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Research

Our research focus is the investigation of structural, topographical, and chemical changes taking place on the surface and in the bulk of materials during their synthesis, manufacturing, and use. To this aim, we will perform in-situ and real-time studies, establishing correlated workflows between different characterization techniques.

Research aims

    In-situ, real-time investigations

    By using specially designed holders capable of putting samples under mechanical, thermal, or chemical loads and gradients, different kinds of in-situ and real-time studies can be performed at the MAPEX-CF. Different environmental chambers, heating/cooling stages, low-pressure gas injection nozzles, and mechanical testing stages installed at our diffraction, spectroscopy, and microscopy instruments allow for state-of-the-art materials analytics research.

    Correlated Workflows

    In order to test, image, and analyze the same sample regions with complementary techniques, correlated workflows between instruments are being constantly implemented at the MAPEX-CF. Retrieving the 3D chemical composition of different samples utilizing a correlated XRM and EDX + FIB/SEM approach and a combination of VSI/Raman spectroscopy with fast-scan AFM are some examples of already established workflows.

    Materials Modeling

    In close cooperation with the Bremen Center for Computational Materials Science (BCCMS), the experimental information obtained at MAPEX-CF is combined with materials modeling at several scales. TEM and XRD studies in combination with DFT calculations and AFM measurements together with coarse-grained dissipative particle dynamics simulations are only a few examples of the work jointly carried out between the MAPEX-CF and the BCCMS.

    Research Highlights

    agglomerates figure
    Materials Modelling|

    A review of contact force models between nanoparticles in agglomerates, aggregates, and films

    Stefan Christian Endres, Lucio Colombi Ciacchi, Lutz Mädler

    Journal of Aerosol Science (2021), 153, 105719

    https://doi.org/10.1016/j.jaerosci.2020.105719

    A desire to optimise the production and performance of nanoparticle structured materials has driven the development of increasingly accurate…

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    Figure
    High-throughput screening|

    Short-Term Material Characterization by Electrohydraulic Incremental Extrusion through Micro Channels

    Lasse Langstädtler, Sebastian Schnabel, Marius Herrmann, Christian Schenck, Bernd Kuhfuss

    Materials (2021) 14, 525

    http://doi.org/10.3390/ma14030525

    Conventional testing procedures for characterizing the mechanical behavior of materials require intense preparation in geometry and in the handling…

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    Figure
    Correlated Workflows|

    Influence of chemical zoning on sandstone calcite cement dissolution: The case of manganese and iron

    Elisabete Trindade Pedrosa, Cornelius Fischer, Luiz F. G. Morales, Ricarda D. Rohlfs, Andreas Luttge

    Chemical Geology (2021) 559, 119952

    http://doi.org/10.1016/j.chemgeo.2020.119952

    Chemical zoning of crystals is often found in nature. Crystal zoning can play a role in a mineral's thermodynamic…

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    Eine kreisrunde Fläche aufgefächert
    In-situ, real-time investigations|

    The morphology of VO2/TiO2(001): terraces, facets, and cracks

    Jon-Olaf Krisponeit, Simon Fischer, Sven Esser, Vasily Moshnyaga, Thomas Schmidt, Louis F. J. Piper, Jan Ingo Flege, Jens Falta

    Nature Scientific Reports (2020) 10, 22374

    https://doi.org/10.1038/s41598-020-78584-9

    Vanadium dioxide (VO2) features a pronounced, thermally-driven metal-to-insulator…

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    Laser on substrate Figure
    In-situ, real-time investigations|

    Controlled Laser-Thinning of MoS2 Nanolayers and Transformation to Amorphous MoOx for 2D Monolayer Fabrication

    Christian Tessarek, Oleg Gridenco, Martin Wiesing, Jan Müssener, Stephan Figge, Kathrin Sebald, Jürgen Gutowski, Martin Eickhoff

    ACS Applied Nano Materials (2020) 3, 7490-7498

    http://doi.org/10.1021/acsanm.0c01104

    Laser-thinning of 2D materials such as MoS2 is a promising approach for a local…

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    science Figure
    Materials Modelling|

    Imaging strain-localized excitons in nanoscale bubbles of monolayer WSe2 at room temperature

    Thomas P. Darlington, Christian Carmesin, Matthias Florian, Emanuil Yanev, Obafunso Ajayi, Jenny Ardelean, Daniel A. Rhodes, Augusto Ghiotto, Andrey Krayev, Kenji Watanabe, Takashi Taniguchi, Jeffrey W. Kysar, Abhay N. Pasupathy, James C. Hone, Frank Jahnke, Nicholas J. Borys, P. James Schuck 

    Natu…

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    Catalyst redistribution Figure
    In-situ, real-time investigations|

    Reaction dynamics of metal/oxide catalysts: Methanol oxidation at vanadium oxide films on Rh(111) from UHV to 10(-2) mbar

    Bernhard von Boehn, Christopher Penschke, Xiaoke Li, Joachim Paier, Joachim Sauer, Jon-Olaf Krisponeit, Jan Ingo Flege, Jens Falta, Helder Marchetto, Torsten Franz, Gerhard Lilienkamp, Ronald Imbihl

    Journal of Catalysis (2020), 385, 255-264

    https://doi.org/10.1016/j.jcat.2020.03.016

    Recent…

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    Stress Figure
    In-situ, real-time investigations|

    Spatial Internal Material Load and Residual Stress Distribution Evolution in Synchrotron In SituInvestigations of Deep Rolling

    Heiner Meyer,Jérémy Epp

    Quantum Beam Science (2020) 4, 3

    https://doi.org/10.3390/qubs4010003

    Mechanical loading scenarios, comparable to a deep rolling process, were reproduced in static indentation experiments on AISI 4140H steel samples with a cylindrical deep rolling tool and investigated in…

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    graphical abstract with a diagramm
    High-throughput screening|

    Reproducibility of High-Throughput Sample Properties Produced by a High-Temperature Molten Metal Droplet Generator

    Saeedeh Imani Moqadam, Michael Baune, Ingmar Bösing, Carsten Heinzel, Daniel Meyer, Arne Thomann, Nicole Wielki, Nils Ellendt

    Metals (2020) 10, 297

    http://doi.org/10.3390/met10030297

    A high-throughput method for the discovery of structural materials requires a large number of samples with highly…

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    workflow Figure
    High-throughput screening|

    Parameter Optimization in High-Throughput Testing for Structural Materials

    Alexander Bader, Anastasiya Toenjes, Nicole Wielki, Andreas Mändle, Ann-Kathrin Onken, Axel von Hehl, Daniel Meyer, Werner Brannath, Kirsten Tracht

    Materials (2019) 12, 3439

    http://doi.org/10.3390/ma12203439

    High-throughput screenings are established evaluation methods in the development of…

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    Updated by: MAPEX