Promoviert wurde sie von der Abteilung für Elektrotechnik und Informatik am MIT. Wood ist Chair der Gordon Research Conference Nanomaterials for Applications in Energy Technology 2019.

    Als themenverwandtes CENIDE-Mitglied trägt Dr.-Ing. Niels Benson aus der Nanostrukturtechnik vor. Er setzt seinen Schwerpunkt auf die Strukturbildung von Silizium-Nanopartikeln während der Lasermodifikation: Wie erreicht man Mikrostrukturen, wie kompakte Schichten? („Solid Thin Films or μ-Structures? The Film Formation of Si Nanoparticles During Laser Modification“). Benson ist Arbeitsgruppenleiter in der Nanostrukturtechnik der UDE und erforscht Dünnfilmelektronik unter anderem im Hinblick auf Photovoltaik und RFID-Technik. Promoviert wurde er in den Materialwissenschaften an der TU Darmstadt.

    Nach den Vorträgen laden wir Sie zu einem kleinen Imbiss sowie zum Austausch untereinander und mit den Referenten ein. Ihre Anmeldung schicken Sie bitte bis zum 11. Mai an cenide@uni-due.de.

    Die etablierte Vortragsreihe „CENIDE Science Talk“ stellt das breite Themenspektrum innerhalb von CENIDE dar und erlaubt den Blick über den Tellerrand des jeweils eigenen Forschungsfeldes. Daher sind besonders Studierende und Promovierende sowie weitere Interessierte herzlich eingeladen!

    Weitere Informationen: Dr. Tobias Teckentrup 0203 379-8178 tobias.teckentrup@uni-due.de

    Redaktion: Birte Vierjahn, 0203/ 379-8176, birte.vierjahn@uni-due.de

    https://www.uni-due.de/cenide/sciencetalk.php

  • Oxide Quasicrystals: 2D Materials with strange Order

    Prof. Dr. Wolf Widdra, Institute of Physics, Martin-Luther-Universität, Halle-Wittenberg
    17th. May 2017, Physikalisches Kolloquium,

    Time:
    Start: 17th. May 2017 01:00 p.m.
    End: 17th. May 2017 03:00 p.m.

    Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

  • Polymere an die Kette gelegt - Blockcopolymere in beengten Räumen

    Prof. Dr. Andre Gröschel, Universität Duisburg-Essen
    17th. May 2017, Evonik Lecture, S07 S05 C43, Universitätsstraße 2, Campus Essen

    Time:
    Start: 17th. May 2017 05:15 p.m.
    End: 17th. May 2017 06:45 p.m.

    Antrittsvorlesung mit anschließenden Grillen, Bier und Bretzeln

  • Thermoelektrisches Energy Harvesting auf der Nanoskala

    Prof. Dr. Björn Sothmann, University of Duisburg-Essen
    16th. May 2017, colloquium, Hörsaal 2, Hörsaalgebäude II, TU Dortmund

    Time:
    Start: 16th. May 2017 04:30 p.m.
    End: 16th. May 2017 00:00

    In jüngster Zeit gibt es ein wachsendes Interesse an thermoelektrischen Effekten in mesoskopischenSystemen, die bei der Umwandlung von Abwärme in Elektrizität von Nutzen sein können. Ein besonderer Schwerpunkt liegt dabei auf der Energiegewinnung in Multi-Terminal-Setups. Solche Systeme erlauben einen gekreuzten Fluss von Wärme und Ladung und ermöglichen die Trennung der Wärmequelle vom eigentlichen Gleichrichter, wodurch Leckwärmeströmereduziert werden. Quantenpunkte sind vielverspre-chendeKandidaten für eine hocheffiziente Energie-gewinnung, weil sie als gute Energiefilter fungieren können. In diesem Vortrag werde ich verschiedene Energie-Harvesterauf der Grundlage von Quanten-punkten im Coulomb-Blockade-Regime, chaotischen Kavitäten und resonantem Tunneln durch Quanten-punkte diskutieren. Darüber hinaus werde ich aktuelle Arbeiten zur chiralenThermoelektrik mit Quanten-Hall-Rand-Zuständen vorstellen, die potentiell noch höhere Wirkungsgrade durch das Brechen der Zeit-umkehr-Symmetrie ermöglichen.

    http://physik.tu-dortmund.de/cms/de/Fakultaet/Aktuelles/Kolloquium/index.html

  • Physics of Afterglow Plasmas

    Tsanko Tsankov, Ruhr-Universität Bochum
    15th. May 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 15th. May 2017 12:15
    End: 15th. May 2017 01:30 p.m.

    Low -temperature plasmas are generally complex systems where heating, energy loss and transport are key aspects. The interaction among t he particles within the various ensembles in the plasma (electrons, ions and atoms) is mostly weak but the coupling between the different ensembles can be strong . Consequently, non - equilibrium distributions of particles are typical. Afterglow plasma s are characterized by the lack of energy input by external electromagnetic fi elds. Transport and cooling are decoupled from heating which reduce s the comple xity of the system. Interesting phenomena are for example evaporative cooling of electrons, population of highly excited Rydberg states and non - local distribution func tions of electrons and ions. In the talk the physics of these processes will be elucidated experimentally and theoretically.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Phase separation and demixing in a temperature gradient - experiments and simulation

    Markus Rettenmayr, Otto Schott Institute of Materials Research, Friedrich-Schiller-University Jena
    11th. May 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04 408

    Time:
    Start: 11th. May 2017 04:00 p.m.
    End: 11th. May 2017 04:00 p.m.

  • Wie verbrennt ein Brennstoff?

    Prof. Dr. Tina Kasper , Universität Duisburg-Essen
    10th. May 2017, Vortrag, Universität Duisburg-Essen Campus Duisburg, Raum MD 162

    Time:
    Start: 10th. May 2017 07:30 p.m.
    End: 10th. May 2017 09:00 p.m.

    Verbrennungsprozesse spielen für die Energiebereitstellung im Luft- und Straßenverkehr eine entscheidende Rolle. Die möglichst effiziente Nutzung, der bei der Verbrennung umgesetzten Energie, ist eines der vordinglichsten Ziele der modernen Verbrennungsforschung. Ein zweites wichtiges Ziel ist die Identifikation und Reduktion oder Nachbehandlung von Schadstoffen. Die Erforschung der Flammenchemie verschiedener Brennstoffe ist daher eine wichtige Grundlage für ein detailliertes wissenschaftliches Verständnis des Verbrennungsprozesses und eine Verbesserung der Prozessführung. In dem Vortrag wird die Vorgehensweise zur Beantwortung der Frage wie ein Brennstoff umgesetzt wird gezeigt. Zunächst werden Experimente vorgestellt, mit denen der chemische Ablauf der Verbrennung verfolgt werden kann. Anschließend wird gezeigt, wie die experimentellen Ergebnisse genutzt werden können, um theoretische Modelle für die Brennstoffumsetzung zu formulieren.

    https://www.uni-due.de/de/uni-colleg/2017_kasper.php

  • High Performance Computing and Industry

    9th. May 2017, ICAMS Advanced Discussions, Veranstaltungszentrum, Ruhr-Universität Bochum, Saal 1

    Time:
    Start: 9th. May 2017 09:00 a.m.
    End: 9th. May 2017 05:30 p.m.

  • Magnetische Oxide in neuem Licht

    Jun.-Prof. Dr. Martina Müller, TU Dortmund University
    9th. May 2017, colloquium, Hörsaal 2, Hörsaalgebäude II, TU Dortmund

    Time:
    Start: 9th. May 2017 04:30 p.m.
    End: 9th. May 2017 00:00

    Funktionale Oxide stehen im Fokus diverser Forschungsgebiete wie z.B. der Nano-, Spin- und Optoelektronik, ebenso wie der Katalyse, Batterieforschung oder Solarzellentechnologie. Im Bereich der Oxid-basieren Spinelektronik bietet die Integration magnetischer Oxide in funktionale Heterostrukturen spannende Möglichkeiten für zukünftige Konzepte in der Informationsverarbeitung und –speicherung. Einblicke in die magneto-elektronischen Eigenschaften magnetischer Oxide und neuartiger Hybridsysteme können durch den Einsatz von Synchrotron-basierter Photoemissionenspektroskopie gewonnen werden. Ausgehend von fundamentalen Erkenntnissen zum magnetischen Phasenübergang und der Austauschwechselwirkung in Heisenberg-Ferromagneten, werde ich auf spinabhängige Anwendungen, wie z.B. den Spin-Filter Effekt eingehen, sowie die Kontrolle magnetischer Eigenschaften auf atomarer Skala, z.B. in zweidimensionalen Elektronengasen oder an funktionalen Oxid-Grenzflächen.

    http://physik.tu-dortmund.de/cms/de/Fakultaet/Aktuelles/Kolloquium/index.html

  • Cloud Computing und Big Data Analysen

    Marcel Kunze, Universität Heidelberg
    8th. May 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 8th. May 2017 12:15
    End: 8th. May 2017 01:15 p.m.

    Im Vortrag wird dargestellt, wie sich aus der Kombination der beiden Felder "Cloud Computing" und "Bi g Data" Mehrwerte ergeben. Es werden zunächst die Grundlagen sowie das Wi rkungsfeld von „Cloud Computing “ beschrieben. Eine neue Ära der Datenanalyse eröffnet sich durch die Hinzunahme von Big Data Methoden: Können wir bessere Vorhersagen in Echtzeit gener ieren? Wie skalieren unsere Modelle mit den dramatisch anwachsenden Datenmengen? In einer Welt der multivariaten Messungen ist der Einsatz multivariater Analysemethoden optimal. Neben Diskriminantenanalyse und klassischen Clusteringverfahren gewinnt das ma schinelle Lernen zunehmend an Bedeutung: Mehrlagen - Perzeptrons können sich in einem selbst organisierenden Prozess an beliebige Wahrscheinlichkeitsdichtefunktionen anpassen; Im Vortrag werden exemplarisch Anwendungen in der Elementarteilchenphysik sowie mö gliche Anwendungen im Smart Home Bereich diskutiert.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Heat Assisted Magnetic Recording Technology - Background, Status and Future

    Dr. Dieter Weller, HGST/Western Digital, San Jose, CA
    3rd. May 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 3rd. May 2017 01:00 p.m.
    End: 3rd. May 2017 03:00 p.m.

  • APRIL 2017
  • Polymeric biomaterials for bone tissue engineering and stem cells of oral origin: current research trends and key milestones for clinical application

    Prof. Dr. Maria Chatzinikolaidou, University of Crete, Greece, Prof. Dr. Athina Bakopoulou, School of Density, Aristotle University of Thessaloniki, Greece
    28th. April 2017, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, S07 S02 D48

    Time:
    Start: 28th. April 2017 10:00 a.m.
    End: 28th. April 2017 11:30

    https://www.uni-due.de/chemie/aktuelles_vorträge_anorganisch_chemisches_kolloquium.shtml

  • Phase transformation phenomena in alloys produced by laser additive manufacturing.

    Eric Jägle, Max-Planck-Institut für Eisenforschung, Düsseldorf Germany
    27th. April 2017, ICAMS-IfM Seminar, Ruhr Universität Bochum IC 04-408

    Time:
    Start: 27th. April 2017 04:00 p.m.
    End: 27th. April 2017 06:00

  • Die Chemie der Energiewende: Katalyse mit CO2 und H2O als Schlüsseltechnik zur Energiespeicherung

    Prof. Dr. Malte Behrens, Universität Duisburg-Essen
    26th. April 2017, Vortrag, Universität Duisburg-Essen Campus Duisburg, Raum MD 162

    Time:
    Start: 26th. April 2017 07:30
    End: 26th. April 2017 09:00 p.m.

    https://www.uni-due.de/de/uni-colleg/

  • WGP Seminar Prozess-, Werkzeug- und Maschinenanalyse

    Prof. Dr.-Ing. Dirk Biermann, TU Dortmund
    25th. April 2017, Seminar, Technische Universität Dortmund Maschinenbau III Baroper Str. 303 Einfahrt 41 D - 44227 Dortmund

    Time:
    Start: 25th. April 2017 08:00 a.m.
    End: 26th. April 2017 04:00 p.m.

    In diesem Seminar sollen generelle Kenntnisse zur Anwendung der wesentlichen Messverfahren und Messtechniken für die werkstück- und werkzeugseitige Analyse vermittelt werden. Dazu zählen Kraft- und Temperaturmessungen, Schwingungsanalysen und Verschleißmessungen der Werkzeuge. Auf Basis der gewonnenen Erkenntnisse soll mit Hilfe dieses Seminars eine Sensibilisierung für aktuelle prozess- und bauteilspezifische Auswertemethoden erfolgen, um den Einsatz von Messtechnik in der Fertigung moderner Industrieunternehmen zu erhöhen und somit die Fertigungsqualität und die wirtschaftliche Bearbeitung zu verbessern

    http://www.isf.de/wgp_do2/index.html

  • Dortmunder Werkstoff-Forum

    Prof. Dr.-Ing. Frank Walther, TU Dortmund
    25th. April 2017, Forum, Technische Universität Dortmund Maschinenbau III Baroper Str. 303 Einfahrt 41 D - 44227 Dortmund

    Time:
    Start: 25th. April 2017 08:30 a.m.
    End: 26th. April 2017 04:00 a.m.

    Im Zeitalter von Hightech und Perfektion sind fehlerfreie Hochleistungsprodukte und individualisierte Fertigungs-strategien für viele Branchen unverzichtbar geworden. Die Datenbasis für die Entwicklung, Konstruktion und Fertigung liefert die Werkstoffprüftechnik mit modernen Mess- und Prüfverfahren sowie Analyse- und Auswertetechniken. Neben der Qualifizierung von Werkstoffkonzepten und der Optimierung von Fertigungsprozessen gewinnen Maßnahmen des Structural Health Monitoring zur Überwachung der strukturellen Integrität genauso an Bedeutung wie Ansätze zur zuverlässigen Berechnung der Restlebensdauer. Ohne fortschrittliche, maßgeschneiderte Werkstoffprüf- und -analyseverfahren sowie erstklassige Prüfkompetenz sind diese Innovationen undenkbar.

    http://wpt.mb.tu-dortmund.de/werkstoff-forum/de/home/index.php/

  • Parity - Time Symmetry and Exceptional Points in Optical Waveguides and Bose - Einstein Condensates

    Prof. Dr. Günter Wunner, Universität Stuttgart
    24th. April 2017, Physikalisches Kolloquium, HNB, Ruhr-Universität Bochum

    Time:
    Start: 24th. April 2017 12:00
    End: 24th. April 2017 02:00 p.m.

    Parity - time (PT) symmetric quantum mechanics ha s attracted ever - increasing attention over recent years because it offers a class of complex Hamiltonians which, in spite of their non - Hermiticity, can possess discrete real eigenvalue spectra. Moreover, these Hamiltonians feature the property of exception al points, i.e., points in parameter space where both energy values and eigenfunctions coincide, a phenomenon impossible in Hermitian quantum mechanics (but known to appear for resonances in the continuum).

    Because of the formal equivalence of the Schrödin ger equation and the Helmholtz equation of electrodynamics, the properties of such operators have meanwhile been observed in a multitude of classical laboratory experiments – e.g. optical waveguides, microwave resonators and metamaterials. A bona fide quan tum mechanical realisation of PT - symmetric systems is still lacking. A strong candidate is a Bose - Einstein condensate in a multi - well potential, or in a tilt ed optical lattice. The idea is to outcouple atoms from one well and incouple them coherently into the other. By numerically solving the underlying nonlinear Gross - Pitaevskii equation, but also by going beyond the mean - field description using Lindblad superoperators, I will demonstrate that PT - symmetric Bose - Einstein condensates with balanced gain and loss are indeed good candidates for the first observation of PT symmetry in a real quantum system.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Multi-optical concepts for solar cells

    Prof. Dr. Martina Schmid, Experimentalphysik (UDE)
    19th. April 2017, Physikalisches Kolloquium, Hörsaal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 19th. April 2017 01:00 p.m.
    End: 19th. April 2017 03:00 p.m.

  • Moderne Hochleistungswerkstoffe spanend bearbeiten

    Prof. Dr.-Ing. Dirk Biermann, TU Dortmund, Prof. Dr.-Ing. Werner Theisen, Ruhr-Universität Bochum, Dr.-Ing. Stefan Bergmann, Otto Fuchs KG
    4th. April 2017, Seminar, Institut für Spanende Fertigung Technische Universität Dortmund

    Time:
    Start: 4th. April 2017 09:00 a.m.
    End: 5th. April 2017 04:45 p.m.

    Das Fortbildungsseminar vermittelt die Grundlagen der Zerspanung und gibt einen Überblick über verschiedene Bearbeitungskonzepte moderner Werkstoffe. Neben den klassischen Verfahren wie Drehen, Bohren und Fräsen werden unter anderem das Mikrofräsen und auch neuartige Verfahren wie z. B. zur Bohrbearbeitung mit Schleifstiften erörtert. Ferner werden die unterschiedlichen Einflüsse auf den Zerspanprozess innerhalb verschiedener Anwendungsfelder der industriellen Praxis veranschaulicht. Ein wichtiges Element dieses Fortbildungsseminars sind Vorführungen von Zerspanprozessen zur Bearbeitung moderner Werkstoffe im Versuchsfeld des Instituts für Spanende Fertigung. Hierfür steht eine umfangreiche Ausstattung mit Werkzeugmaschinen für die Zerspanung und moderner Messtechnik zur Verfügung. Das Fortbildungsseminar richtet sich in erster Linie an Werkstoffwissenschaftler, Ingenieure und Techniker, welche im Bereich der Forschung und Entwicklung, sowie Fertigungstechnik tätig sind.

    https://www.dgm.de/index.php?id=1448

  • Nanoparticle imaging probes for molecular imaging with computed tomography

    Prof. Dr. Ryan Roeder, University of Notre Dame, USA
    3rd. April 2017, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, S05 T02 B02

    Time:
    Start: 3rd. April 2017 11:15 a.m.
    End: 3rd. April 2017 01:00 a.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_anorganisch_chemisches_kolloquium.shtml

  • MARCH 2017
  • Modelling and Simulation of Superalloys 2017, Workshop and Tutorials

    27th. March 2017, Workshop, Conference Centre, Ruhr-Universität Bochum

    Time:
    Start: 27th. March 2017 07:00 a.m.
    End: 31st. March 2017 05:00 p.m.

    Superalloys are multi-component materials with complex microstructures that offer unique properties for high-temperature applications. The complexity of the superalloy materials makes it particularly challenging to obtain fundamental insight into their behaviour from the atomic structure to turbine blades. Recent advances in modelling and simulation of superalloys contribute to a better understanding and prediction of materials properties and therefore offer guidance for the development of new alloys.

    This workshop will give an overview of recent progress in modelling and simulation of materials for superalloys, with a focus on single crystal Ni-base and Co-base alloys. Topics will include electronic structure methods, atomistic simulations, microstructure modelling and modelling of microstructural evolution, solidification and process simulation as well as the modelling of phase stability and thermodynamics.

    The workshop is organized by Jutta Rogal, Thomas Hammerschmidt and Ralf Drautz within the SFB/Transregio 103 Superalloy Single Crystals “From atoms to turbine-blades”.

    http://superalloys2017.rub.de/

  • Gas-phase Synthesis of Functional Nanomaterials: Fundamental Understanding, Modeling and Simulation, Scale-up

    Hai Wang, Stanford University, USA, Houston Miller, George Washington University, USA, Lutz Mädler, University of Bremen, Germany, Wolfgang Peukert, Friedrich-Alexander-University Erlangen-Nürnberg, Germany, Angela Violi, University of Michigan, USA, Emanuele Ghedini, University of Bologna, Italy, Amit Bhave, University of Cambridge, UK, Marc Leparoux, EMPA Swiss federal laboratories for materials science, Switzerland
    21st. March 2017, Symposium, University of Duisburg-Essen, NETZ – NanoEnergyTechnologyCenter, Carl-Benz-Str. 199, 47057 Duisburg, Germany

    Time:
    Start: 21st. March 2017 01:00 p.m.
    End: 22nd. March 2017 05:00 p.m.

    Gas-phase synthesis allows the production of a large variety of complex nanoparticles for various applications and is especially suited for scaling-up, already proven by several industrial processes. In this two-day international symposium at the UDE the fundamentals of particle formation and growth in relevant nanoparticle synthesis processes such as plasma and flame synthesis are presented. Furthermore, recent model-based approaches and simulation to predict synthesis processes and particle properties are discussed. Finally, the industrial-relevant scale-up of synthesis processes and possible applications of the produced nanomaterials are presented.

    This international symposium is organized within the frame of the Horizon 2020 project Nanomaterials via Gas-Phase Synthesis: A Design-Oriented Modelling and Engineering Approach (NanoDome) and the DFG research unit (FOR 2284 Model-based scalable gas-phase synthesis of complex nanoparticles.

    Registration (Deadline: March 5, 2017): Please go to the event's website and fill out the form on the page to register for the symposium. If you are interested in a contributed presentation, please send a title and an abstract to cenide@uni-due.de.

    https://www.uni-due.de/cenide/symposium_synthesis_2017.php

  • Anticancer and Angiogenic Applications of Nanomaterials

    Prof. Dr. Santiago Gómez-Ruiz, Universidad Rey Juan Carlos
    16th. March 2017, Kolloquium, TU Dortmund, Chemiegebäude, HS1, Campus Nord

  • Efficient kinetic-based computations for multiphase/multicomponent flows in modern energy systems

    Amin Safi, Paul Scherrer Institute, Villigen, Switzerland
    8th. March 2017, ICAMS Special Seminar, Ruhr-Universität Bochum IC 02-718

    Time:
    Start: 8th. March 2017 11:00 a.m.
    End: 8th. March 2017 12:30

    Since the advent of kinetic methods in early 1990s, the numerical communities in physics, applied mathematics and mechanical engineering have been actively assessing the capabilities of such schemes, the most popular of them being the lattice Boltzmann (LB) method, so as to establish their reliability as an alternative to classical CFD tools. Almost three decades later, kinetic approaches are now in a position to be applied with confidence to answer key questions in science and industry, offering high numerical accuracy, low coding complexity and an exceptional parallel scalability. Among various applications of interest in physics and engineering, in this talk, I would be focusing on some latest generations of LB-based technologies for multiphase and multicomponent flows as being actively used for current and upcoming energy-related projects at the Combustion Fundamentals Group (CFG) of the Paul Scherrer Institute. We start with a brief review over a new class of coupled LB-Level Set solvers for high density ratio, high deformation rate two phase systems. Moving towards more realistic energy systems, I will then introduce a recently developed tool to predict evaporation inside Polymer Electrolyte Fuel Cells (PEFC), where flow and mass transport must be realized at the micro-pores of gas diffusion layers in PEFCs. The last part of the talk would be dedicated to introducing our ongoing project on multiscale simulation of flow and surface reactions in methanation fluidized beds, where catalytic reactions take place inside and outside a swarm of porous catalytic particles at variable temperatures to convert the mixture of CO and hydrogen into the highly desirable methane fuel.

  • Surface modification through Dynamic Polymer Brush

    Prof. Dr. Hideaki Yokoyama , University of Tokyo, Department of Advanced Materials Science, Graduate School of Frontier Sciences
    7th. March 2017, Technisch-Chemisches Kolloquium, Universität Duisburg-Essen, Raum S05 T02 B02, Universitätsstraße 2, Campus Essen

    Time:
    Start: 7th. March 2017 03:00 p.m.
    End: 7th. March 2017 05:00 p.m.

  • Polymer-brush coatings for membrane fouling resistance – Towards theoretical design criteria

    Prof. Dr. Guy Ramon , Technion – Israel Institute of Technology, Department of Civil & Environmental Engineering, Haifa, Israel
    6th. March 2017, Technisch-Chemisches Kolloquium, Universität Duisburg-Essen, Raum S05 T03 B94, Universitätsstraße 2, Campus Essen

    Time:
    Start: 6th. March 2017 04:00 p.m.
    End: 6th. March 2017 06:00 p.m.

  • FEBRUARY 2017
  • Why to Develop Catalytic Nucleophilic Substitutions

    Dr. Peter Huy, Universität des Saarlandes
    9th. February 2017, Organisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, S05 T02 B02

    Time:
    Start: 9th. February 2017 04:15 p.m.
    End: 9th. February 2017 04:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_organisch_chemisches_kolloquium.shtml

  • Thermoelectric energy harvesting at the nanoscale

    Dr. Björn Sothmann, Universität Duisburg-Essen
    8th. February 2017, Physikalisches Kolloquium,

    Universität Duisburg-Essen

    Campus Duisburg

    Hörsaal MC 122

    Time:
    Start: 8th. February 2017 05:15 p.m.
    End: 8th. February 2017 06:30 p.m.

    Thermoelectric energy harvesting at the nanoscale

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Investigation of the γ’- strengthened Co-base alloys: Quaternary alloys Co-Al-W-Ta and multicomponent alloys

    Alexander Epishin, Institut für Werkstoffwissenschaften und -technologien, Metallische Werkstoffe, Technische Universität Berlin, Berlin Germany
    2nd. February 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 2nd. February 2017 04:00 p.m.
    End: 2nd. February 2017 05:00 p.m.

    http://www.icams.de/content/events/?filter=ICAMS-IFM

  • Advanced spin-resolved momentum microscopy

    Dr. Christian Tusche, Forschungszentrum Jülich
    1st. February 2017, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 1st. February 2017 05:15 p.m.
    End: 1st. February 2017 06:30 p.m.

    Advanced spin-resolved momentum microscopy

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • JANUARY 2017
  • Nano- und mikrooptische Konzepte für Chalkopyrit-Solarzellen

    Prof. Dr. Martina Schmid, Helmholtz-Zentrum Berlin für Materialien und Energie
    31st. January 2017, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MD 164

    Time:
    Start: 31st. January 2017 05:15 p.m.
    End: 31st. January 2017 07:00 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Übergangsmetallkomplexe als zentrale Elemente nachhaltiger chemischer Prozesse

    Prof. Dr. Matthias Bauer, Uni Paderborn
    30th. January 2017, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, Raum S03 V00 E71

    Time:
    Start: 30th. January 2017 05:15 p.m.
    End: 30th. January 2017 06:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_anorganisch_chemisches_kolloquium.shtml

  • Ultrafast soft x-ray spectroscopy and scattering

    John Freeland, Argonne National Laboratory, USA, John Rehr, University of Washington, USA, Theo Rasing, Radboud University Nijmegen, Netherlands, Andrei Rogalev, ESRF, Grenoble, France, Andreas Scherz, XFEL, Hamburg, Germany
    27th. January 2017, International Symposium, University of Duisburg-Essen, NETZ 2.42, Campus Duisburg, Carl-Benz-Str. 199, 47057 Duisburg

    Time:
    Start: 27th. January 2017 01:30 p.m.
    End: 27th. January 2017 07:00 p.m.

    The Collaborative Research Center 1242 and CENIDE – Center for Nanointegration Duisburg-Essen at the University of Duisburg-Essen host the international symposium on ultrafast soft x-ray spectroscopy and scattering.

    Registration is requested until January 20, 2017: CRC 1242, Dr. Nora Dörmann, nora.doermann@uni-due.de

  • Selective Electron Beam Melting: A powder bed based additive manufacturing technology for high performance alloys

    Carolin Koerner, Department of Materials Science and Engineering, Materials Science and Engineering for Metals, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen Germany
    26th. January 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 26th. January 2017 04:00 p.m.
    End: 26th. January 2017 05:00 p.m.

    http://www.icams.de/content/events/?filter=ICAMS-IFM

  • Analogs for Horizons

    Prof. William Unruh, UBC - The University of British Columbia,
    25th. January 2017, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 25th. January 2017 05:15 p.m.
    End: 25th. January 2017 06:30 a.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Elektrochemie - flexible Partnerin im Ensemble instrumenteller Analysenverfahren

    Frank Matysik, Universität Regensburg
    25th. January 2017, Analytisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, S07 S00 D07

    Time:
    Start: 25th. January 2017 07:00 p.m.
    End: 25th. January 2017 00:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_analytisch_chemisches_kolloquium.shtml

  • Recent progress of the study of phase transformation by CVM and PPM

    Prof. Dr. Tetsuo Mohri, Tohoku University, Sendai, Japan
    25th. January 2017, ICAMS Special Seminar, ICAMS Seminar room IC 02-718 Ruhr-Universität Bochum

    Time:
    Start: 25th. January 2017 11:00 a.m.
    End: 25th. January 2017 01:00 p.m.

    The cluster Variation Method has been regarded as one of the most reliable theoretical tools for the study of phase equilibria. By increasing the size of the basic cluster, the accuracy of the calculated free energy of the system is enhanced. Yet, one of the deficiencies of the conventional CVM is the fact that the local lattice relaxation is not accurately introduced into the free energy. This is because the local lattice distortion changes the crystal symmetry at each lattice point and CVM entropy formula is not fully rationalized. In order to improve such inconvenience, Continuous Displacement Cluster Variation Method (CDCVM) has been developed. Recently, it has been realized that the basic idea of CDCVM can be extended to deal with other internal freedom of an alloy such as magnetic momentum and collective atomic displacements, leading to magnetic and displacive phase transitions.

    Path Probability Method (PPM) is the natural extension of the CVM to the time domain and one can perform atomistic kinetic studies such as transition kinetics, relaxation kinetics and fluctuation spectra along the kinetic path. A major stumbling block of applying PPM to versatile alloy system, however, stemmed from the fact that atomic diffusion via vacancy mechanism demands tremendous number of variational parameters in formulating the path probability function (ppf) which is corresponding to free energy of the CVM. Recently, we developed a new algorithm of formulating ppf for vacancy mediated diffusion process by extending the basic idea of CDCVM, and we calculated the time evolution of Long Range Order parameter associated with the rapid-quenching of Ni3Al γ’ phase.

    In this talk, the overview of the phase transition studies by CVM, CDCVM and PPM is provided.

    For further information please contact suzana.g.fries@rub.de

    http://www.icams.de/content/events/

  • Power-to-Gas als Flexibilitätsoption im zukünftigen Energiesystem

    Dr. Johannes Schaffert, Gas- und Wärme-Institut Essen e.V.
    24th. January 2017, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MD 164

    Time:
    Start: 24th. January 2017 05:15 p.m.
    End: 24th. January 2017 07:00

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Iron-Based Superconductors on Topological Insulators investigated by Spin-Resolved Scanning Tunneling Spectroscopy

    Dr. Jens Wiebe, Universität Hamburg
    23rd. January 2017, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 23rd. January 2017 12:00
    End: 23rd. January 2017 01:00 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Omics Technologies, Food and Health: Foodomics

    Alejandro Cifuentes, University of Madrid
    23rd. January 2017, Analytisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, Seminarraum S05 T02 B02

    Time:
    Start: 23rd. January 2017 04:00 p.m.
    End: 23rd. January 2017 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_analytisch_chemisches_kolloquium.shtml

  • Magnetic and magnetoelectric smallscale robots

    Salvador Pané i Vidal, Department of Mechanical and Process Engineering, ETH Zurich, Switzerland
    23rd. January 2017, Hochschullehrernachwuchs-Kolloquium, Ruhr-Universität Bochum, NC 02-99

    Time:
    Start: 23rd. January 2017 01:00 p.m.
    End: 23rd. January 2017 02:00 p.m.

    http://www.chemie.rub.de/imperia/md/content/chemie/hln/hln-koll_ws_201617.pdf

  • Windenergie

    Lars Schnatbaum-Laumann, Energie.Agentur.NRW, Düsseldorf
    19th. January 2017, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 231

    Time:
    Start: 19th. January 2017 05:15 p.m.
    End: 19th. January 2017 07:00 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Drug Delivery via Cell Membrane Fusion using Lipopeptide Modified Liposomes

    Prof. Dr. Alexander Kros, University of Leiden
    19th. January 2017, Organisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, S05 T02 B02

    Time:
    Start: 19th. January 2017 04:15 p.m.
    End: 19th. January 2017 05:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_organisch_chemisches_kolloquium.shtml

  • The semiconductor spin qubit

    Prof. Dr. Richard J. Warburton, Universität Basel
    18th. January 2017, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 18th. January 2017 06:15 p.m.
    End: 18th. January 2017 06:30 a.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Selbstorganisierte Nanostrukturen

    Prof. Dr. Olli Ikkala, Aalto University, Finnland, Prof. Dr. André Gröschel, Universität Duisburg-Essen
    18th. January 2017, CENIDE Science Talk, Universität Duisburg-Essen
    NanoEnergieTechnikZentrum (NETZ) / Raum 2.42
    Carl-Benz-Str. 199
    47057 Duisburg

    Time:
    Start: 18th. January 2017 03:15 p.m.
    End: 18th. January 2017 05:15 p.m.

    "Hierarchical Templating for Biomimetics and Self-Assemblies Across the Length Scales"
    Prof. Dr. Olli Ikkala, Department of Applied Physics, Molecular Materials, Aalto University, Esppo, Finnland

    "Strength and Fracture Toughness of Self-Assembled Bulk Nanocomposites"
    Prof. Dr. André Gröschel, Physikalische Chemie, Fakultät für Chemie, Universität Duisburg-Essen

  • New dimensions in metal-organic chemistry

    Dr. Jonathan Foster, Department of Chemistry der University of Sheffield
    17th. January 2017, , TU Dortmund, Chemiegebäude, Hörsaal 1, Campus Nord

    Time:
    Start: 17th. January 2017 05:15 p.m.
    End: 17th. January 2017 06:15 p.m.

  • Non-Equilibrium Dynamics in Isolated Quantum Systems

    Prof. Dr. Masud Haque, Maynooth University, Irland
    16th. January 2017, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 16th. January 2017 12:00
    End: 16th. January 2017 01:00 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Methandiides and metalated ylides: Unique ligands in carbene and main group element chemistry

    Prof. Dr. Viktoria Däschlein-Gessner, RUB
    16th. January 2017, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, Raum S03 V00 E71

    Time:
    Start: 16th. January 2017 05:15 p.m.
    End: 16th. January 2017 06:15 p.m.

    Methandiides and metalated ylides: Unique ligands in carbene and main group element chemistry

    https://www.uni-due.de/chemie/aktuelles_vorträge_anorganisch_chemisches_kolloquium.shtml

  • Automated electron Diffraction Tomography (ADT): A key to complex structures of nano crystals

    Ute Kolb, Institut für Physikalische Chemie, Johannes Gutenberg-Universität Mainz, Mainz Germany
    12th. January 2017, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 12th. January 2017 04:00 p.m.
    End: 12th. January 2017 05:00 p.m.

    http://www.icams.de/content/events/?filter=ICAMS-IFM

  • Physikdidaktik – Forschung zwischen Anspruch und Wirklichkeit

    Prof. Dr. Hendrik Härtig, Universität Duisburg-Essen,
    11th. January 2017, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 11th. January 2017 05:15 p.m.
    End: 11th. January 2017 06:30 p.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Kann man Atome sehen?

    Prof. Dr. Rolf Möller , Universität Duisburg-Essen
    11th. January 2017, Uni-Colleg, Universität Duisburg-Essen, Campus Duisburg, Raum MD 162

    Time:
    Start: 11th. January 2017 07:30 p.m.
    End: 11th. January 2017 09:00 p.m.

    Die Vorstellung, dass die Materie aus einzelnen Atomen besteht, von denen es nur einige wenige Typen gibt, wurde schon von den Griechen um ca. 400 vor Christus formuliert. Seit etwa hundert Jahren gibt es verschiedene Experimente, die die Existenz einzelner Atome zeigen. Inzwischen können mit den Methoden der Rastersondenmikroskopie routinemäßig einzelne Atome auf einer Oberfläche sichtbar gemacht werden. In dem Vortrag wird ein Experiment gezeigt, bei dem einzelne Bariumatome an einer Spitze abgebildet werden können.

    https://www.uni-due.de/de/uni-colleg/2016-2017_moeller.php

  • Kernfusion

    Dr. Sebastijan Bresinzek, Forschungszentrum Jülich GmbH
    10th. January 2017, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MD 164

    Time:
    Start: 10th. January 2017 05:15 p.m.
    End: 10th. January 2017 07:00 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Exciton physics in atomically-thin semiconductors

    Dr. Alexey Chernikov , Universität Regensburg
    10th. January 2017, , TU Dortmund, HGII, HS2

    Time:
    Start: 10th. January 2017 04:30 p.m.
    End: 10th. January 2017 05:30 p.m.

    http://physik.tu-dortmund.de/cms/Medienpool/Kolloquium/WS-2016_2017/kolloquium_chernikov.pdf

  • Time-Resolved and Non-Linear Studies of Terahertz Quantum Cascade Lasers

    Dr. Nathan Jukam, Ruhr-Universität Bochum
    9th. January 2017, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 9th. January 2017 12:00
    End: 9th. January 2017 01:00 p.m.

    The terahertz (THz) frequency range has been historically under-developed due to a lack of practical sources. This is despite the fact that THz radiation can be used in many applications such as nondestructive testing, detection of illicit substances, and pharma-ceutical inspection. Furthermore, THz sources are of interest for fundamental science since many rotational and vibrational molecular transitions, as well as collective excitations in solid state systems, occur at THz frequencies. Due to their small size and potential for mass fabrication, quantum cascade lasers (QCLs) are promising sources of THz radiation. In contrast to interband laser diodes, in QCLs the laser transition takes place between intersubband levels. Since their realization [1] THz QCLs have shown considerable improvement in threshold current, operating temperature, power output, and low frequency operation.

    In the first half of this talk, I give an overview of how THz QCLs function. In the second half of the talk, I describe research activities at the Ruhr-Universität Bochum involving THz QCLs. First, I describe how injection seeding can be used to control the spectral emission of THz QCLs. The emission from QCLs is typically multi-mode. The spectral emission of a multi-mode laser can be controlled by injecting a tunable seed pulse into the laser cavity before the laser is turned on. Narrow-band THz seeds are generated by optical rectification of a femtosecond laser in a periodically poled lithium niobate (PPLN) crystal and are used to injection seed a THz QCL [2]. In addition, injection seeding with THz pulses whose bandwidth is much greater than the laser’s gain bandwidth is also investigated. For broad-band injection seeding, a single seed pulse has no effect on the seeded laser emission, since all longitudinal modes are simultaneously selected. However, double pulse injection seeding [3] can systematically modify the QCL spectra when the time delay between the two pulses is varied. Lastly, I discuss recent non-linear measurement on THz QCLs. By injecting two coherent THz pulses with a variable time-delay into a QCL, two-dimensional spectroscopy is performed. This permits the observation of a 2nd, 3rd, and 4th order non-linear response in the 2D spectra of the QCL. Sum frequency and second harmonic generation are directly detected in the emission spectra of a THz QCL. Both sum frequency generation and second harmonic generation are enhanced when a novel THz waveguide is used to enhance the internal laser field at the QCL facet.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • DECEMBER 2016
  • Elastic strain engineering based on quantum-mechanical calculations

    Martin Friak, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno Czech Republic
    15th. December 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 15th. December 2016 03:00 p.m.
    End: 15th. December 2016 00:00

    It is well known that stresses and strains in materials may result in stabilization of rather exotic phases that would otherwise not exist in strain-free bulk materials. For example, biaxial planar stresses acting within interface planes in multilayers can alter thermodynamic properties, structural parameters, elastic properties and/or magnetic and electronic state of thin layered materials very significantly. So-called elastic strain engineering is an approach that exploits these mechanisms to (i) fine-tune materials characteristics according to specific needs or (ii) stabilize new phases with unprecedented properties. Quantum-mechanical calculations represent an excellent tool to describe changes induced by not only small and moderate strains belonging to linear-elasticity regimes but also rather extreme strain levels. The talk will provide a few selected examples of the elastic strain engineering applied to different classes of materials including elemental metals, transition-metal nitrides and half-metallic transition-metal oxides. In particular, nano-scale superlattices containing metastable phases will be discussed as systems that are critically important for future development of advanced lamellar composites with application-dictated stiffness and hardness. Combining theoretical and experimental methods we focus on elastic properties of AlN/CrN superlattices in which CrN stabilizes AlN in a metastable B1 (rock salt) cubic phase in the form of nm-thin layers (New Journal of Physics 17 (2015) 093004).

    http://www.icams.de/content/events/?filter=ICAMS-IFM

  • Biomasse

    Oliver Jochum, Fraunhofer Institut UMSICHT, Oberhausen
    15th. December 2016, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 231

    Time:
    Start: 15th. December 2016 05:15 p.m.
    End: 15th. December 2016 07:00 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Stahlkonstruktionen im Wandel der Zeit

    Prof. Dr.-Ing. habil. Natalie Stranghöner , Universität Duisburg-Essen
    14th. December 2016, Uni-Colleg, Universität Duisburg Essen, Campus Duisburg, Raum MD 162

    Time:
    Start: 14th. December 2016 01:30 p.m.
    End: 14th. December 2016 02:30

    Der Einsatz des Werkstoffs Stahl im Bauwesen ermöglicht eine faszinierende Vielfalt an Konstruktionen des Hoch-, Brücken- und Ingenieurbaus. Gerade im Ruhrgebiet spiegelt sich der Wandel des Einsatzes von Stahl im Bauwesen in ganz besonderer Weise wider: Viele Objekte der Industriekultur sind „alte“ Stahlkonstruktionen, die zur weiteren Nutzung unter Verwendung aktueller Methoden umgebaut werden. Des Weiteren weist das Revier - u.a. aufgrund des großen Kanalnetzes - eine Vielzahl an interessanten alten und jüngeren Brückenbauten aus Stahl auf.

    Im Vortrag stellt Professorin Natalie Stranghöner die historische Entwicklung des Stahlbrückenbaus ausgehend vom Eisenbrückenbau des 18. Jahrhunderts dar. Zudem erläutert sie ausgewählte, besondere Tragwerke des Ruhrgebiets.

    https://www.uni-due.de/de/uni-colleg/2016-2017_stranghoerner.php

  • Sensing with Light: Chemically Modifying Optical Fibers

    Prof. Sean Barry, Carleton University, Canada
    14th. December 2016, Guest Lecture, Ruhr-Universität Bochum NC 3/99

    Time:
    Start: 14th. December 2016 12:00
    End: 14th. December 2016 01:00 p.m.

  • t.b.a. (Prof. Dr. Sonja Herres-Pawlis, RWTH Aachen)

    Prof. Dr. Sonja Herres-Pawlis, RWTH Aachen
    12th. December 2016, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, Raum S03 V00 E71

    Time:
    Start: 12th. December 2016 05:15 p.m.
    End: 12th. December 2016 06:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_anorganisch_chemisches_kolloquium.shtml

  • Arbeitskreis „Epitaxie von III/V-Halbeitern“

    Dr. Werner Prost, Deutsche Gesellschaft für Kristallzüchtung und Kristallwachstum
    8th. December 2016, Arbeitskreis, Sporthochschule Wedau in Duisburg

    Time:
    Start: 8th. December 2016 08:00 a.m.
    End: 9th. December 2016 01:15 p.m.

    Wenn mit höchster Effizienz Licht zu Strom oder energiesparend aus Strom in Licht gewandelt wird, dann geht es nur mit Solarzellen und Leuchtdioden aus speziellen Halbleitern. Hierzu sind Verbindungs-Halbleiter erforderlich, die sich aus Atomen der III. und V. Hauptgruppe zusammensetzen: die III/V-Halbeiter. Die Forschung an dieser Halbleiterklasse ist in Deutschland auf höchstem Niveau etabliert. Das ist eine wichtige Voraussetzung für die Zukunft einer besonders innovativen Industrie. Große Unternehmen sind in Deutschland in diesem Feld aktiv: So steht zum Beispiel Osram für Beleuchtung, Azur Space erstellt Solarzellen für die Raumfahrt und Aixtron stellt die Anlagen für das Wachstum der Halbleiter oder genauer für die Epitaxie her. Die Wissenschaftler und Industrievertreter dieses Bereiches treffen sich jährlich unter dem Schirm der Deutschen Gesellschaft für Kristallzüchtung und Kristallwachstum. In diesem Jahr lädt Dr. Werner Prost von der Universität Duisburg-Essen nach Duisburg ein. Es werden über 100 Gäste zum Treffen des Arbeitskreises „Epitaxie von III/V-Halbleitern“ in der Sportschule Duisburg-Wedau erwartet. In diesem Jahr wird neuen und nanoskalierten Halbleitern eine besondere Aufmerksamkeit zukommen. Unmittelbar vor dem Treffen findet erstmalig ein Satellitenworkshop zur Sensorik mit Halbleiter-Heterostrukturen statt. Prof. Ferdinand Scholz (Uni Ulm) und Prof. Martin Eickhoff (Uni Bremen) laden hierzu nach Duisburg ein.

    Programm und Anmeldungen unter: www.dgkk2016.de

    Weitere Informationen: Dr. Werner Prost, Zentrum für Halbleitertechnik und Optoelektronik, 0203 379 4607, werner.prost@uni-due.de

    www.dgkk2016.de

  • First-principles modelling of screw dislocation mobility in Zr and Ti

    Emmanuel Clouet, Service de Recherches de Métallurgie Physique, SRMP CEA Saclay, Gif-sur-Yvette France
    8th. December 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 8th. December 2016 04:00 p.m.
    End: 8th. December 2016 06:00 p.m.

    http://www.icams.de/content/events/?filter=ICAMS-IFM

  • Magnetics + Mechanics + Nanoscale = Electromagnetics Future

    Prof. Gregory Paul Carman, University of California
    7th. December 2016, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 7th. December 2016 05:15 p.m.
    End: 7th. December 2016 06:30 p.m.

    Magnetics + Mechanics + Nanoscale = Electromagnetics Future

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Geothermie – Potenziale, Trends und Techniken

    Leonhard Thien, EnergieAgentur NRW Düsseldorf
    6th. December 2016, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg

    Hörsaal MD 164

    Time:
    Start: 6th. December 2016 05:15 p.m.
    End: 6th. December 2016 07:00 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Interface Superconductor with Gap Behaviour like a High-Temperature Superconductor

    Dr. Hans Boschker, Max-Planck-Institut für Festkörperforschung in Stuttgart
    5th. December 2016, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 5th. December 2016 12:00
    End: 5th. December 2016 01:00 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Angewandte chemische Analytik in der Umwelt- und Produktsicherheit

    Dirk von Czarnowski, Intertek Holding Deutschland
    5th. December 2016, Analytisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, Seminarraum S05 T02 B02

    Time:
    Start: 5th. December 2016 04:00 p.m.
    End: 5th. December 2016 06:00 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_analytisch_chemisches_kolloquium.shtml

  • In-situ studies of nanoparticle growth via pair distribution function

    Prof. Dr. Reinhard Neder, Uni Erlangen
    5th. December 2016, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, Campus Essen, Raum S03 V00 E71

    Time:
    Start: 5th. December 2016 05:15 p.m.
    End: 5th. December 2016 06:15 p.m.

    https://www.uni-due.de/chemie/aktuelles_vorträge_anorganisch_chemisches_kolloquium.shtml

  • OCTOBER 2016
  • NanoArts

    25th. October 2016, Ausstellung, Fachbibliothek GW/GSW, Campus Essen, UDE

    Time:
    Start: 25th. October 2016 00:00
    End: 4th. December 2016 00:00

    Der Nanodrache spuckt Feuer, vermeintlicher Reis bildet einen filigranen Turm, eine winzige Christbaumkugel könnte einen 30 Mikrometer großen Tannenbaum schmücken: Vom 25.10. bis zum 4.12. entführt die Ausstellung „NanoArts“ des Center for Nanointegration Duisburg-Essen (CENIDE) im Foyer der Fachbibliothek GW/GSW am Campus Essen in die Wunderwelt des Nanokosmos.

    Alle Bilder der Ausstellung stammen aus den CENIDE-Laboren an der Universität Duisburg-Essen. Doch wo im Forschungsalltag Aufbau und Funktion der Strukturen im Mittelpunkt stehen, zeigt „NanoArts“ die Ästhetik hinter der Technologie: Die Bilder aus dem Bereich des Millionstel Millimeters bieten ein Kaleidoskop von Texturen und Muster, geordneten Strukturen und Chaos, Bergen und Tälern. Schnell meint das menschliche Auge bekannte Strukturen in dieser unbekannten Dimension zu entdecken. So eröffnen die Bilder ganz neue Blickwinkel auf eine Technologie, die im Kleinen Großes leistet.

    Die Ausstellung ist zu den gewohnten Öffnungszeiten der Bibliothek kostenfrei zu besichtigen.

    Weitere Informationen: Birte Vierjahn, 0203 379-8176, birte.vierjahn@uni-due.de

    Redaktion: Birte Vierjahn, 0203 379-8176, birte.vierjahn@uni-due.de

    https://www.uni-due.de/ub/ausstell/nanoarts.php

  • Laborführung des SFB 1242 an der UDE

    2nd. December 2016, Laborführungen, Treffpunkt am Eingang des MG-Gebäudes am Campus Duisburg

    Time:
    Start: 2nd. December 2016 05:00 p.m.
    End: 2nd. December 2016 06:00 p.m.

    Hier blitzt es gewaltig und ultraschnell, ganz ohne Punkte in Flensburg: Exklusive Einblicke in das Laserlabor des neuen Sonderforschungsbereichs 1242 bietet die Fakultät für Physik der Universität Duisburg-Essen (UDE) am 4. November und 2. Dezember (17 Uhr). Der Eintritt ist frei, aber man muss sich anmelden, weil die Teilnehmerzahl begrenzt ist.

    Eine neue Lasertechnologie aus verschiedenen Komponenten aufzubauen und in Betrieb zu nehmen, ist eine echte Herausforderung, denn neue spektroskopische Verfahren brauchen Technik nach Maß. Zwei Laborführungen bieten nun allen Neugierigen und Interessierten spannende Einblicke in die Spitzenforschung, in der es um ultraschnelle Prozesse geht. Doch: Wie kommt das Laserlicht überhaupt um die Ecke? Warum wird es umgewandelt? Und wie geht das noch gleich mit dem Laserschneiden?

    Thematisch geht es im neuen SFB 1242 um „Nichtgleichgewichtsdynamik kondensierter Materie in der Zeitdomäne“. Feste Materie enthält bekanntlich Atome und Elektronen, die sich anregen und in einen Zustand höherer Energie überführen lassen, zum Beispiel durch Laser. Um ein materialübergreifendes, mikroskopisches Verständnis solcher Nichtgleichgewichtszustände zu erarbeiten, bündelt der SFB wissenschaftliche Aktivitäten aus der Physik, Chemie und den Nanowissenschaften.

    So könnten vollständig neue Materialeigenschaften und Anwendungsmöglichkeiten entstehen, zum Beispiel mit Blick auf Silizium-Wafer in der Solartechnik oder auch Isolatoren in elektrischen Geräten.

    Weitere Informationen und Anmeldung: Steffi Nickol, 0203 379 – 8177, steffi.nickol@uni-due.de

  • Individual Molecules on Surfaces: from Charging Phenomena to Chemical Reactions to Ultra - Short Timescales

    Prof. Dr. Jascha Repp, Dept. of Physics, University of Regensburg
    1st. December 2016, Interdisciplinary Lecture Series, Ruhr-Universität Bochum, HNC 30

    Time:
    Start: 1st. December 2016 05:00 p.m.
    End: 1st. December 2016 06:00 p.m.

    http://chemie.rub.de/imperia/md/content/chemie/gdch/gdch-programm_ws_1617.pdf

  • Wie müssen wir uns in Deutschland für die Zukunft aufstellen?

    1st. December 2016, Uni-Talk am Campus Duisburg, Universität Duisburg Essen, Campus Duisburg im Hörsaal LB 104

    Time:
    Start: 1st. December 2016 04:00 p.m.
    End: 1st. December 2016 05:30 p.m.

    Darüber diskutiert
    EVONIK Aufsichtsratsvorsitzender
    RAG-Stiftung Vorstandsvorsitzender
    Früherer Bundeswirtschaftsminister

    Dr. Werner Müller

    mit Studenten und Wissenschaftlern am 1. Dezember 2016 von 16:00-17:30h.

    Die Veranstaltung ist öffentlich. Die Teilnahme ist kostenlos. Anmeldung per E-Mail erbeten unter: car@uni-due.de / Stichwort „Müller-Talk"

    https://www.uni-due.de/car/

  • NOVEMBER 2016
  • The heterogeneous structure of lipid biomembranes

    Prof. Dr. Friederike Schmid, Universität Mainz
    30th. November 2016, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 30th. November 2016 05:15 p.m.
    End: 30th. November 2016 06:30 a.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Kernkraftwerke

    Dr. Markus Fendrich, RWE, Essen
    29th. November 2016, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MD 164

    Time:
    Start: 29th. November 2016 05:15 p.m.
    End: 29th. November 2016 07:00 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • High Frequency Magnetization Dynamics of Individual Atomic- Scale Magnets

    Dr. Stefan Krause, University of Hamburg
    29th. November 2016, Kolloquium des SFB 1242, Universität Duisburg-Essen
    Campus Duisburg

    Hörsaal MG 272

    Time:
    Start: 29th. November 2016 10:15 a.m.
    End: 29th. November 2016 11:15 a.m.

    https://www.uni-due.de/imperia/md/content/sfb1242/krause_29.11.16.pdf

  • MOFs and Coordination Polymers for Luminescence, Multifunctionality and Sensing

    Prof. Dr. Klaus Müller-Buschbaum, Institut für Anorganische Chemie, Universität Würzburg
    29th. November 2016, , TU Dortmund, Chemiegebäude, HS 1, Campus Nord

  • From Quantum Optical Demonstration to Quantum Technology

    Prof. Dr. Dieter Meschede , Universität Bonn
    28th. November 2016, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 28th. November 2016 11:00
    End: 28th. November 2016 01:00 p.m.

    With quantum optical experiments - interacting isolated atoms and photons - the feasibility of controlled quantum processes has been demonstrated typically for systems with a small number of degrees of freedom. I will present a few examples (two atoms radiating jointly, an atomic bomb test disproving the role of classical trajectories) which illustrate the role of important and fundamental physical concepts such as the quantum superposition principle.

    An interesting question is whether we can put forward our experimental findings to obtain significance for technological developments. I will discuss some aspects of this question.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Untersuchung des konstitutiven Verhaltens ferroelektrischer, ferromagnetischer und multiferroischer Festkörper bei mehrachsiger multiphysikalischer Beanspruchung auf Basis kondensierter Modelle

    Stephan Lange , Universität Kassel
    25th. November 2016, Seminar, Universität Duisburg-Essen, Raum V15 S04 C57, Campus Essen

    Time:
    Start: 25th. November 2016 02:00 p.m.
    End: 25th. November 2016 03:00 p.m.

    Seminar für Numerische Mathematik und Mechanik

    https://www.uni-due.de/mathematik/mathematik_kalender.php

  • 13. Patentinformationsforum

    24th. November 2016, , Großer Saarl der Industrie- und Handelskammer Dortmund, Märkische Straße 120, 44141 Dortmund

    Time:
    Start: 24th. November 2016 03:00 p.m.
    End: 24th. November 2016 07:00 p.m.

    Das 13. Patentinformationsforum der TU Dortmund, der Industrie- und Handelskammer zu Dortmund, der Handwerkskammer Dortmund, der Fachhochschule Dortmund und der Wirtschaftsförderung der Stadt Dortmund thematisiert die Verhinderung von Plagiaten und das Durchsetzten von Schutzrechten. Dazu werden vier verschiedene Themenblöcke behandelt.

    https://www.ub.tu-dortmund.de/itp/flyer_13patforum.pdf

  • Silicon Tether Motif in C–H Functionalization

    Prof. Dr. Vladimir Gevorgyan, Department of Chemistry, Chicago, USA
    23rd. November 2016, , TU Dortmund, Chemiegebäude, Room is following

    Time:
    Start: 23rd. November 2016 05:15 p.m.
    End: 23rd. November 2016 05:15 p.m.

  • Electrochemistry 3.0 - New Methods for the Production, Characterization and Application of Micro- and Nanoscale Materials

    Jun.-Prof. Dr. Kristina Tschulik, Ruhr-Universität Bochum
    22nd. November 2016, , TU Dortmund, Chemiegebäüde, Hörsaal 1, Campus Nord

  • Nanoanalytik-Workshop „Techniken, Methoden und Anwendungen“

    17th. November 2016, Workshop, Gebäude NETZ Campus Duisburg Carl-Benz-Straße 199 47057 Duisburg

    Time:
    Start: 17th. November 2016 00:00
    End: 18th. November 2016 00:00

    Welche technischen Möglichkeiten in der Nano-/Oberflächenanalytik bietet das DFG-Gerätezentrum ICAN derzeit? Und wie helfen diese bei konkreten Fragestellungen im Bereich Forschung und Entwicklung weiter? Es erwarten Sie wissenschaftliche und praxisnahe Vorträge zu den Methoden: • Photoelektronenspektroskopie (XPS/UPS) • Raster-Augerelektronenmikroskopie (SAM) • Rasterkraft-/Rastersondenmikroskopie (AFM/SPM) • Transmissions- und Rastertransmissionselektronenmikroskopie (TEM/STEM), einschließlich EELS/EDX • Flugzeit-Sekundärionenmassenspektrometrie (TOF-SIMS) Eine Führung durch das DFG-Gerätezentrum ICAN mit Demonstrationen und Beratungen zu individuellen Fragestellungen rundet das Angebot ab. Der Workshop richtet sich allgemein an Interessierte aus Industrie und Wissenschaft sowie an Studierende und Nachwuchswissenschaftler. ICAN bündelt an der Universität Duisburg-Essen Geräte, Methoden und fachliche Kompetenz zur Analytik auf der Nanometerskala und stellt diese internen und externen Nutzenden im Rahmen von Kooperationen und Dienstleistungsaufträgen zur Verfügung (www.cenide.de/ican). Im Mittelpunkt steht ein hochmodernes Mikroskopiezentrum mit fünf zueinander komplementären Großgeräten zur Charakterisierung von Oberflächen und Nanomaterialien.

  • Multiscale modelling of dislocation and plastic deformation in Magnesium and other HCP metals

    Zhaoxuan Wu, Laboratoire de modélisation mécanique multi-échelle, Ecole polytechnique fédérale de Lausanne, Lausanne Switzerland and Institute of High Performance Computing, Singapore
    17th. November 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 17th. November 2016 04:00 p.m.
    End: 17th. November 2016 00:00

    Mg, Ti, Zr and their alloys are technologically critical structural metals in lightweight, high strength or high resistance to corrosion applications. These metals all have hcp structure and exhibit strongly anisotropic, multiple slip behaviors, which are highly complicated and distinctly different among the hcp family and from those of well-established fcc and bcc metals. Despite their importance and continuous experimental and modeling efforts, our understanding on their atomistic deformation behavior is very limited. In this talk, I will present how a multiscale modeling approach, from density functional theory and empirical interatomic potential to molecular dynamics modelings and continuum theory, firmly establishes the fundamental dislocation, plasticity and fracture properties in Mg and other hcp metals. Density functional theory guided by crystal symmetry analysis is first used to obtain the fully-relaxed stacking fault energy, structure and fault vector on all relevant slip planes in a family of 6 hcp metals. The stacking fault information is then used as input to (1) elastic analysis to predict dislocation dissociation and relative dislocation energy, and (2) fit and validate an interatomic potential for simulating dislocation and fracture phenomena in Mg. The quantitative, elastic analysis provides a single framework able to capture the controlling energetics for different dissociations and slip systems across the family of hcp metals. Simulations based on the validated potential lead to a set of discoveries on unusual dislocation dissociation and cross-slip mechanisms. These new mechanisms are consistent with the elastic predictions, generic to all hcp metals, and essential in higher-scale modeling such as dislocation dynamics and crystal plasticity models. Furthermore, atomistic simulations and linear elastic fracture mechanics theory show that Mg is intrinsically brittle in many crack orientations and crack-tip geometries. The combined dislocation and crack-tip behaviors are the origins of low ductility and high hardening in Mg. The current multiscale approach not only reveals the rich, distinct, and complex behavior in the family of hcp metals, but also suggests fresh strategies to achieve high ductility in hcp metals, such as precise solid solution alloying to optimize cross-slip and enhance c-axis strain capacity, as well as to change crack-tip behavior for higher fracture toughness.

    http://www.icams.de/content/events/?filter=ICAMS-IFM

  • Thermoelektrik

    Prof. Dr. Roland Schmechel, Universität Duisburg-Essen
    17th. November 2016, Öffentliches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 231

    Time:
    Start: 17th. November 2016 05:15 p.m.
    End: 17th. November 2016 07:15 p.m.

    https://www.uni-due.de/imperia/md/content/physik/2916cerude_plakat_2016_mit_jahren_01.pdf

  • Statistische Physik von biologischen Netzwerken: Von der Zelle zu Ökosystemen

    Prof. Dr. Barbara Drossel, Technische Universität Darmstadt
    16th. November 2016, Physikalisches Kolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 122

    Time:
    Start: 16th. November 2016 05:15 p.m.
    End: 16th. November 2016 06:30 p.m.

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Werner Heisenberg und die Entdeckung der Quantenmechanik

    Prof. Dr. Daniel Hägele, Ruhr-Universität Bochum, Germany
    14th. November 2016, Public Lecture, Blue Square
    Kortumstr. 90
    44787 Bochum

    Time:
    Start: 14th. November 2016 06:00 p.m.
    End: 14th. November 2016

    „Ich hatte das Gefühl, durch die Oberfläche der atomaren Erscheinungen hindurch auf einen tief darunter liegenden Grund von merkwürdiger innerer Schönheit zu schauen.“ So berichtet Werner Karl Heisenberg (1901-1976) von der Nacht auf Helgoland, in der dem gerade 23-Jährigen der Durchbruch bei der Formulierung der Quantenmechanik gelang. Wie kam es zu diesem Durchbruch, der eine explosionsartige Weiterentwicklung der modernen Physik nach sich zog? Anlässlich seines 40. Todestags beleuchtet der Vortrag Heisenbergs Umfeld, seine Freunde und Förderer. Anhand von einfachen Gedankenexperimenten sollen populäre Begriffe aus der Quantenmechanik wie die Unschärferelation, Schrödingers Katze oder das Paralleluniversum verständlich gemacht werden. Nach dem Vortrag laden Studierende der Physik zum gemeinsamen Experimentieren ein.

    http://blue-square.rub.de/veranstaltungen/20161114-werner-heisenberg-und-die-entdeckung-der

  • Kolloquium zum Nobelpreis 2016 in Physik: Topologie, Exotische Physik und Phasenübergänge im Flachland

    Prof. Dr. Ilya Eremin, Ruhr-Universität Bochum
    14th. November 2016, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 14th. November 2016 12:00
    End: 14th. November 2016 01:00 p.m.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Trend-Workshop: Skalenüberbrückende Simulation. Werkstoff. Prozess. Bauteil.

    8th. November 2016, workshop, RUB, Conference Center

    Time:
    Start: 8th. November 2016 08:30 a.m.
    End: 8th. November 2016 5:00 p.m.

    Der Trend-Workshop „Skalenüberbrückende Simulation: Werkstoff - Prozess - Bauteil“ vermittelt Forscherinnen und Forschern aus der Industrie einen Überblick über die neuesten Entwicklungen und Möglichkeiten der skalenüberbrückenden Simulation im Bereich der Werkstoffmechanik.

    In Diskussionsrunden werden konkrete Einsatzmöglichkeiten für Simulationsmethoden in industriellen FuE-Projekten erörtert und gleichzeitig die Roadmap für die akademische und anwendungsorientierte Weiterentwicklung des Gebietes gestaltet.

    Dabei stehen folgende Fragen im Vordergrund:

    • Welche Verbesserungen im Produktionsprozess sind durch Einsatz skalenüberbrückender Simulation möglich?
    • In welchem Maße können experimentelle Untersuchungen durch Simulationen ergänzt oder substituiert werden?
    • Wie lassen sich durch Simulationen Kosteneinsparungen erzielen?
    • Welche Simulationsmethoden stehen heute schon zu Verfügung und welche müssen noch entwickelt werden?
    • In welchen Bereichen liegen aus industrieller Sicht die dringendsten Bedarfe an Simulationsmethoden im Hinblick auf Werkstoffmechanik und Prozessmodellierung?

    Weitere Informationen und Registrierung auf der Konferenzwebseite unter:

    http://tw2016.rub.de/

  • Computational Modelling, Optimization and Design of Polymeric Nano Composites

    Prof. Xiaoying Zhuang, eibniz Universität Hannover
    8th. November 2016, SFB 837 Lecture, Ruhr-Universität Bochum, IC 03-606

    Time:
    Start: 8th. November 2016 04:00 p.m.
    End: 8th. November 2016 04:00 p.m.

    The development of novel man-made materials is among the main reasons that made transistors and computers much faster, many electronic devices smaller and cheaper or medical implants more compatible. The key criteria for the choice of a material w.r.t a specific application are the macroscopic properties. However, the macroscopic properties are governed by the features and interactions at a much finer length scale. For the design of a new material, it is therefore of utmost importance to understand and quantify the effects taking place at the finer scale and how they are linked to the coarser scales.

    As (experimental) manufacturing and testing is time-consuming, expensive and sometimes unfeasible, computational methods were developed to support the design of new materials and structures.

    In this talk, Dr. Zhuang will present her recent work in multiscale and multiphysics modelling for the characterization, optimization and design of nanocomposites. Some novel computational methods including peridynamcis and phase field method will be presented for characterizing the fracture properties. She will also show some interesting applications of the methods in designing and optimizing nano energy harvester.

    http://www.sd.rub.de/de/Aktuelles.html#221

  • The heat is (still) on! – 100 Years of Rayleigh-Bénard convection

    Prof. Dr. Jörg Schumacher, TU Ilmenau
    7th. November 2016, Physikalisches Kolloquium, Hörsaal H-NB, Ruhr-Universität Bochum

    Time:
    Start: 7th. November 2016 12:00
    End: 7th. November 2016 01:00 p.m.

    A hundred years ago Lord Rayleigh published the solution to a fundamental problem of fluid mechanics in the Philosophical Magazine and Journal of Science - the onset of convective fluid motion in a viscous fluid layer that is uniformly heated from below and cooled from above. His seminal work initiated the hydrodynamic stability theory and influenced (and partly even triggered) many research directions in theoretical and experimental physics afterwards, among them chaos theory or pattern formation and turbulence. In my talk, I will briefly review some of these historic developments. In the second part of the talk, I will focus to some recent research directions of turbulent Rayleigh-Bénard convection that aim at a deeper understanding of the transport mechanisms of heat and momentum in this class of flows with its numerous applications in nature and technology. This understanding is intimately coupled to further insights into the boundary layer dynamics close to the heating and cooling plates.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Laborführung des SFB 1242 an der UDE

    4th. November 2016, Laborführung, Treffpunkt am Eingang des MG-Gebäudes am Campus Duisburg

    Time:
    Start: 4th. November 2016 05:00 p.m.
    End: 4th. November 2016 06:00 p.m.

    Hier blitzt es gewaltig und ultraschnell, ganz ohne Punkte in Flensburg: Exklusive Einblicke in das Laserlabor des neuen Sonderforschungsbereichs 1242 bietet die Fakultät für Physik der Universität Duisburg-Essen (UDE) am 4. November und 2. Dezember (17 Uhr). Der Eintritt ist frei, aber man muss sich anmelden, weil die Teilnehmerzahl begrenzt ist.

    Eine neue Lasertechnologie aus verschiedenen Komponenten aufzubauen und in Betrieb zu nehmen, ist eine echte Herausforderung, denn neue spektroskopische Verfahren brauchen Technik nach Maß. Zwei Laborführungen bieten nun allen Neugierigen und Interessierten spannende Einblicke in die Spitzenforschung, in der es um ultraschnelle Prozesse geht. Doch: Wie kommt das Laserlicht überhaupt um die Ecke? Warum wird es umgewandelt? Und wie geht das noch gleich mit dem Laserschneiden?

    Thematisch geht es im neuen SFB 1242 um „Nichtgleichgewichtsdynamik kondensierter Materie in der Zeitdomäne“. Feste Materie enthält bekanntlich Atome und Elektronen, die sich anregen und in einen Zustand höherer Energie überführen lassen, zum Beispiel durch Laser. Um ein materialübergreifendes, mikroskopisches Verständnis solcher Nichtgleichgewichtszustände zu erarbeiten, bündelt der SFB wissenschaftliche Aktivitäten aus der Physik, Chemie und den Nanowissenschaften.

    So könnten vollständig neue Materialeigenschaften und Anwendungsmöglichkeiten entstehen, zum Beispiel mit Blick auf Silizium-Wafer in der Solartechnik oder auch Isolatoren in elektrischen Geräten.

    Weitere Informationen und Anmeldung: Steffi Nickol, 0203 379 – 8177, steffi.nickol@uni-due.de

  • 3. RUHR-Symposium: Funktionale Materialien für Batterien

    27th. October 2016, Symposium, Fraunhofer-inHaus-Zentrum Forsthausweg 1 47057 Duisburg

    Time:
    Start: 27th. October 2016 8:45 a.m.
    End: 27th. October 2016 5:30 p.m.

    Das Nano-Forschungszentrum NETZ/CENIDE der Universität Duisburg-Essen veranstaltet gemeinsam mit dem CAR-Center Automotive Research und der D+S Automotive das jährlich stattfindende RUHR-Symposium. Mit dem RUHR-Symposium wollen wir die Zusammenarbeit von Industrie und Forschung vertiefen und eine Art Tauschbörse für Ideen und Innovationen im Bereich der Funktionalen Materialen schaffen. Die Industrie und deren Spitzenmanager – /Entwickler treffen auf Spitzenforschung und diskutieren von der Materialebene bis in zur Anwendung aktuelle Facetten bei funktionalen Materialien. Prominente Keynote-Redner bereichern die Veranstaltung regelmäßig: So durften wir in den Vorjahren etwa den EVONIK-CEO, Prof. Dr. Klaus Engel, den CEO der BP Europa SE, Michael Schmidt oder Prof. Dr. Robert Schlögl, Gründungsdirektor, Max-Planck-Institut für chem. Energiekonversion begrüßen.

    http://www.ruhr-symposium.de/

  • Atom probe as a tool for nanoscale characterization of engineering materials

    Baptiste Gault, Max-Planck-Institut für Eisenforschung, Düsseldorf Germany
    27th. October 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum, room IC 04-408

    Time:
    Start: 27th. October 2016 04:00 p.m.
    End: 27th. October 2016 00:00

    http://www.mrd.rub.de/seminars-and-events/

  • Materials Day 2016

    25th. October 2016, Workshop, Conference Center, Ruhr-Universität Bochum

    Time:
    Start: 25th. October 2016 8:45 a.m.
    End: 25th. October 2016 5:30 p.m.

    The Materials Day 2016 is a joint workshop of the Materials Research Department of the Ruhr-Universität Bochum and the International Max Planck Research School for Interface Controlled Materials for Energy Conversion (IMPRS-SurMat).

    The workshop will showcase recent research highlights from the Research Department and the Research School.

    The following invited speakers have confirmed their attendance:
    • Gunther Eggeler, Ruhr-Universität Bochum: On dislocation reactions in γ-channels of Ni-based single crystals in the low-temperature high-stress regime
    • Michael Horn von Hoegen, Universität Duisburg-Essen: Ultrafast electron diffraction at surfaces.
    • Christoph Janiak, Heinrich-Heine-Universität Düsseldorf: Soft wet-chemical synthesis of catalytically active metal nanoparticles in ionic liquids.
    • Christian Liebscher, MPI für Eisenforschung Düsseldorf: Complex alloys down to atomic resolution.
    • Dimitrios Manganas, MPI für Chemische Energiekonversion Mülheim a.d.R.: A unified view on heterogeneous and homogeneous catalysts through the eyes of theoretical spectroscopy.
    • Beatriz Roldan Cuenya, Ruhr-Universität Bochum: Selectivity control in the electroreduction of CO2 over nanostructured catalysts
    The Materials Day takes place on 25 October 2016 in the conference centre (Veranstaltungszentrum) of Ruhr-Universität Bochum. Invited talks will be 30 min. including discussions, contributed talks 15 min. including discussions. During the 2 hour lunch break there will be a poster session. Abstracts can be handed in via the online-registration form. Poster format is A0 upright. Registration is online only. The conference is free of charge. Please register here until 10 October 2016. For further questions please contact mrd@rub.de.

    http://www.mrd.rub.de/md2016/

  • CENIDE Science Talk

    Prof. Dr. Easo P. George, Ruhr-Universität Bochum, Prof. Dr. Heiko Wende, Universität Duisburg-Essen
    24th. October 2016, CENIDE Science Talk, NETZ Seminarraum 2.42, Universität Duisburg-Essen, Campus Duisburg, Carl-Benz-Str. 199, 47057 Duisburg

    Time:
    Start: 24th. October 2016 4:15 p.m.
    End: 24th. October 2016

    Während sich Prof. George in seinem Vortrag der Auswirkung der Längenskala im Mikro- und Nano-Bereich auf mechanische Eigenschaften von Werkstoffen widmen wird, setzt Prof. Wende den Schwerpunkt auf die Betrachtung magnetokalorischer Systeme auf dem atomaren Level.

    http://www.uni-due.de/cenide/sciencetalk.php

  • NanoBioPhotonik-Kolloquium

    19th. October 2016, Kolloqium, S07 S06 Foyer, Universitätsstraße 2, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 19th. October 2016 09:15
    End: 19th. October 2016

    Vortrag von Dr. Björn Braunschweig, Head of research group: Fluid interfaces and Soft Matter Materials, Friedrich-Alexander University of Erlangen-Nürnberg, zum Thema: "Shedding Light on Hidden Particle Interfaces with Nonlinear Optical Light Scattering"

    https://www.uni-due.de/cenide/calendar.php?jahr=2016&monat=10&tag=19

  • BOKOMAT 2016: Bochumer Kolloquium für Martensitische Transformationen

    15th. October 2016, Conference, Conference Centre, Ruhr-Universität Bochum

    Time:
    Start: 15th. October 2016
    End: 16th. October 2016

    Die Seminarreihe, die heute als BOKOMAT bekannt ist, wurde 1998 zum ersten Mal ausgerichtet, findet jetzt im Zweijahresrhythmus statt und erfreut sich wachsender Beliebtheit. Die BOKOMAT stellt eine interdisziplinäre Plattform für Weiterbildung, Gedankenaustausch und Wissenstransfer im Bereich der Formgedächtnislegierungen (FGL) und der Formgedächtnistechnik (FGT) dar. Sie hat das Ziel, aktuelle Ergebnisse aus diesen Bereichen vorzustellen, Entwicklungen zu diskutieren und insbesondere gute Arbeitskontakte zwischen Kolleginnen und Kollegen aus Hochschulen, Forschungsinstituten und der Industrie herzustellen.

    Nach dem Erfolg der letzten Veranstaltung wird auch die BOKOMAT 2016 wieder gemeinsam vom Lehrstuhl Werkstoffwissenschaft der Ruhr-Universität Bochum (RUB) und der Bochumer Ingpuls GmbH organisiert. In zwölf Jahren großzügiger Forschungsförderung durch die Deutsche Forschungsgemeinschaft im Rahmen des SFB 459 „Formgedächtnistechnik“ ist die RUB zu einem weltweit sichtbaren Standort für Formgedächtnisforschung geworden. Der Lehrstuhl Werkstoffwissenschaft forscht dabei auch nach Ende des SFB 459 an neuen Fragestellungen zu FGL intensiv weiter. Die Ingpuls GmbH, die sich 2009 als Spin-Off aus dem Institut für Werkstoffe herausgebildet hat, hat sich heute als erfolgreicher Player im Bereich der Formgedächtnistechnik etabliert. Sie macht damit den Standort Bochum zu einem der Leuchttürme auf der FGL-Weltkarte. Bei Ingpuls in Bochum entsteht derzeit eine Produktionslinie, die das gesamte FGL-Processing von der Schmelze bis zur Komponente abbildet.

    http://ingpuls.de/bokomat-2016.html

  • GEC 2016: 69th Annual Gaseous Electronics Conference

    10th. October 2016, Conference, RUB, Conference Center & Audimax

    Time:
    Start: 10th. October 2016 8:30 a.m.
    End: 14th. October 2016 6:00 p.m.

    The 69th GEC will be hosted by Ruhr-Universität Bochum. Located in the midst of the dynamic, hospitable metropolitan area of the Ruhr, in the heart of Europe, the Ruhr-Universität Bochum (RUB) with its 20 faculties, RUB’s disciplinary institutional units, is home to 5,600 employees and over 41,000 students from 130 countries. All the great scientific disciplines are united on one compact campus.

    http://www.gec2016.de/index.html.en

  • SEPTEMBER 2016
  • ICME research at TCS and ICME enabling platform TCS PREMAP

    Pramod Zagade, Tata Consultancy Services, Pune, India, Danish Khan, Tata Consultancy Services, Pune, India
    28th. September 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC-02-718

    Time:
    Start: 28th. September 2016 11:00 a.m.
    End: 28th. September 2016

    Integrated Computational Materials Engineering (ICME) is conceived as a way in which future materials and manufacturing process development will be carried out in close collaboration with end product design. ICME envisages integration of processing, structure & property models, along with methods to handle uncertainty and cost models, linked with data and knowledge base. This approach needs use of diverse tools for different aspects of physics, fidelities, length scales and their integration in a systematic product development workflow. For many years, Tata Consultancy Services (TCS) has been successfully applying state of the art simulation and modeling for solving industrial problems related to product quality concerns, process scale-up and optimization etc. Focus of our solutions have been solving the industrial issues through modeling which involved need for process modeling, multi-scale modeling, optimization, uncertainty management, robust design, data sciences etc. Many of these cases needed small scale integration at either process or length scale level. While continuing to carry out research and application broadly in the area of materials engineering in an ICME framework, we also felt a need for development of generalized strategy to address all such needs of integrative engineering with wider applications. In order to bring in extensibility and scalability in the developed solution we felt need of bringing in structured and systematic approach in materials engineering.

    With this motivation, we developed an ICME enabling IT platform TCS PREMAP (Platform for Realization of Engineered Material and Products) at Tata Consultancy Services. It is aimed at, industrializing the benefits of the ICME approach, with a special focus on integrated design of products and materials. We bring in concepts of systems engineering, ontological modeling and model driven engineering from Computer Science and apply them in materials engineering context to realize a platform capable of addressing variety of engineering design problems. It comprises of a knowledge engineering system in the form ontological models of product components, materials, manufacturing processes, physics based simulation models, surrogate models learnt from data etc. Integration among the models across processes and length scales is enabled through an interactive workbench where experts can build solutions for engineering and research problems.

    In the current presentation, we discuss ICME research at TCS and explain various aspects of our research on foundational problems of research for ICME as well as the TCS PREMAP platform, its capabilities and utility scenarios. The demonstration of platform utility is shown through two use cases of integrated gear design & manufacturing and production of Advanced High Strength Steels.

  • CENIDE Science Talk

    Prof. Dr. Leonid Zhigilei, Department of Materials Science and Engineering, University of Virginia, USA, Prof. Dr. Michael Horn-von Hoegen, Experimentalphysik, Fakultät für Physik, Universität Duisburg-Essen
    6th. September 2016, Science Talk, Universität Duisburg-Essen NanoEnergieTechnikZentrum (NETZ) Seminarraum 2.42 | Campus Duisburg Carl-Benz-Str. 199 | 47057 Duisburg

    Time:
    Start: 6th. September 2016 12.15 p.m.
    End: 6th. September 2016

    CENIDE lädt gemeinsam mit dem neuen SFB 1242 "Nichtgleichgewichtsdynamik kondensierter Materie in der Zeitdomäne" zum Science Talk mit Prof. Dr. Leonid V. Zhigilei vom Department of Materials Science and Engineering der University of Virginia aus den USA. Als themenverwandtes CENIDE-Mitglied und Teilprojektleiter im SFB 1242 wird Prof. Dr. Michael Horn-von Hoegen aus der Experimentalphysik der Fakultät für Physik der UDE vortragen. Während sich Prof. Zhigilei in seinem Vortrag der atomistischen Modellierung von Phasenübergängen und Oberflächenmodifikationen in der Prozessierung von Metallen mit Kurzpulslasern widmen wird, setzt Prof. Horn-von Hoegen den Schwerpunkt auf die ultraschnelle Elektronenbeugung an Oberflächen. Im Anschluss gibt es ein Beisammensein mit Imbiss, bei dem die Vortragenden zur Diskussion und zum Gespräch zur Verfügung stehen.

    http://www.uni-due.de/cenide/sciencetalk.php

  • Designing CALPHAD-based thermodynamic models with open-source software

    Richard Otis, Phases Research Lab, Pennsylvania State University, USA
    6th. September 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-722

    Time:
    Start: 6th. September 2016 2:30 p.m.
    End: 6th. September 2016

    The pycalphad software package is a free and open-source Python library for designing thermodynamic models, calculating phase diagrams and investigating phase equilibria within the CALPHAD method. It provides routines for reading Thermo-Calc TDB files and for solving the multi-component, multi-phase Gibbs en-ergy minimization problem. The pycalphad software project advances the state of CALPHAD modeling by providing a flexible yet powerful interface for manipulating CALPHAD data and models. The key feature of the software is that the thermody-namic models of individual phases and their associated databases can be programmatically manipulated and overridden at run-time without modifying any inter-nal solver or calculation code. Because the models are internally decoupled from the equilibrium solver and the models themselves are represented symbolically, py-calphad is an ideal tool for CALPHAD database development and model prototyping.

    The purpose of this project is to provide any interested people the ability to tinker with and improve CALPHAD models without having to be a computer scientist or expert programmer. The presentation will conclude with a project roadmap and a discussion of technical challenges.

  • AUGUST 2016
  • Joint Symposium LNQE & CENIDE

    30th. August 2016, Symposium, Universität Duisburg-Essen (NETZ) Seminarraum 2.42 Carl-Benz-Straße 199 47057 Duisburg

    Time:
    Start: 30th. August 2016 10:30 a.m.
    End: 30th. August 2016 05:00 p.m.

    https://www.uni-due.de/imperia/md/content/cenide/flyer_joint_symposium_lnqe_cenide_2016.pdf

  • JULY 2016
  • ICAMS-IfM Seminar: Engineering solutions for the conservation of cultural heritage

    Dr. Bill Wei, Rijksdienst voor het Cultureel Erfgoed, Amsterdam, The Netherlands
    14th. July 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum IC 04-408/410

    Time:
    Start: 14th. July 2016 4:00 p.m.
    End: 14th. July 2016

    Conservators and curators in museums and other cultural heritage institutes are responsible for the conservation, preservation, and restoration of aging objects, for example, archaeology, art, historic buildings, or industrial heritage. As in industry, the term aging is used in the broadest sense of the word, and can include environmental effects, chemical changes, and mechanical damage. However, unlike industrial and consumer products, historical objects and objects of art are, more often than not, unique. Decisions on display or storage conditions, and/or restoration treatments (if any) must therefore be made based on non-destructive and, often, subjective examination of the objects. So-called “conservation ethics” play an important role in such decisions. Furthermore, the uniqueness, as well as in many cases, the extreme age of the objects means that conservators are much more dependent than their industrial colleagues on materials simulations and life prediction models for understanding an object’s past, and predicting its aging behaviour in the future. This talk will look at the application of materials science and engineering methods for dealing with critical issues in conservation of objects of cultural heritage.

    http://www.icams.de/content/events/

  • Virtual testing of metallic materials: from nanomechanical testing to simulation of macroscopic properties

    Javier Segurado, IMDEA Materials Institute, Madrid, Spain, Javier LLorca, Department of Materials Science, Polytechnic University of Madrid, Spain
    14th. July 2016, ICAMS Special Seminar, Ruhr-Universität Bochum, ICAMS, Room IC 02-718

    Time:
    Start: 14th. July 2016 3:00 p.m.
    End: 14th. July 2016 4:00 p.m.

    The final objective of virtual testing of metallic materials is to predict the macroscopic mechanical properties of engineering alloys taking into account the microstructural features at different length scales (from nm to mm) by means of bottom-up multiscale modelling strategies. These strategies are currently under development and it is often more practical to measure the mechanical properties at the lower length scales (nm or µm) using nanomechanical testing techniques and use this information as input predict the macroscopic behaviour.

    This approach –as developed at IMDEA Materials Institute– is presented in the two parts of this talk. In the first one, the current nanomechanical testing capabilities to measure the mechanical properties of single crystals and polycrystals at the nm and µm as a function of the microstructural features will be presented. This information will be used in the second part to predict the macroscopic mechanical properties of single crystals and polycrystals by means of crystal plasticity finite element analysis and computational homogenization. Examples of application in Mg alloys and Ni-based superalloys will be shown.

    www.icams.de

  • ICAMS-IfM Seminar: Interaction and diffusion of solutes in Fe alloys: New insights from first principles

    Chu-Chun Fu, CEA/Saclay, France
    7th. July 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum
    IC 04/408

    Time:
    Start: 7th. July 2016 4:00 p.m.
    End: 7th. July 2016

    http://www.icams.de/content/events/?detail=1784

  • Plasma non-equilibrium at work: key to success of energy technologies?

    Prof. Dr. Richard van de Sanden, (Solar Fuels) DIFFER Eindhoven, The Netherlands
    4th. July 2016, Physics Colloquium lecture series, Ruhr-Universität Bochum
    lecture hall HNB
    Universitätsstr. 150
    44801 Bochum

    Time:
    Start: 4th. July 2016 12:15 p.m.
    End: 4th. July 2016

    After a brief introduction of DIFFER I will highlight the two main research pro-grams as defined in the Strategic Plan of 2011-2016. Plasma-surface interaction studies relevant for future fusion devices and the storage of renewable energy, either sunlight directly or renewable electricity, in so-called solar fuels will be discussed. The use of plasma non-equilibrium in the mitigation of the enormous heat and particles fluxes in divertor sections of fusion reactors is probably the key to the success of fusion. Detailed studies on plasma detachment in combination with advanced control and the use of alternative divertor concepts are needed to provide answers to this fusion challenge. Some of the highlights in recent years investigated at the Plasma-Surface-Interaction facilities (Magnum-PSI and Pilot-PSI) will be discussed. On the shorter term sustainable energy generation by means of photovoltaics or wind, will form a significant part of the energy mix. The intermittency as well as the temporal variation and the regional spread of this energy source, however, requires a means to store and transport energy on a large scale. Moreover, when fossil fuels re-sources dry up, ways of carbon dioxide re-use to provide platform molecules will be required. In this presentation plasma chemistry as a means to convert renewable electricity into fuels and chemical feedstock will be discussed. Results on activation of CO2by microwave generated plasma, attaining over 50% energy efficiency will be discussed.

    http://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches_kolloquium/

  • JUNE 2016
  • ICAMS-IfM Seminar: Leicht und hochfest direkt aus der Schmelze: Gießwalzen am LWK

    Prof. Dr.-Ing. Mirko Schaper, Universität Paderborn, Germany
    30th. June 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum IC 04-408/410

    Time:
    Start: 30th. June 2016 4:00 p.m.
    End: 30th. June 2016

  • ICAMS-IfM Seminar: On the mechanical behaviour of nonwovens

    Dr. Alvaro Ridruejo, Universidad Politécnica de Madrid, Spain
    23rd. June 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04/408

    Time:
    Start: 23rd. June 2016 4:00 p.m.
    End: 23rd. June 2016

    http://www.icams.de/content/events/?detail=1783

  • Molekulares Verständnis durch molekulare Simulationen: neue Materialien durch rationalen Syntheseplanung?

    Prof. Dr. Dirk Zahn, Friedrich-Alexander-Universität Erlangen-Nürnberg
    22nd. June 2016, Kolloquium, S07 S00 D07, Universität Duisburg-Essen, Campus Essen

    Time:
    Start: 22nd. June 2016 17:15
    End: 22nd. June 2016

    Vortrag von Prof. Dr. Dirk Zahn, Lehrstuhl für Theoretische Chemie, Computer-Chemie-Centrum, Universität Erlangen-Nürnberg, zum Thema: "Molekulares Verständnis durch molekulare Simulationen: neue Materialien durch rationalen Syntheseplanung?"

  • Importance of inclusion of the effect of s electrons into bond-order potentials for transition BCC metals with d-band mediated bonding

    Vaclav Vitek, Department of Materials Science and Engineering, University of Pennsylvania, USA
    21st. June 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-718

    Time:
    Start: 21st. June 2016 1:30 p.m.
    End: 21st. June 2016

    In bond-order potentials (BOPs) for transition metals only the bonding mediated by the d band is included explicitly and the covalent part of the cohesive energy is evaluated using Slater-Koster dd bond integrals. However, the effect of s electrons with orbitals centered on atoms neighboring the corresponding dd bond is not necessarily negligible. As shown by Nguyen-Manh et al. (Phys. Rev. Let. 85, 4136, 2000), this can be taken into account via screening of the dd bond integrals. In a recent paper of Lin at al. (Modell. Simul. Mater. Sci. Eng. 22, 034002, 2014) the dd bond integrals were determined using a projection scheme, developed by Madsen et al. (Phys. Rev. B 83, 4119, 2011), which utilizes the atomic orbitals that give the best representation of the electronic wave functions in DFT calculations. It was inferred that in this case the effect of s electrons was already included. In this talk we analyze this hypothesis by comparing studies employing BOPs with both unscreened and screened dd bond integrals. In all cases results are compared either with experiments or calculations based on the density functional theory (DFT). Studies of structures alternate to the BCC lattice, transformation paths that connect the BCC structure with FCC, simple cubic, BCT and HCP structures via continuously distorted configurations and calculations of γ-surfaces were all found to be insensitive to the screening of bond integrals. On the other hand, when the bond integrals are screened, formation energies of vacancies are improved, calculated phonon dispersion spectra reproduce the experimentally observed ones much better and dislocation core structure and dislocation glide are significantly different without and with screening of bond integrals. The latter lead to a much better agreement with available experiments. These findings suggest that the effect of s electrons on dd bonds, emulated by the screening of corresponding bond integrals, is the least significant when the lattice is distorted away from the ideal BCC structure homogeneously even if such distortion is large. Notwithstanding, when the distortion is local and inhomogeneous the impact of screening of the dd bond integrals is significant. In the studies presented such local inhomogeneities occur when phonons propagate through the lattice, at point defects and in the cores of dislocations.

    http://www.icams.de/content/events/?detail=1789

  • One-dimensional correlated Systems: From condensed Matter to cold Atoms

    Prof. Dr. Roberta Citro, University of Salerno, Italy
    20th. June 2016, Physics Colloquium lecture series, Ruhr-Universität Bochum
    lecture hall HNB
    Universitätsstr. 150
    44801 Bochum

    Time:
    Start: 20th. June 2016 12:15 p.m.
    End: 20th. June 2016

    Low dimensional systems, in which one or more spatial dimensions are small enough to restrict the degrees of freedom to the longitudinal ones , exhibit some of the most diverse and intriguing physical phenomena seen in all of condensed matter physics, and not only. I will review some of our recent results on one - dimensional interacting systems, like bosons in optical lattices and spin ladders, with a special emphasis on the role of long - range interactions, disorder, artificial gauge fields and quantum quenches. The respective phase diagrams and correlation functions are analyzed combining approaches based on bosonization technique and numerical approaches, as density matrix renormalization group (DMRG) and reputation quantum Monte Carlo (RMQM).

    http://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches_kolloquium/

  • Ultra-precision manufacturing of functional surfaces in advanced on-line/in-process surface inspection

    Zhen Tong, Centre for Precision Technologies, University of Huddersfield, UK, Feng Gao, Centre for Precision Technologies, University of Huddersfield, UK
    17th. June 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, ICFW 02-718

    Time:
    Start: 17th. June 2016 10:00 a.m.
    End: 17th. June 2016

    Fabrication of functional surfaces having micro/nanostructures has drawn great interest in recent years due to their applications in diverse research fields including optics and electronics, solar energy, cell biology, bioengineering and medical science. Numerous nanofabrication techniques including diamond machining, optical and electron beam lithography, focused ion beam (FIB) milling, nanoimprinting, femtosecond laser machining have been developed up to date to produce nanostructured devices/materials. On-line/in-process surface inspection is the key of the above manufacturing process. Here we briefly introduce the merits and limitations of these techniques and highlight the new progress made in the Centre for Precision Technologies at the University of Huddersfield both on the ultra-precision manufacturing of micro/nano-structured surfaces and on the development of one-line surface inspection methods for single point, profile and areal surface measurement.

    http://www.icams.de/content/events/?detail=1799

  • Demystifying Big Data

    Dr. Martin Schmitz, Universität Duisburg-Essen
    16th. June 2016, Elektrotechnisches Kolloquium, BA 039, Bismarckstr. 81, 47057 Duisburg, Campus Duisburg

    Time:
    Start: 16th. June 2016 16:15
    End: 16th. June 2016

    Vortrag von Dr. Martin Schmitz zum Thema: "Demystifying Big Data"

  • Fast Radio Bursts: Now you see them, now you don´t

    Prof. Dr. James Cordes, Cornell University, USA
    13th. June 2016, Physics Colloquium lecture series, Ruhr-Universität Bochum
    lecture hall HNB
    Universitätsstr. 150
    44801 Bochum

    Time:
    Start: 13th. June 2016 12:15 p.m.
    End: 13th. June 2016

    http://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches_kolloquium/

  • Explicitly Correlated Electrons in Molecules

    Prof. Dr. Willem M. Klopper, Theoretical Chemistry, KIT, Karlsruhe, Germany
    2nd. June 2016, Interdisciplinary Lecture Series Chemistry and Biochemistry, RUB, HNC 30

    Time:
    Start: 2nd. June 2016 05:15 p.m.
    End: 2nd. June 2016

  • MAY 2016
  • The Materials Chain Internation Conference - From Discovery to Production

    30th. May 2016, International Conference, Conference Centre, Ruhr-Universität Bochum, Germany

    Time:
    Start: 30th. May 2016
    End: 1st. June 2016

    This conference provides a platform for connecting across boundaries – from basic research on materials to applied technologies, from the fundamental description of materials on the atomic scale to the properties of technical components and their manufacturing.

    The conference will be structured according to the research areas of the Materials Chain: discovery, engineering, production, characterization, modelling and simulation, IT and data management.

    http://materials-chain.com/mcic2016/

  • Gitter QCD -- Verbindung von Theorie und Phaenomenologie in der Hadronenphysik

    Prof. Dr. Stephan Dürr, Bergische Universität Wuppertal, Germany
    30th. May 2016, Physics Colloquium lecture series, Ruhr-Universität Bochum
    lecture hall HNB
    Universitätsstr. 150
    44801 Bochum

    Time:
    Start: 30th. May 2016 12:15 p.m.
    End: 30th. May 2016

    http://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches_kolloquium/

  • Listening to the Spin Noise. What can one learn about Spin Dynamics without Perturbation?

    Dr. Alex Greilich, TU Dortmund University, Germany
    23rd. May 2016, invited talk, Ruhr-Universität Bochum lecture hall HNB Universitätsstr. 150 44801 Bochum

    Time:
    Start: 23rd. May 2016 12:15 p.m.
    End: 23rd. May 2016

  • ICAMS-IfM Seminar: On the role of planar faults during creep of single crystal superalloys with γ/γ' microstructures

    Michael Titus, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany
    19th. May 2016, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04-408

    Time:
    Start: 19th. May 2016 4:00 p.m.
    End: 19th. May 2016

    http://www.icams.de/content/events/?detail=1782

  • Achieving room - temperature ductility for monolithic tungsten (W)

    Dr. Jens Reiser, KIT Karlsruhe Institute of Technology, IA M Applied Materials Physics
    19th. May 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-718

    Time:
    Start: 19th. May 2016 10:30 a.m.
    End: 19th. May 2016 11:30 a.m.

    For tungsten (W), its tendency to fail at low temperatures by brittle fracture is a major limitation in its commercial exploitation. This raises the question of how to make tungsten ductile. Our ductilisation approach is the modification of the microstructure through cold-rolling. In this contribution I will present a study where we assess the evolution of the deformation and fracture mechanisms through cold-rolling.

    A batch of tungsten (W) sheets with thicknesses of 1 mm, 0.5 mm, 0.3 mm, 0.2 mm, and 0.1 mm has been rolled out of a single sintered compact. The 0.1 mm tungsten foil possesses a grain size of 230 nm in the S-direction and has exceptional mechanical properties:

    • Brittle-to-ductile transition: occurs at -90°C (183 K).
    • Tensile properties at room temperature: no hardening, increase of total elongation
    • Strain-rate sensitivity above Tc: it exists and it increases with temperature
    It is obvious that these properties cannot be explained by the classical treatment of plastic deformation and fracture of body centred cubic materials. But what are the deformation mechanisms and how to catch them?

    Aim of this presentation is to discuss the role of cold-rolling induced lattice defects (e.g. vacancies, dislocation boundaries, HAGBs) and to address the following questions: What is the reason for the enhanced mobility of dislocations? Is the nucleation and migration of kinkpairs replaced by the phonon drag mechanism? What is the role of the vacancy mobility? May partial recrystallization (HAGBs loaded with dislocations start to move) contribute to this behaviour? And how can modelling contribute to solve these issues?

  • The influence of hydrogen on mechanical behavior of metallic materials

    Matous Mrovec, Fraunhofer-Institut für Werkstoffmechanik, Germany
    13th. May 2016, ICAMS Special Seminar, RUB, IC 02/718

    Time:
    Start: 13th. May 2016 02:30 p.m.
    End: 13th. May 2016

    http://www.icams.de/content/events/?detail=1791

  • The influence of hydrogen on mechanical behavior of metallic materials

    Dr. Matous Mrovec, Fraunhofer-Institut für Werkstoffmechanik, Freiburg, Germany
    13th. May 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02-718

    Time:
    Start: 13th. May 2016 2:30 p.m.
    End: 13th. May 2016

    http://www.icams.de/content/events/?detail=1791

  • ANGEL-Conference in Essen

    9th. May 2016, Konferenz, Essen

    Time:
    Start: 9th. May 2016
    End: 12th. May 2016

    Vom 9. bis zum 12. Mai findet zum vierten Mal die „Conference on Advanced Nanoparticle Generation and Excitation by Lasers in Liquids“, kurz ANGEL, statt. Das Kernthema, über das sich die über 100 internationalen Teilnehmer erstmals in Deutschland austauschen, ist die Herstellung von Nanopartikel-Kolloiden per Laser sowie deren Anwendungspotenzial.

    Nanopartikel sind mittlerweile als Funktionselemente weit verbreitet – auf Oberflächen, im Innern von Bauteilen oder als Nanohybride. Das Anwendungsspektrum reicht dabei von der Biomedizin bis zur Energiewissenschaft. Ein alternativer Syntheseweg zur rein chemischen Synthese ist die Nanopartikelgenerierung per Laser in Flüssigkeiten. Auf diese Weise ist es möglich, ligandenfreie kolloidale Nanopartikelkomplexe herzustellen und zu konjugieren.

    Bei der alle zwei Jahre stattfindenden Konferenz diskutieren die Teilnehmer über die Mechanismen bei der Lasersynthese, die Materialvielfalt der Methode und deren Anwendungspotenzial. Gefördert wird die Veranstaltung in Essen unter anderem von der Deutschen Forschungsgemeinschaft (DFG) und vom Fonds der Chemischen Industrie.

    Weitere Informationen: Prof. Dr.-Ing- Stephan Barcikowski
    stephan.barcikowski@uni-due.de

    http://angel-conference.org/index.php?id=4453

  • Effects of Doping and Pressure in Copper based Kagome Materials: Spin Liquid and Strongly correlated Dirac Metal

    Dr. Harald Jeschke, Goethe-Universität, Frankfurt am Main
    9th. May 2016, Physikalisches Kolloquium, H-NB, Ruhr-Universität Bochum

    Time:
    Start: 9th. May 2016 12:00
    End: 9th. May 2016

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen.html

  • The Higgs boson – from discovery to future measurements

    Prof. Dr. Jochen Dingfelder, Universität Bonn
    4th. May 2016, Physikalisches Kolloquium, Saal MC122, Lotharstr. 1, 47057 Duisburg, Campus Duisburg

    Time:
    Start: 4th. May 2016 5:15 p.m.
    End: 4th. May 2016

    Vortrag von Prof. Dr. Jochen Dingfelder, Universität Bonn, zum Thema: "The Higgs boson – from discovery to future measurements"

  • Materials Design

    2nd. May 2016, ICAMS Advanced Discussions, Conference Centre, Ruhr-Universität Bochum, Germany

    Time:
    Start: 2nd. May 2016
    End: 3rd. May 2016

    The next 'ICAMS Advanced Discussions' will take place on 2+3 May 2016 in the conference center of RUB. The focus of the Advanced Discussions will be on 'Materials Design'. We have excellent invited speakers that will give an introduction and overview to the topic:

    • Dr Ulrich Bast (Siemens AG, München) - to be confirmed
    • Professor Easo George (ZGH, RUB, Bochum)
    • Dr Nicholas Hatcher (QuesTek, Evanston)
    • Professor Alfred Ludwig (IfM, RUB, Bochum)
    • Professor Nicola Marzari (THEOS, EPFL, Lausanne)
    • Professor Sebastian Weber (FUW, Universität Wuppertal, Solingen)
    The invited talks will be supplemented by contributed talks from ICAMS and others. Participation is free of charge, but registration is required. To register please send an email to advanced-discussions@icams.rub.de, at the latest by April 15, 2016. Due to the limited space available the number of participants is restricted to 130. Therefore we would like to ask for a swift reply.

  • Workshop des EU-Projekts nanOxiMet

    2nd. May 2016, Workshop, DECHEMA in Frankfurt

    Time:
    Start: 2nd. May 2016
    End: 2nd. May 2016

    Das EU-Projekt nanOxiMet unter der Leitung von Dr. Thomas Kuhlbusch lädt am 2. Mai 2016 zum abschließenden Workshop „Oxidative potential as a metric for nanomaterial grouping“ zur DECHEMA in Frankfurt ein. Anmeldungen sind bis zum 25. März möglich. Die Teilnehmer erwartet ein interessantes Programm mit Vorträgen von internationalen Experten und nanOxiMet-Partnern zu Nanomaterialien und deren Oxidationspotential im Hinblick auf Charakterisierung, toxikologische Effekte und mögliche Gruppenbildungen. Zu den Sprechern gehören unter anderem Prof. Flemming Cassee (RIVM und University of Utrecht, Niederlande), Dr. Keld Alstrup Jensen (NRCWE, Dänemark), Prof. Markus Kalberer (University of Oxford, Großbritannien) und Dr. Ian Mudway (King’s College London, Großbritannien). Über das Projekt: nanOxiMet steht für „ Oxidant generating capacity as a metric to allow grouping of nanomaterials and prediction of human health effects“. Auf Deutsch in etwa „Oxidantien-Bildungspotential als Maß für die Gruppierung von Nanomaterialien und Vorrausage von gesundheitlichen Auswirkungen auf den Menschen“. Toxikologische Studien der letzten Jahre haben gezeigt, dass die Vorhersage von pathogenen Eigenschaften von Nanomaterialien nicht per se möglich ist und dass umfassende Kenntnisse zum speziellen Nanomaterial selbst notwendig sind. Viele dieser Studien zeigen, dass auch die Partikeloberfläche und die Fähigkeit, reaktive Oxidantien zu bilden, vielversprechende Parameter sind, um die Toxizität von technisch hergestellten Nanomaterialien (MNM) vorherzusagen. Ziel dieses Projektes ist die Einteilung der MNM in verschiedene Gruppen: Dazu bedienen sich die Forscher einer kombinierten Strategie, die auf der einen Seite eine detaillierte Analyse der physikalischen Eigenschaften von ausgewählten MNM-Suspensionen beinhaltet, auf der anderen Seite die sorgfältige Beurteilung ihrer möglichen toxischen Auswirkungen in menschlichen Zellen. Mithilfe dieser Klassifizierung soll der Brückenschlag zwischen der Charakterisierung von Nanomaterialien und ihrer Bewertung hinsichtlich Toxizität gelingen. Dies ist besonders für MNM-Produzenten von Bedeutung. Redaktion: Birte Vierjahn, 0203/ 379-8176, birte.vierjahn@uni-due.de

    http://www.nanoximet.eu/?page_id=427

  • APRIL 2016
  • ICAN - Methoden und Analytikmöglichkeiten im Mikroskopiezentrum

    Dr. Markus Heidelmann, Interdisciplinary Center for Analytics on the Nanoscale (ICAN)
    28th. April 2016, NETZ-Kolloquium, Raum 2.42, Carl-Benz-Str. 199, NETZ, Campus Duisburg

    Time:
    Start: 28th. April 2016 3:15 p.m.
    End: 28th. April 2016

    Vortrag von Dr. Markus Heidelmann, ICAN, zum Thema: "ICAN - Methoden und Analytikmöglichkeiten im Mikroskopiezentrum"

  • Eine Super-Zeitlupe für Plasmonen

    Prof. Dr. Frank Meyer zu Heringdorf, Universität Duisburg-Essen
    27th. April 2016, Physikalisches Kolloquium, Saal MC122, Lotharstr. 1, 47057 Duisburg, Campus Duisburg

    Time:
    Start: 27th. April 2016 5:15 p.m.
    End: 27th. April 2016

    Vortrag von Prof. Dr. Frank Meyer zu Heringdorf, Universität Duisburg-Essen, zum Thema: "Eine Super-Zeitlupe für Plasmonen"

  • Perovskite-type materials for future Energy Technologies

    Prof. Dr. Anke Weidenkaff, Universität Stuttgart
    25th. April 2016, Anorganisch-Chemisches Kolloquium, S03V00E71, Universitätsstraße 2, Campus Essen

    Time:
    Start: 25th. April 2016 5:15p.m.
    End: 25th. April 2016

    Vortrag von Prof. Dr. Anke Weidenkaff, Uni Stuttgart, zum Thema: "Perovskite-type materials for future Energy Technologies"

  • Solid surfaces - impact on mechanics and mechano-chemical coupling in small scale systems

    Jörg Weissmüller, Technische Universität Hamburg-Haburg, Germany
    21st. April 2016, ICAMS-IfM Seminar, Ruhr Universität Bochum, IC 04-408

    Time:
    Start: 21st. April 2016 4:00 p.m.
    End: 21st. April 2016

    It is widely acknowledged that the deliberate structuring at the nanoscale provides opportunities for tailoring a materials behavior by mixing interfacial contributions into the otherwise bulk-dominated behavior. The mechanical behavior of nanomaterials, and specifically the strengthening at small scale, exemplifies the power of this strategy. While “smaller is stronger” is empirically well documented, the underlying mechanisms remain poorly understood from a microscopic point of view. There are also reports of an impact of the microstructural scale on the elastic materials’ re-sponse. Yet, while the relevant mechanics appears understood, the empirical database on elasticity of nanomaterials is sparse. This applies equally to experiments probing the excess elasticity (if any) of free surfaces and to those experiments which probe the elastic response of internal interfaces such as grain boundaries. The talk will address selected approaches to measuring surface and inter-face contributions to the mechanical behavior: surface excess stiffness [1] and grain boundary excess compliance [2] connect to the elastic response, whereas interfaces contribute to plastic deformation via the impact of surfaces on strength, [3] and via dislocation climb during grain rotation.[4]

    A key idea behind recent experiments in the field is that the mechanical chemical or mechanical electrochemical coupling at interfaces may be exploited for inducing reversible variations in the local mechanical behavior, selectively at surfaces or interfaces. This provides reliable experimental signatures of interfacial contributions to the material’s behavior that are not accessible by classic testing schemes. The strategy also advertises the strength of the electro-chemo mechanical cou-pling at interfaces. This phenomenon is as yet poorly investigated by experiment or theory, yet it provides opportunities for exciting scientific studies, and specifically it may be used to strongly af-fect materials behavior, thereby creating nanomaterials with entirely new functionality.[1,3,5]

    References:
    [1] N. Mameka, J. Markmann, H.-J. Jin and J. Weissmüller, Electrical stiffness modulation—confirming the impact of surface excess elasticity on the mechanics of nanomaterials. Acta Materialia 76 (2014) 272.
    [2] J. Weissmüller, J. Markmann, M. Grewer and R. Birringer, Kinematics of polycrystal deformation by grain boundary sliding. Acta Materialia 59 (2011) 4366.
    [3] H.J. Jin and J. Weissmüller, A Material with Electrically Tunable Strength and Flow Stress. Science 332 (2011) 1179.
    [4] D.V. Bachurin, A.A. Nazarov and J. Weissmüller, Grain rotation by dislocation climb in a finite-size grain boundary. Acta Materialia 60 (2012) 7064.
    [5] J. Weissmüller, R.N. Viswanath, D. Kramer, P. Zimmer, R. Würschum and H. Gleiter, Charge-induced reversible strain in a metal. Science 300 (2003) 312.

    http://www.icams.de/content/events/?detail=1781

  • MARCH 2016
  • Karriereforum für Promovierte

    Prof. Dr. Ulrich Radtke, Rektor, Universität Duisburg-Essen, Prof. Dr. Ursula Gather, Rektorin, Technische Universität Dortmund, Prof. Dr. Axel Schölmerich, Rektor, Ruhr-Universität Bochum
    17th. March 2016, Karriereforum, TU Dortmund, Erich-Brost-Haus

    Time:
    Start: 17th. March 2016 9:15 a.m.
    End: 17th. March 2016 5:00 p.m.

    Wissenschaftswege im Weitwinkel – unter diesem Motto bietet das ScienceCareerNet Ruhr (SCNR) am 17. März ein Karriereforum für Promovierte an. Dabei erhalten sie Tipps von Expert/innen, wie sich eine Wissenschaftskarriere am Besten angehen lässt. Anmeldeschluss: 21. Februar.

    http://www.scn-ruhr.de/karriereforum/

  • Size effects in the mechanical behavior of nanoporous gold

    Dr. Kodanda Ram Mangipudi, Universität Göttingen, Prof. Dr. Cynthia A. Volkert, Universität Göttingen
    11th. March 2016, ICAMS Special Seminar, ICAMS, Ruhr-Universität Bochum, IC 02/718

    Time:
    Start: 11th. March 2016 1:00 p.m.
    End: 11th. March 2016

    Nanoporous metals are an exciting new class of material having remarkable physical and chemical properties with potential applications such as electrochemical actuators, catalysts, biological sensors, and electrodes for fuel cells. Their remarkable physical and chemical properties owe to the nanoscale open porous structure, abundance of surfaces, and nanoscale structural dimensions. Nanoporous gold (np-Au) is the most widely studied nanoporous metal. The characteristic length scale of np-Au can easily be controlled by adjusting the dealloying conditions or annealing of dealloyed samples. Apart from the exciting functional properties, np-Au attracted much attention as it allows to probe nanoscale mechanical behavior using micron scale samples using the existing micromechanical testing procedures such as nanoindentation and micropillar compression. From the measured macroscopic mechanical response of the porous specimen, the microscopic material behavior is estimated using mechanics of cellular solids. Experiments reveal that the strength of its ligaments approaches the theoretical strength of gold as the ligament diameter is reduced. The elastic modulus is also reported to be tunable by controlling the ligament diameter. In this talk I will present an atomistics-informed multiscale modelling approach to model size effects in the elastic behavior of np-Au. Experimentally observed size effects in strength, deformation mechanisms and the proposed theories will be discussed. Using the real structure of np-Au from nanotomography, we will investigate the structure-property relations and evaluate the direct adoption of scaling laws of engineering foams to the nanoporous metals.

  • PRAXISZEIT „MATERIAL“ WERKSTOFFE FRÜHER, HEUTE & MORGEN

    3rd. March 2016, Industrie Treffen, LWL-Industriemuseum Henrichshütte Hattingen Werksstraße 31-33 45527 Hattingen

    Time:
    Start: 3rd. March 2016 1:30 p.m.
    End: 3rd. March 2016 6:00 p.m.

    Am 3. März 2016 veranstaltet das Kompetenznetzwerk für Oberflächentechnik e.V. und das Kompetenznetzwerk „FachwerkMetall“ die Praxiszeit „MATERIAL“ in der Henrichshütte in Hattingen. In der um 13 Uhr 30 beginnenden Veranstaltung dreht sich alles um innovative Werkstoffe in der Produktion und um bereits bekannte Materialien, die einer innovativen Anwendung überführt werden. Teilnahmegebühr: Mitglieder netzwerk-surface.net: 90,00 € zzgl. MwSt Nichtmitglieder: 120,00 € zzgl. MwSt Aussteller Mitglieder: 200,00 € zzgl. MwSt Aussteller Nichtmitglieder: 400,00 € zzgl. MwSt Schüler & Studenten mit Nachweis: 25€ inkl. MwSt Anmeldung per Fax an 02324 5648-48 Per E-Mail mit dem Stichwort „PZM“ an: gilfert@netzwerk-surface.net oder heenen@en-agentur.de

    http://www.fachwerkmetall.de/fachwerkmetall-veranstaltet-die-praxiszeit-material-am-3-maerz-2016-in-der-henrichshuette-in-hattingen/

  • FEBRUARY 2016
  • Grain boundary, triple junction and quadruple point mobility controlled normal grain growth

    Prof. Paulo R. Rios, Escola de Engenharia Industrial Metalúrgica de Volta Redonda, Universidade Federal Fluminense, Volta Redonda, Rio de Janeiro, Brazil
    23rd. February 2016, ICAMS Special Seminar, Ruhr Universität Bochum, Room IC 02-722

    Time:
    Start: 23rd. February 2016 11:00 a.m.
    End: 23rd. February 2016

    Grain boundaries, triple junctions, and quadruple points are geometrical elements comprising polycrystalline networks, where these elements have co-dimensions 1, 2, and 3, respectively, and control grain volumes in 3-D. For most materials, with "large" grain sizes, grain boundary mobility usually controls network kinetics. None-theless, there are a few papers published to date concerning the effects of grain network elements on the self-similar distributions for scaled grain size and number of faces per grain. Our study applies a polyhedral representation of grains that the authors developed to obtain self-similar LSW-like behavior, with distributions for the three limiting situations: where boundary, triple junction, or quadruple point mobility dominates the kinetics of network evolution. The self-similar states obtained yield important implications concerning details of polycrystalline evolution, such as grain growth “trajectories”, including grain lifetimes and their time-volume behavior. Key results are discussed in detail.
    1 Work done in cooperation with Martin E. Glicksman, College of Engineering, Flori-da Institute of Technology, Melbourne, FL, USA.

  • From lithium-ion to sodium-ion batteries: Similarities and surprises

    Prof. Dr. Philipp Adelhelm, Friedrich-Schiller Universität Jena
    15th. February 2016, Anorganisch-Chemisches Kolloquium, Universität Duisburg-Essen, S03 V00 E71, Universitätsstraße 2, Campus Essen

    Time:
    Start: 15th. February 2016 5:15 p.m.
    End: 15th. February 2016

    https://www.uni-due.de/cenide/calendar.php?jahr=2016&monat=02&tag=15&id=10243

  • Hierarchically Structured Porous Materials: From Nanoscience to Catalysis, Photocatalysis and Energy Conversion and Storage

    Dr. Lisong Xiao, Institut für Verbrennung und Gasdynamik - Reaktive Fluide, Universität Duisburg-Essen, Prof. Dr. Bao-Lian Su, Laboratory of Inorganic Materials Chemistry, University of Namur, Belgium
    11th. February 2016, CENIDE Science Talk, Universität Duisburg-Essen / NETZ / Seminarraum 2.42 / Campus Duisburg / Carl-Benz-Str. 199 / 47057 Duisburg

    Time:
    Start: 11th. February 2016 4:15 p.m.
    End: 11th. February 2016

    Prof. Dr. Bao-Lian Su Laboratory of Inorganic Materials Chemistry, University of Namur, Belgium "Nanocomposites Derived from Gas-Phase Produced Nanoparticles fro Lithium-Ion Batteries" Dr. Lisong Xiao Institut für Verbrennung und Gasdynamik - Reaktive Fluide, Universität Duisburg-Essen

    https://www.uni-due.de/cenide/sciencetalk.php

  • From Materials to Cosmology: Studying the early universe under the microscope

    Prof. Dr. Nicola Spaldin, ETH Zürich
    10th. February 2016, Physikalisches Kolloquium, UDE,

    Time:
    Start: 10th. February 2016 5:15 p.m.
    End: 10th. February 2016

    Universität Duisburg-Essen, Saal MC 122, Lotharstraße 1, Campus Duisburg

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Thermoelectric energy harvesting at the nanoscale

    Prof. Dr. Björn Sothmann, Universität Würzburg
    8th. February 2016, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 8th. February 2016 12:15 p.m.
    End: 8th. February 2016

    Recently, there has been a growing interest in thermoelectrics based on mesoscopic solid-state physics due potential applications in converting waste heat back into useful electricity. A particular focus has been on energy harvesting in multi-terminal setups. Such systems allow for a crossed flow of heat and charge and enable the separation of the heat source from the actual rectifier, thus reducing leakage heat currents. Quantum dots are promising candidates for highly efficient energy harvesting because they can act as good energy filters. In this talk, I will discuss different energy harvesters based on quantum dots in the Coulomb-blockade regime, chaotic cavities and resonant-tunneling quantum dots. In addition, I will present recent work on chiral thermoelec-trics with quantum Hall edge states that potentially allows for even higher efficiencies due to breaking of time-reversal symmetry.

    https://www.physik.ruhr-uni-bochum.de/fileadmin/data/Veranstaltungen/Physikalisches_Kolloquium/WS_15_16/08.02.16_Aushang_Sothmann.pdf

  • Including hydrodynamics and adaptivity in particle systems on parallel computers

    Godehard Sutmann, Forschungszentrum Jülich
    5th. February 2016, ICAMS Special Seminar, Ruhr-Universität Bochum, Room IC 02-158/88

    Time:
    Start: 5th. February 2016 2:30 p.m.
    End: 5th. February 2016

    Mesoscale simulations of hydrodynamic media have attracted great interest during the last years in order to bridge the gap between microscopic simulations on the atomistic level and macroscopic calculations on the continuum level. Various methods have been proposed which all have in common that they solve the Navier-Stokes equations in different types of discretizations, e.g. Lattice-Boltzmann simulations, on a spatial grid.

    In the present talk some recent developments in the mesh-free method, Multi-Particle Collision Dynamics, are presented, including a scalable implementation (MP2C) for massively parallel computers. The method enables a coupling between molecular dynamics simulations and a mesoscopic fluid, taking into account hydrodynamic interactions between atomistic particles. For dilute systems of solutes, load balancing issues are discussed and a dual domain decomposition approach is presented. Furthermore, a scheme of a local ther-mostat is presented, which takes into account statistical fluctuations in energy distributions of small sets of particles and therefore enables a local temperature control of systems under non-equilibrium conditions. Applications are shown for, e.g. semi-dilute polymer solutions in shear ow or simulations of ow in stochastic geometries of a gas diffusion layer. As an extension to the one-level approach, a hybrid scheme is presented which allows a change in resolution be-tween a mesoscopic and atomistic description of the fluid leading to an adaptive description of solvent properties.

    http://www.icams.de/content/events/

  • Nanoimprinting of ultrafine-grained and nanocrystalline metals

    Prof. Dr. ‐ Ing. Karsten Durst, TU Darmstadt, Germany
    4th. February 2016, ICAMS-IFM Seminar, RUB, IC 04-408

    Time:
    Start: 4th. February 2016 04:00 p.m.
    End: 4th. February 2016 00:00

    http://www.icams.de/content/events/

  • Zweiteiliges außerordentliches Anorganisch-Chemisches Kolloquium Chemie

    Dr. André Rittermeier, Covestro, Dormagen
    2nd. February 2016, Kolloquium, Seminarraum S05 T02 B16, Campus Essen, Universität Duisburg-Essen

    Time:
    Start: 2nd. February 2016 2:00 p.m.
    End: 2nd. February 2016

    1.) Covestro – High-value materials
    2.) Deacon process – State of the art HCI recycling

    Der Referent wird einen Einblick in die chemische Industrie geben und im ersten Teil die Firma Covestro (ehemals Bayer MaterialScience) vorstellen. Im zweiten Teil wird mit dem Deacon-Prozess ein aktueller industrieller Prozess mit seinen wissenschaftlichen, technischen und wirtschaftlichen Herausforderungen detailliert behandelt (Dauer insgesamt ca. 1 Std.).

    Nach der Veranstaltung steht Herr Dr. Rittermeier für Fragen zur wissenschaftlichen Arbeit in der chemischen Industrie im Allgemeinen und bei Covestro im Speziellen zur Verfügung. Absolventen und Interessierte haben die Gelegenheit, aktuelle Informationen über die „Industriekarriere“ aus erster Hand zu erhalten.

  • TFT Junctions

    Prof. Dr. Dirk Manske, Max-Planck-Institut für Festkörperforschung Stuttgart
    1st. February 2016, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 1st. February 2016 12:15 p.m.
    End: 1st. February 2016

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Naturwissenschaftlicher Unterricht

    Vanessa Pupkowski, Universität Duisburg-Essen
    1st. February 2016, Graduiertenkolloqium, Universität Duisburg-Essen, Campus Essen, SM 101, Schützenbahn 70

    Time:
    Start: 1st. February 2016 4:15 p.m.
    End: 1st. February 2016

    Wer Chemiekompetenzen messen möchte, sollte auf das Interesse und die Motivation der Beteiligten achten. Diese Ansicht vertritt Vanessa Pupkowski im Graduiertenkolloquium „Naturwissenschaftlicher Unterricht“ des Zentrums für empirische Bildungsforschung.

  • JANUARY 2016
  • Designing electronic phases at oxide interfaces for electronic, spintronic and energy applications

    Rossitza Pentcheva, Universität Duisburg-Essen, Germany
    28th. January 2016, ICAMS-IFM Seminar, RUB, IC 04-408

    Time:
    Start: 28th. January 2016 4:00 p.m.
    End: 28th. January 2016

    http://www.icams.de/content/events/

  • The Future of Integrated Photonics

    Professor John E. Bowers, Department of Electrical and Computer Engineering University of California, Santa Barbara
    28th. January 2016, Public Lecture, Lecture Hall, R14 R02 B07 „Neues Hörsaalzentrum“, kleiner Hörsaal (1. OG) Gladbecker Straße/Meyer-Schwickerath-Straße, 45141 Essen

    Time:
    Start: 28th. January 2016 6.00 p.m.
    End: 28th. January 2016

    John E. Bowers is Professor in the Department of Electrical and Computer Engineering at the University of California, Santa Barbara. He is the Director of the Institute for Energy Efficiency. Prof. Bowers received his M.S. and Ph.D. degrees from Stanford University and worked for AT&T Bell Laboratories and Honeywell before joining UC Santa Barbara. His research interests are in silicon photonic integrated circuits for the next generation of coherent optical systems.

    https://www.uni-due.de/de/scientist/

  • Magnetic Materials for Green Technologies

    Prof. Dr. Oliver Gutfleisch, Technische Universität Darmstadt
    27th. January 2016, Physikalisches Kolloquium,

    Time:
    Start: 27th. January 2016 5:15 p.m.
    End: 27th. January 2016

    Universität Duisburg-Essen, Saal MC 122, Lotharstraße 1, Campus Duisburg

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Phasenwechselmaterialien: Neue Materialien durch Defektkontrolle?

    Prof. Dr. Matthias Wuttig, RWTH Aachen
    26th. January 2016, Physikalisches Kolloquium der TU Dortmund, Hörsaal 2 (HG II), TU Dortmund

    Time:
    Start: 26th. January 2016 4:30 p.m.
    End: 26th. January 2016

    Phasenwechselmedien gehören zu den vielversprechendsten Materialien in der Informationstechnologie . Bisher wurden die Materialien für die unterschiedlichen Anwendungen jeweils mit empirischen Konzepten optimiert . Wir konnten nun eine alternative Strategie zur Materialoptimierung entwickeln, die zeigt, dass die kristalline Phase durch eine besondere Version der kovalenten Bindung, durch eine Resonanzbindung, charakterisiert ist. Dies erlaubt die Entwicklung einer ersten Karte für Phasen - wechselmaterialien. Einige dieser Materialien stellen zudem einen ungewöhnlichen Quantenzustand dar, der eine für kristalline Festkörper bemerkenswert hohe Unordnung aufweist, die zu besonderen Transporteigenschaften führt.

    https://www.physik.tu-dortmund.de/index.php?option=com_content&view=article&id=1615&Itemid=262

  • Recent developments of unconventional superconductors

    Prof. Dr. Brian M. Andersen, Niels-Bohr-Institut Copenhague, Denmark
    25th. January 2016, Physikalisches Kolloquium RUB,

    Time:
    Start: 25th. January 2016 12:15
    End: 25th. January 2016

    In this talk I will start by reviewing the status of unconventional superconductors, including their phase diagrams and common threads among the different classes of materials. The main focus will be on cuprates and iron - based systems, but recent interest in engineered systems with topological superconductivity will also be a d- dressed. The hunt for Majorana fermions has re - invigorated the study of unusual pairing states and the desire to construct superconductors with specific properties. I will try and highlight the open questions and ways to potentially answer them.

    The second part of the talk will be more specifically focused on iron - based super- conductors, where some of the most controversial current topics include their magnetic properties, the origin of pairing, their very strong nematic response, and the strength (and importance) of electronic correlations. The multi - orbital nature of these compounds results in very rich phase diagrams with a range of different pairing possibilities and magnetic structures that still defy a quantitative description. Recent experimental neutron studies of the magnetic structure are consistent with a weak - coupling description of the order in these materials. Finally, the iron - based systems also exhibit very interesting response to disorder, and I will end with some examples of unusual disorder behavior as seen experimentally, and discuss how to include this in to theoretical models.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Synthesis of functional nanomaterials: fundamental understanding, scale-up, and design for applications

    20th. January 2016, Symposium, University of Duisburg-Essen NETZ – NanoEnergyTechnologyCenter Carl-Benz-Straße 199 47057 Duisburg Germany

    Time:
    Start: 20th. January 2016 9:00 a.m.
    End: 21st. January 2016 5:00 p.m.

    https://www.uni-due.de/cenide/symposium_synthesis_2016.php

  • Thermodynamics and precipitation in aluminum alloys: presentation of the modeling tools used at Constellium

    Dr. Christophe Sigli, Constellium C-TEC Grenoble, France
    14th. January 2016, ICAMS-IFM Seminar, RUB, IC 04-408

    Time:
    Start: 14th. January 2016 4:00 p.m.
    End: 14th. January 2016

  • Chiral magnetic skyrmion – a new particle for information technology

    Prof. Dr. Stefan Blügel, Forschungszentrum Jülich
    13th. January 2016, Physikalisches Kolloquium, Universität Duisburg-Essen, Saal MC 122, Lotharstraße 1, Campus Duisburg

    Time:
    Start: 13th. January 2016 5:15 p.m.
    End: 13th. January 2016

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Magnetic-field control of high-temperature superconductivity and charge order

    Prof. Dr. Johann Chang, Universität Zürich, Schweiz
    11th. January 2016, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 11th. January 2016 12:15 p.m.
    End: 11th. January 2016

    Superconductivity refers to a fascinating macroscopic quantum state that is found in certain materials when cooled below a critical temperature. It holds promising perspectives for applications such as power transmission, medical imaging and energy storage devices. For three decades researchers have tried to unlock the secrets of high - temperature super conductivity found in copper oxide materials known as cuprates. Connected to this problem is a mysterious pseudogap phase and strange metallic behaviour. Recently, high-temperature charge ordering has added further complexity. This talk covers recent experimental development s with special focus on x-ray diffraction experiments.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • DECEMBER 2015
  • Mechanisms of molecular motors and pumps in biology

    Dr. Gerhard Hummer, MPI für Biophysik Frankfurt
    16th. December 2015, Großes Naturwissenschaftliches Kolloquium, Universität Duisburg-Essen
, S07 S00 D07, Universitätsstraße 2, Campus Essen

    Time:
    Start: 16th. December 2015 5:15 p.m.
    End: 16th. December 2015

    https://www.uni-due.de/physik/veranstaltungen/physikalisches_kolloquium.php

  • Sunlight, free electrons and molecular bonds: Catalysts an reactive interfaces for energy storage and conversion

    Prof. Peter Strasser, Technische Universität Berlin
    9th. December 2015, Technical and Inorganic Chemistry Joint Seminar, Universität Duisburg-Essen, S07 S06 Foyer, Universitätsstraße 2, Campus Essen

    Time:
    Start: 9th. December 2015 10:00 a.m.
    End: 9th. December 2015

    https://www.uni-due.de/cenide/calendar.php?jahr=2015&monat=12&tag=9#a

  • Graphene fabrication: From scotch tape method to direct epitaxy

    Dr. Adrien Michon, NRS Grenoble, France
    7th. December 2015, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 7th. December 2015 12:15 p.m.
    End: 7th. December 2015

    The isolation of graphene flakes by Mechanical exfoliation of graphite followed by their first transport measurements in 2004 has opened a new era for this material, and more generally, for 2D materials. Since then, many research efforts have been focused on fabrication techniques (sometime s re - dis covering old recipes), and today, several methods allows to grow large area (surface > 1 m²) or high quality (mobility > 10000 cm2/V.s) graphene. However, producing high quality graphene at the centimeter scale, and more important, in a reproducible way, remains challenging. In my presentation, I will first give an overview of the different fabrication methods, their history, advantages and drawbacks. In a second part, I will present with more details the CVD growth of graphene on SiC in hydrogen atmosphere, a specific growth method developed in our laboratory, and compare it to the well - known SiC annealing. Finally, I will present few singular achievements of the CVD method, such as the growth of graphene on nitrides or the metrology of the Ohm unit based on the quantum Hall effect in graphene grown on SiC.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Metalle, die sich erinnern können...

    Prof. Dr.-Ing. Gunther Eggeler, Ruhr-Universität Bochum
    3rd. December 2015, ING für ALLE lecture series, Blue Square, Bongardstr. 16-18, 44787 Bochum

    Time:
    Start: 3rd. December 2015 6:00 p.m.
    End: 3rd. December 2015

    ... ein kurzer Einblick in die faszinierende Welt der Formgedächtnislegierungen

    Die Forschung an Formgedächtnislegierungen hat an der Ruhr-Universität Bochum eine lange Tradition. Bochum ist ein internationales Zentrum der Formgedächtnisforschung.

    Formgedächtnislegierungen gehören zu den intelligenten Werkstoffen, die auf einen äußeren Reiz (z.B. Temperaturerhöhung) reagieren können (z.B. durch eine Verformung). Nach einer starken, scheinbar bleibenden Verformung kann man sie durch Erwärmung in ihre Ausgangsform zurückbringen.

    Dies wird im Vortrag am Beispiel der berühmten Bochumer Formgedächtnisbüroklammer demonstriert, die die Zuhörer nach Ende der Veranstaltung erhalten. Man kann Formgedächtnislegierungen als leistungsstarke Aktoren in der Luft- und Raumfahrt, im Automobilbau im Haushalt und für mikrotechnische Anwendungen einsetzen. Aber auch aus der modernen Medizintechnik sind sie heute nicht mehr wegzudenken (Stents, Implantate).

    Im Vortrag von Prof. Gunther Eggeler, dem Inhaber des Lehrstuhls Werkstoffwissenschaft an der Ruhr-Universität Bochum, werden zunächst die Grundlagen der faszinierenden Formgedächtniseffekte erklärt, die auf der sogenannten martensitischen Umwandlung beruhen. Es wird dann erläutert, wie man solche Legierungen herstellt und verarbeitet und wo diese Werkstoffklasse heute eingesetzt wird.

    Abschließend wird auch aufgezeigt, dass gerade in diesem Forschungsgebiet ein hohes Innovationspotential steckt. Als Beispiel wird über Bochumer Firmengründungen im Bereich der Formgedächtnistechnik berichtet. Insbesondere für Maschinenbauingenieure mit guten Werkstoffkenntnissen gibt es im Bereich der Formgedächtnislegierungen viele interessante Berufsfelder. Nach dem Vortrag besteht die Möglichkeit, dass Teilnehmer sich selber ein Formgedächtnisteil mit Erinnerungsvermögen bauen.

    http://www.ing.rub.de/live/ingfueralle_formgedaechtnislegierung.html.de

  • Design of Surface Modified TiO2 Photocatalysts

    Dr. Michael Nolan, Tyndall National Institute, Ireland
    2nd. December 2015, NETZ Symposium, NanoEnergieTechnikZentrum (NETZ), Seminarraum 2.42, NanoEnergieTechnikZentrum, Carl-Benz-Straße 199, Campus Duisburg

    Time:
    Start: 2nd. December 2015 10:15 a.m.
    End: 2nd. December 2015

    https://www.uni-due.de/cenide/calendar.php?jahr=2015&monat=12&tag=02&id=10303

  • NOVEMBER 2015
  • Functionalized Single Atoms for Sensing and Quantum Information Technology Engineered by Ion Beam Implantation

    Prof. Dr. Jan Meijer, Universität Leipzig
    30th. November 2015, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 30th. November 2015 12:15
    End: 30th. November 2015

    The challenge of the ultimate nanotechnology en-gineering is the ability to prepare single atoms as full functional devices. Especially the nitrogen-vacancy (NV)-center in diamond plays an increa-sing role in these fields, taking advantage of some recent technological breakthroughs and of the re-markable overall physical properties like a coher-ent spin control even at room temperature. The NV-defect in diamond consists of a substitutional nitrogen atom associated to a carbon vacancy as a first neighbor. NV centers are already used as sin-gle-photon sources or single molecule NMR mag-netometer and became a promising candidate for quantum computing at room temperature [1-3]. However, all these applications re-quire the ability to create scalable arrays with high lateral resolution [4]. The talk will give an overview about the status quo of applications using NV centers, the properties of a new color center found in Leipzig and will show new prospects in addressing of countable single atoms by ion beam implantation.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Nanopartikel-Charakterisierung und Diagnostik in der Synthese

    Prof. Dr. Kyle Daun, University of Waterloo, Canada, Prof. Dr. Thomas Dreier, Universität Duisburg-Essen, Germany
    27th. November 2015, CENIDE Science Talk, NETZ-Seminarraum 2.42, Duisburg

    Time:
    Start: 27th. November 2015 11:15 a.m.
    End: 27th. November 2015

    Die Vorträge des Science Talk stehen im Zeichen der Charakterisierung synthetischer Nanopartikel sowie der optischen Diagnostik während der Synthese.

    Professor Dr. Kyle Daun ist Associate Professor im Department of Mechanical and Mechatronics Engineering der University of Waterloo und als Humboldt-Forschungsstipendiat noch bis Ende dieses Jahres zu Gast in der Arbeitsgruppe von Prof. Dr. Christof Schulz. Sein Vortrag trägt den Titel „Laser-Induced Incandescence Characterization of
Synthetic Nanoparticles“.

    In der Folge referiert Professor Dr. Thomas Dreier vom Fachbereich Reaktive Fluide am Institut für Verbrennung und Gasdynamik über „Passive and Active optical Diagnostics in Nanoparticle Synthesis Reactors“.

    Anschließend laden wir Sie zu einem kleinen Imbiss sowie zum Austausch untereinander und mit den Referenten ein.

    Ihre Anmeldung schicken Sie bitte an cenide@uni-due.de.

    https://www.uni-due.de/cenide/news_one.php?id=1029

  • Magnetic Skyrmion Matter

    Dr. Markus Garst, Universität zu Köln
    23rd. November 2015, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 23rd. November 2015 12:15
    End: 23rd. November 2015

    Magnetic skyrmions are topological textures with a finite winding num-ber — similar to the baryon number in nuclear matter — that are stabi-lised by spin-orbit interaction in non-centrosymmetric chiral mag-nets. After an introduction to the topic, we discuss various fascinating topological transport phenomena that arise in magnetic skyrmion matter: the spin-Magnus force that governs the dynamics of skyrmion configurations, the emergent electrodynamics of electrons traversing topological skyrmion textures giving rise to a topological Hall and a skyrmion-flow Hall effect, and the skew scattering of magnons resulting in a magnon Hall effect. Their peculiar dy-namics combined with their topological quantisation promote skyrmions to promising candidates for basic bits of future magnetic storage devices and have put them at the focus of recent spintronic research.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Very high cycle fatigue of engineering alloys

    Prof. Dr.-Ing. Ulrich Krupp, FH Osnabrück - University of Applied Sciences, Germany
    19th. November 2015, ICAMS-IFM Seminar, RUB IC 04-408

    Time:
    Start: 19th. November 2015 4:00 p.m.
    End: 19th. November 2015

  • Dipolar Bose-Einstein Condensates with Weak Disorder

    Dr. Axel Pelster, TU Kaiserslautern
    16th. November 2015, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 16th. November 2015 12:00
    End: 16th. November 2015

    The talk discusses several illustrative examples where ultracold dilute atomic gases provide important insights into condensed matter physics. We start with reviewing the properties of Bose-Einstein condensates (BECs) with the anisotropic and long-range dipole-dipole interaction. To this end we investigate the influence of quantum fluctuations upon the equilibrium configuration, the low-lying oscillation frequencies, and the time-of-flight dynamics. We find that both atomic magnetic and molecular electric dipolar BECs offer promising scenarios for detecting beyond mean-field effects. Furthermore, we report on recent progress in understanding the properties of ultracold bosonic atoms in potentials with quenched disorder. This notoriously difficult dirty boson problem is experimentally relevant for the miniaturization of BECs on chips and can also be studied by tailoring disorder potentials via laser speckle fields. Theoretically it is intriguing because of the competition of localization and interaction as well as of disorder and superfluidity. Finally, we combine both previous topics and consider the impact of weak disorder upon a polarized dipolar BEC at zero temperature. Surprisingly we find that disorder corrections of the superfluid density yield characteristic interaction-induced anisotropies which are not present in the absence of disorder.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Ab initio thermodynamics of the CoCrFeMnNi high entropy alloy

    Dr. Blazej Grabowski, Max-Planck-Institut für Eisenforschung, Düsseldorf
    12th. November 2015, ICAMS-IFM Seminar, RUB IC 04-408

    Time:
    Start: 12th. November 2015 4:00 p.m.
    End: 12th. November 2015

  • Dislocation pattern formation and the similitude principle in a continuum theory of dislocation dynamics

    Dr. Stefan Sandfeld, Friedrich-Alexander-Universität Erlangen-Nürnberg, GErmany
    5th. November 2015, ICAMS-IFM Seminar, RUB, IC 04-408

    Time:
    Start: 5th. November 2015 4:00 p.m.
    End: 5th. November 2015

  • Blitz und Donner - Plasmen und das Wetter

    Prof. Dr. Achim von Keudell, Ruhr-Universität Bochum
    5th. November 2015, ING für ALLE lecture series, Blue Square, Bongardstr. 16-18, 44787 Bochum

    Time:
    Start: 5th. November 2015 6:00 p.m.
    End: 5th. November 2015

    Mysteriöse Polarlichter in schimmernden grün, grölender Donner mit leuchtenden Blitzen oder sogar schmetternde Kugelblitze – Wettererscheinungen, die uns alle faszinieren. Was nur wenige wissen: Die Atmosphäre und damit das Wetter werden von ionisierten Gas, sogenannten Plasmen beeinflusst. Achim von Keudell erklärt in einem Show-Vortrag, wie das eigentlich funktioniert. Machen Sie mit. Bringen sie Gas zum Leuchten und lernen Sie eine neue Sicht auf die Entstehung von Wetter kennen. Wie immer bieten wir Live-Experimente und Anschauungsobjekte.

    http://www.ing.rub.de/live/ingfueralle_plasma

  • 3rd International Conference on Stone and Concrete Machining (ICSCM 2015)

    Prof. Dr.-Ing. Werner Theisen, Ruhr-Universität Bochum
    2nd. November 2015, conference, RUB, Conference Center

    Time:
    Start: 2nd. November 2015
    End: 3rd. November 2015

    The machining and manufacturing of natural stone and of stonelike construction materials are expanding businesses. Concrete drilling and sawing companies as well as granite and marble machining businesses are facing increasing demands for their products and services. To maintain competitiveness, the development and improvement of the production processes is of great importance. Therefore, the cooperation and interaction between stone processing and tool producing companies is of great importance. This conference adresses professionals from industry and research to present and discuss latest developments around the machining and the processing of stone and concrete in industrial applications, as well as advances in tool materials and surface engineering with a focus on heat treatment and manufacturing.

    http://www.icscm.de/index.html

  • OCTOBER 2015
  • 2. RUHR-SYMPOSIUM: Funktionale Materialien für die Katalyse

    CENIDE,
    28th. October 2015, Conference, Fraunhofer-inHaus-Zentrum Forsthausweg 1 47057 Duisburg

    Time:
    Start: 28th. October 2015 8:30 a.m.
    End: 28th. October 2015 5:00 p.m.

    Über neue Konzepte, Entwicklungen und Anwendungsmöglichkeiten Funktionaler Materialien für die Katalyse diskutieren Experten aus Wissenschaft und Industrie beim 2. RUHR-Symposium am 28. Oktober an der Universität Duisburg-Essen (UDE). Schwerpunktthemen sind Fragen der Energiespeicherung, die Abgasreinigung bei Autos, Edelmetallkatalyse sowie technisch homogene Katalyse, synthetische Treibstoffe und Biomasse. Hauptredner ist der Vorstandsvorsitzende der BP Europa SE, Michael Schmidt („Macht die Energiewende energieintensive Unternehmen entbehrlich?“). Des Weiteren referieren neben der UDE Führungskräfte der Bayer Technology Services GmbH, Evonik Industries AG, Heraeus, Max-Planck-Gesellschaft, Ruhr-Universität Bochum, ThyssenKrupp AG, TU Dortmund und Umicore. Veranstalter sind das Center for Nanointegration (CENIDE) sowie das Center for Automotive Research (CAR). Im Job-Forum können sich Studierende und Absolventen außerdem über Karrierechancen in der Chemie informieren. Wie und woran die UDE-Experten für Funktionale Materialien forschen, zeigt zudem ein Rundgang durch das NanoEnergieTechnikZentrum (NETZ), das bereits während des gemütlichen Welcome Abends am 27. Oktober einen ersten Einblick hinter die Kulissen bietet. Hier können u. a. hochspezifische Nanomaterialien als „Kernstücke“ Funktionaler Materialien im Kilogramm-Maßstab hergestellt werden. Wie sie in Bauteile integriert werden können, ist ein gemeinsames Forschungsziel. Weitere Informationen und Anmeldung unter: https://www.uni-due.de/car/ruhrsymposium.php Sie möchten sich während des Job-Forums als attraktiver Arbeitgeber präsentieren oder an der begleitenden Fachausstellung beteiligen? Dann kontaktieren Sie bitte Steffi Nickol (CENIDE), 0203/ 379–8177, steffi.nickol@uni-due.de.

    http://www.uni-due.de/ruhrsymposium

  • Photonics in space and time

    Prof. Dr. Martin Roth, Universität Potsdam, Germany
    26th. October 2015, Physikalisches Kolloquium, RUB, H-NB

    Time:
    Start: 26th. October 2015 12:00
    End: 26th. October 2015

    A large, if not the dominating, part of the progress and growth in science, technology, and society during the 20th century must be attributed to the over-whelming success of electronics and computing. While the control of electrons as carriers of energy and information has enabled the second and third industrial revolution, it is evident that also photons as carriers of energy and information have already played an important role in this development and are likely to become a dominant factor for innovation in the 21st century. Photonics in the sense of technology based on the control of photons, analogous to electronics with regard to electrons, covers a wide range of solutions in science, industry, and many other sectors. From the focused perspective of an astrophysicist, I shall highlight the role of photonics for some key discoveries in observational astronomy in the optical and near infrared, obtained with ground-based observatories and in space. As a particularly appealing example, the break-through of imaging spectroscopy in astronomy will be discussed and illustrated with recent showcase results from the European Southern Observatory. This relatively new astronomical technique will be compared with the state-of-the-art in other disciplines, e.g. hyperspectral imaging for remote sensing, life science, and medicine. I will conclude with a number of recent pho-tonics developments for observational astronomy, such as laser frequency combs, fibre bragg gratings, and integrated photonic spectrographs, as well as an outlook for the emerging field of astrophotonics in the era of Extremly Large Telescopes and future space missions.

    https://www.physik.ruhr-uni-bochum.de/veranstaltungen/physikalisches-kolloquium.html

  • Speeding up materials discovery through high‐throughput ab initio computing

    Prof. Dr. Geoffroy Hautier, Université catholique de Louvain, Belgium
    22nd. October 2015, ICAMS-IFM Seminar, RUB, IC 04-408

    Time:
    Start: 22nd. October 2015 4:00 p.m.
    End: 22nd. October 2015

  • SEPTEMBER 2015
  • Kinetic precipitation paths in solids

    Manon Bonvalet, Normandie Université, Saint Etienne du Rouvray France
    29th. September 2015, Seminar, ICAMS, Ruhr-Universität Bochum, Room IC 02-718

    Time:
    Start: 29th. September 2015 02:00 p.m.
    End: 29th. September 2015

    The kinetics of phase separation of supersaturated solid solution is of major concern in material science. Modeling precipitation is of utmost interest both from an academic point of view and for the optimization of thermal treatments and alloy composition. We review here basics and models dealing with precipitation in binary and multicomponent alloys based on solid state thermodynamics and on volume diffusion process. From there, we develop new models to understand physic process involved in the precipitation transformation.

    http://www.icams.de/content/events/?detail=1670

  • Biocompatibility testing of biomaterials

    Christina Sengstock, Ruhr-Universität Bochum
    19th. April 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04/410

    Time:
    Start: 19th. April 2018 04:00 p.m.
    End: 05:30 p.m.

    http://www.icams.de/content/events/

  • Metal powders for additive manufacturing

    Volker Uhlenwinkel, IWT Verfahrenstechnik/Sprühkompaktieren, Bremen, Germany
    28th. June 2018, ICAMS-IfM Seminar, Ruhr-Universität Bochum, IC 04/410

    Time:
    Start: 28th. June 2018 04:00 p.m.
    End: 05:30 p.m.

    http://www.icams.de/content/events/

  • Scanning tunneling microscopy simulations from first principles

    Krisztian Palotas, Department of Theoretical Physics, Budapest University of Technology and Economics,Budapest, Hungary
    7th. November 2018, Theoretisch-Chemisches Kolloquium, Ruhr-Universität Bochum, Seminarraum NC 03/399

    Time:
    Start: 7th. November 2018 02:15 p.m.
    End: 03:15 p.m.

    https://www.theochem.ruhr-uni-bochum.de/de/allcategories-de-de/seminar/vortrag

  • Weak and strong correlation in Dirac Systems

    Prof. Dr. Seyed Akbar Jafari, Sharif University Teheran
    16th. November 2016, Theoriekolloquium, Universität Duisburg-Essen
    Campus Duisburg
    Hörsaal MC 351

    Time:
    Start: 16th. November 2016 01:15 p.m.
    End: 02:15

    In this talk we present our results on the effect of weak to strong correlations in graphene system. For weak interactions we show that the Dirac nature of spectrum provides a chance for a collective excitation formation in the triplet channel of particlehole excitations. We then address the question of Mott transition in massless and massive Dirac fermions. We find that the Hubbard U can dynamically generate negative mass giving rise to a massless Dirac spectrum for a range of interactions. For very strong interactions that place the system in the Mott phases, we find a novel collective state of two spinons which is facilitated by the background of condensed charge bosons.

    http://www.theo-phys.uni-essen.de/tp/term/abstracts/Theo-Sem-WS1617/jafari.pdf

  • The power of combined X-ray scattering based investigations: 'NiFeMnO4' as anode material for Li batteries

    Prof. Wolfgang Bensch, Christian-Albrechts-University Kiel
    29th. January 2019, TRR247 Colloquium, University of Duisburg-Essen, Essen Campus, Gästehaus Casino, Reckhammerweg 3

    Time:
    Start: 29th. January 2019 02:15 p.m.
    End: 03:45 p.m.

    https://www.uni-due.de/sfbtrr247/

  • Paving the way for quantum technologies

    Dr. Gonzalo Agustín Álvarez, Centro Atómico Bariloche, Prof. Dr. Dr. h.c. Jürgen Mlynek, Humboldt-Universität Berlin
    22nd. November 2016, , TU Dortmund, HGII/HS 2

  • Towards the coherent control of nano-scale hybrid units

    Prof. Dr. Mirko Cinchetti, TU Dortmund University
    25th. April 2017, colloquium, Hörsaal 2, Hörssalgebäude II, TU Dortmund

    Time:
    Start: 25th. April 2017 04:30 p.m.
    End: 00:00

    In the physics and chemistry of materials science, an intense focus of forefront research is the search for ever-smaller, ever-faster and energy efficient building blocks for information and communication technology (ICT) applications. The realization of next-generation devices, in ICT fields such as spintronics, spin-orbitronics and plasmonics, will depend decisively on our ability to generate new functionalities that can be coherently controlled on the shortest length and time scales. One promising route to develop a conceptually new class of active ICT nano-scale materials is to build functionality into the nano-scale object that naturally forms when an organic molecule is hybridized on a metallic surface: a nano-scale hybrid unit (NHyU).

    In this talk, before describing our plans to achieve coherent control of NHyUs, I will discuss the recent developments in the field of molecular spintronics that have motivated our ansatz. In particular, I will explain how we have used the extreme multi-functionality of organic molecules to functionalize the spin properties of ferromagnetic surfaces and also the more general class of surfaces with a spin-texture induced by strong spin-orbit coupling: the surface states of the topological insulator Bi2Se3, and the Rashba-split surface states of a Pb-Ag surface alloy.

    http://physik.tu-dortmund.de/cms/de/Fakultaet/Aktuelles/Kolloquium/index.html