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Research Highlights

2022

3D Materials Analytics| Spectroscopy|

Enhanced weathering in the seabed: Rapid olivine dissolution and iron sulfide formation in submarine volcanic ash

Wolf-Achim Kahl,  Andreas Klügel,  Wolfgang BachMangir Murshed

American Mineralogist (2022) 107 (9): 1668–1680.

https://doi.org/10.2138/am-2022-8057

In basaltic volcanic ash recovered from a seamount at 3000 m water depth, we discovered marcasite and pyrite precipitation within cavities that…


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Electron Microscopy|

Angle-dependence of ADF-STEM intensities for chemical analysis of InGaN/GaN

 Tim Grieb, Florian F.Krause, Knut Müller-Caspary, Jan Philipp Ahl, Marco Schowalter, Oliver Oppermann, Joachim Hertkorn, Karl Engl, Andreas Rosenauer

Ultramicroscopy (2022) 238, 113503

https://doi.org/10.1016/j.ultramic.2022.113535

In this paper we perform angular resolved annular-dark field…


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Electron Microscopy|

Towards the interpretation of a shift of the central beam in nano-beam electron diffraction as a change in mean inner potential

Christoph Mahr, Tim Grieb, Florian F.Krause, Marco Schowalter, Andreas Rosenauer

Ultramicroscopy (2022) 236, 113503

https://doi.org/10.1016/j.ultramic.2022.113503

The measurement of electric fields in scanning transmission electron microscopy (STEM) is a highly investigated field of research. The…


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Electron Microscopy|

Promoting Effect of the Residual Silver on the Electrocatalytic Oxidation of Methanol and Its Intermediates on Nanoporous Gold

Alex Ricardo Silva Olaya, Franziska Kühling, Christoph Mahr, Birthe Zandersons, Andreas Rosenauer, Jörg Weissmüller, and Gunther Wittstock

ACS Catal. 2022, 12, 8, 4415–4429

https://doi.org/10.1021/acscatal.1c05160

Nanoporous gold (NPG) obtained by dealloying Ag75Au25 with an overall residual Ag…


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X-Ray Diffraction|

Revisiting the Growth of Large (Mg,Zr):SrGa12O19 Single Crystals: Core Formation and Its Impact on Structural Homogeneity Revealed by Correlative X-ray Imaging

Christo Guguschev, Carsten Richter, Mario Brützam, Kaspars Dadzis, Christian Hirschle, Thorsten M. Gesing, Michael Schulze, Albert Kwasniewski, Jürgen Schreuer, and Darrell G. Schlom

Crystal Growth and Design (2022), 22, 4, 2557–2568

https://doi.org/10.1021/acs.cgd.2c00030

We demonstrate the…


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Spectroscopy|

Plasmonic porous ceramics based on zirconia-toughened alumina functionalized with silver nanoparticles for surface-enhanced Raman scattering

Tongwei Guoa, Md Nurul Karim, Kowsik Ghosh, M. Mangir Murshed, Kurosch Rezwan, Michael Maas

Open Ceramics (2022), 9, 100228

https://doi.org/10.1016/j.oceram.2022.100228

We demonstrate the feasibility of plasmonic porous ceramics which combine the optical properties of plasmonic nanoparticles with…


X-Ray Diffraction|

Halide-sodalites: thermal expansion, decomposition and the Lindemann criterion

Marius Wolpmann, Lars Robben and Thorsten M. Gesing

Zeitschrift für Kristallographie - Crystalline Materials (2022), 237, 1-3

https://doi.org/10.1515/zkri-2022-0004

Twelve cubic sodalites |Na8X2|[T1T2O4]6 (T1 = Al3+, Ga3+; T2 = Si4+, Ge4+; X = Cl−, Br−, I−) were examined using high-temperature…


2021

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Spectroscopy|

Structural, vibrational, thermal, and magnetic properties of mullite-type NdMnTiO5 ceramic

Kowsik Ghosh, M. Mangir Murshed, Thomas Frederichs, Naveen K. C. Muniraju, Thorsten M. Gesing

Journal of the American Ceramic Society (2021), 105, 2702-2712

https://doi.org/10.1111/jace.18261

Mullite-type RMn2O5 (R = Y, rare-earth element) ceramics are of ongoing research attention because of…


X-Ray Diffraction| Spectroscopy|

Thermal anomalies and phase transitions in Pb2Sc2Si2O9 and Pb2In2Si2O9

Mathias Gogolin , M. Mangir Murshed , Lkhamsuren Bayarjargal , Detlef Klimm and Thorsten M. Gesing

Zeitschrift für Kristallographie - Crystalline Materials (2021), 236, 283-292

https://doi.org/10.1515/zkri-2021-2046

Pb2Sc2Si2O9 and Pb2In2Si2O9, respectively, the scandium and indium containing…


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Spectroscopy|

Structural Transitions Driving Interface Pulses in Methanol Oxidation on Rh(110) and VOx/Rh(110): A LEEM Study

Bernhard von Boehn, Jon-Olaf Krisponeit, Jens Falta, and Ronald Imbihl

Journal of Physical Chemistry C (2021), 125, 22539–22546

https://doi.org/10.1021/acs.jpcc.1c06106

With LEEM (low-energy electron microscopy) and micro-LEED as in situ techniques we have studied the structural transitions in…


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Surface Analytics|

The role of crystal heterogeneity in alkali feldspar dissolution kinetics

Isabel Lange, Marcos Toro, Rolf S.Arvidson, Inna Kurganskaya, Andreas Lüttge

Geochimica et Cosmochimica Acta (2021) 309, 329-351

https://doi.org/10.1016/j.gca.2021.06.032

Intrinsic heterogeneities of crystals almost always impose challenges on the investigation of dissolution kinetics. In the…


Surface Analytics|

Influence of Processing Route on the Surface Reactivity of Cu47Ti33Zr11Ni6Sn2Si1 Metallic Glass

Erika Soares Barreto, Volker Uhlenwinkel, Maximilian Frey, Isabella Gallino, Ralf Busch and Andreas Lüttge

Metals (2021), 11(8), 1173

https://doi.org/10.3390/met11081173

Recently, laser additive manufacturing (AM) techniques have emerged as a promising alternative for the synthesis of bulk…


Electron Microscopy
Electron Microscopy|

Quantitative 3D Characterization of Nanoporous Gold Nanoparticles by Transmission Electron Microscopy

Christoph Mahr, Alexandra Dworzak, Marco Schowalter, Mehtap Oezaslan and Andreas Rosenauer

Microscopy and Microanalysis (2021) 27, 678 - 686

https://doi.org/10.1017/S1431927621000519

Quantitative structural characterization of nanomaterials is important to tailor their functional properties.…


Correlated Workflows| Surface Analytics|

Multiscale investigation of olivine (0 1 0) face dissolution from a surface control perspective

Xiaodong Li, Qianqian Wang, Xiaodong Shen, Elisabete T.Pedrosa and Andreas Lüttge

Applied Surface Science (2021), 549, 149317

https://doi.org/10.1016/j.apsusc.2021.149317

The surface reaction of olivine materials is critical for their extensive applications in the global cycle of elements, future…


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Electron Microscopy|

Precise measurement of the electron beam current in a TEM

Florian F. Krause, Marco Schowalter, Oliver Oppermann, Dennis Marquardt, Knut Müller-Caspary, Robert Ritz, Martin Simson, Henning Ryll, Martin Huth, Heike Soltau, Andreas Rosenauer

Ultramicroscopy (2021) 223, 113221

https://doi.org/10.1016/j.ultramic.2021.113221

Modern quantitative TEM methods…


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Electron Microscopy|

Angle-resolved STEM using an iris aperture: Scattering contributions and sources of error for the quantitative analysis in Si

Tim Grieb, Florian F. Krause, Knut Müller-Caspary, Saleh Firoozabadi, Christoph Mahr, Marco Schowalter, Andreas Beyer, Oliver Oppermann, Kerstin Volz, Andreas Rosenauer

Ultramicroscopy (2021) 221, 113175

https://doi.org/10.1016/j.ultramic.2020.113175

The angle-resolved electron scattering is…


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3D Materials Analytics|

Morphological transition during prograde olivine growth formed by high-pressure dehydration of antigorite-serpentinite to chlorite-harzburgite in a subduction setting

Nicole Dilissen, Károly Hidas Carlos J. Garrido, Vicente López Sánchez-Vizcaíno, Wolf-Achim Kahl

Lithos (2021) 382-383, 105949

https://doi.org/10.1016/j.lithos.2020.105949

Crystal morphologies are essential for deciphering the reaction history of igneous and metamorphic rocks because they often…


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Electron Microscopy|

Accurate measurement of strain at interfaces in 4D-STEM: A comparison of various methods

Christoph Mahr, Knut Müller-Caspary, Tim Grieb, Florian F. Krause, Marco Schowalter, Andreas Rosenauer

Ultramicroscopy (2021) 221, 113196

https://doi.org/10.1016/j.ultramic.2020.113196

Strain analysis by nano-beam electron diffraction allows for measurements of strain with nanometre resolution in…


2020

Eine kreisrunde Fläche aufgefächert
Spectroscopy|

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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X-Ray Diffraction| Spectroscopy|

KLi2RE(BO3)2 (RE = Dy, Ho, Er, Tm, Yb, and Y): Structural, Spectroscopic, And Thermogravimetric Studies on a Series of Mixed-Alkali Rare-Earth Orthoborates

Pengyun Chen, M. Mangir Murshed, Michael Fischer, Thomas Frederichs, and Thorsten M. Gesing

Inorg. Chem (2020), 59, 24, 18214–18224

https://doi.org/10.1021/acs.inorgchem.0c02684

We report a detailed structural, spectroscopic, and thermogravimetric investigation of a new series of mixed-alkali…


X-Ray Diffraction|

Crystal structure and temperature-dependent properties of Na2H4Ga2GeO8 – a novel gallogermanate

Irma Peschke, Lars Robben, Christof Köhler, Thomas Frauenheim, Josef-Christian Buhl and Thorsten M. Gesing

Zeitschrift für Naturforschung B (2020), 75, 9-10

https://doi.org/10.1515/znb-2020-0159

Synthesis, crystal structure and temperature-dependent behavior of Na2H4Ga2GeO8 are reported. This…


Electron Microscopy Figure
Electron Microscopy|

Influence of plasmon excitations on atomic-resolution quantitative 4D scanning transmission electron microscopy

Andreas Beyer, Florian F. Krause, Hoel L. Robert, Saleh Firoozabadi, Tim Grieb, Pirmin Kükelhan, Damien Heimes, Marco Schowalter, Knut Müller-Caspary, Andreas Rosenauer, Kerstin Volz

Nature Scientific Reports (2020) 10, 17890

https://doi.org/10.1038/s41598-020-74434-w

Scanning transmission…


X-Ray Diffraction|

On the nature of the phase transitions of aluminosilicate perrhenate sodalite

Kowsik Ghosh, M. Mangir Murshed, Thomas Frederichs, Naveen K. C. Muniraju, Thorsten M. Gesing

Zeitschrift für Kristallographie - Crystalline Materials (2020), 235, 6-7

https://doi.org/10.1515/zkri-2020-0027

The temperature-dependent structure-property relationships of the aluminosilicate…


3D printing colloidal assembly
3D Materials Analytics|

Strong Macroscale Supercrystalline Structures by 3D Printing Combined with Self‐Assembly of Ceramic Functionalized Nanoparticles

Berta Domènech, Alvin T. L. Tan, Hans Jelitto, Eduardo Zegarra Berodt, Malte Blankenburg, Oliver Focke, Jaclyn Cann, C. Cem Tasan, Lucio Colombi Ciacchi, Martin Müller, Kaline P. Furlan, A. John Hart, Gerold A. Schneider

Advanced Engineering Materials (2020) 22, 2000352

https://doi.org/10.1002/ade…


Spectroscopy|

Adsorption of sulfur on Si(111)

Th. Schmidt, L. Buß, M. Ewert, G. Schönhoff, T. Wehling. J. Falta

Surface Science (2020), 694, 121561

https://doi.org/10.1016/j.susc.2019.121561

The adsorption of S on Si(111)- 7  ×  7 has been investigated for different preparation schemes and parameters. S was supplied from an electrochemical…


3D Material Analyse
3D Materials Analytics|

Crystal surface reactivity analysis using a combined approach of X-ray micro-computed tomography and vertical scanning interferometry

Wolf-Achim Kahl, Tao Yuan, Till Bollermann, Wolfgang Bach, Cornelius Fischer

American Journal of Science (2020) 320, 27-52.

doi: 10.2475/01.2020.03 

Dissolution rates of porous crystalline materials reflect the superposition of transport and surface control, mainly via the parameters saturation…


2019

Spectroscopy|

Controlling the Multiscale Structure of Nanofibrous Fibrinogen Scaffolds for Wound Healing

Karsten Stapelfeldt, Stephani Stamboroski, Irina Walter, Naiana Suter, Thomas Kowalik, Monika Michaelis and Dorothea Brüggemann

Nano Letters (2019) 19, 6554–6563

https://doi.org/10.1021/acs.nanolett.9b02798

As a key player in blood coagulation and tissue repair, fibrinogen has gained increasing…


Picture of A new test system for unraveling the effects of soil components on the uptake and toxicity of silver nanoparticles (NM-300K) in simulated pore water
3D Materials Analytics|

A new test system for unraveling the effects of soil components on the uptake and toxicity of silver nanoparticles (NM-300K) in simulated pore water

Moira S. McKee, Jan Köser, Oliver Focke, Juliane Filser

Science of The Total Environment (2019) 673, 13-621

https://doi.org/10.1016/j.scitotenv.2019.03.493

Fate, bioavailability and toxicity of silver nanoparticles (AgNP) are largely affected by soil properties. Here we focused on how these…


Starfish
3D Materials Analytics|

Morphology, shape variation and movement of skeletal elements in starfish (Asterias rubens)

Lena Schwertmann, Oliver Focke, Jan‐Henning Dirks

Journal of Anatomy (2019) 234, 656-667

https://doi.org/10.1111/joa.12964

Starfish (order: Asteroidea) possess a complex endoskeleton composed of thousands of calcareous ossicles. These ossicles are embedded in a body wall mostly consisting of a…


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Electron Microscopy|

Electrical Polarization in AlN/GaN Nanodisks Measured by Momentum-Resolved 4D Scanning Transmission Electron Microscopy

Knut Müller-Caspary, Tim Grieb, Jan Müßener, Nicolas Gauquelin, Pascal Hille, Jörg Schörmann, Johan Verbeeck, Sandra Van Aert, Martin Eickhoff, Andreas Rosenauer

Physical Review Letters (2019) 122, 106102

https://doi.org/10.1103/PhysRevLett.122.106102

We report the mapping of polarization-induced…


Surface Analytics|

Kinetic concepts for quantitative prediction of fluid-solid interactions

Andreas Lüttge, Rolf S. Arvidson, Cornelius Fischer, Inna Kurganskaya

Chemical Geology (2019) 504, 216-235

https://doi.org/10.1016/j.chemgeo.2018.11.016

In a unique “perspectives” format that examines both past and future, we appraise the field of crystal dissolution kinetics, showing how the…


picture
Electron Microscopy|

Influence of distortions of recorded diffraction patterns on strain analysis by nano-beam electron diffraction

Christoph Mahr, Knut Müller-Caspary, Robert Ritz, Martin Simson, Tim Grieb, Marco Schowalter, Florian F. Krause, Anastasia Lackmann, Heike Soltau, Arne Wittstock, Andreas Rosenauer

Ultramicroscopy (2019) 196, 74-82

Images acquired in transmission electron microscopes can be distorted for various…


2018

Surface Analytics|

Kinetics of pipeline steel corrosion studied by Raman spectroscopy-coupled vertical scanning interferometry

Janis Heuer & Andreas Lüttge 

npj Materials Degradation (2018) 2, 40

https://doi.org/10.1038/s41529-018-0061-2

The corrosion and degradation of materials, such as pipeline steel, have a strong effect on both the environment and the economy. The quantification of these processes can therefore…


X-Ray Diffraction|

Low-temperature anharmonicity and symmetry breaking in the sodalite |Na8I2|[AlSiO4]6

Lars Robben, Isaac Abrahams, Michael Fischer, Stephen Hull, Martin T. Dove und Thorsten M. Gesing

Zeitschrift für Kristallographie - Crystalline Materials (2018) 234, Heft 4

https://doi.org/10.1515/zkri-2018-2122

The aluminosilicate iodide sodalite |Na8I2|[AlSiO4]6 was examined by…


3D Analytics Picture
3D Materials Analytics|

Textural evolution during high-pressure dehydration of serpentinite to peridotite and its relation to stress orientations and kinematics of subducting slabs: Insights from the Almirez ultramafic massif

Nicole Dilissen, Károly Hidas, Carlos J.Garrido, Wolf-Achim Kahl,Vicente López Sánchez-Vizcaíno, José Alberto Padrón-Navarta

Lithos (2018) 320-321, 470-489

https://doi.org/10.1016/j.lithos.2018.09.033

The Almirez ultramafic massif (SE Spain) preserves the transformation of high-P antigorite…


X-Ray Diffraction|

Temperature-dependent Structural and Spectroscopic Studies of (Bi1–xFex)FeO3

Andrea Kirsch, M. Mangir Murshed, Melanie J. Kirkham, Ashfia Huq, F. Jochen Litterst and Thorsten M. Gesing

The Journal of Physical Chemistry C (2018) 122 (49), 28280–28291

https://doi.org/10.1021/acs.jpcc.8b05740

We report on temperature-dependent structural and spectroscopic features of (Bi1–xF…


Surface Analytics|

Discrimination of Ceramic Surface Finishing by Vertical Scanning Interferometry

C. Ionescu, C. Fischer, V. Hoeck, A. Lüttge

Archaeometry (2019) 61

https://doi.org/10.1111/arcm.12410

Finishing techniques are significant markers of the technological ‘know‐how’ involved in the production of the traditional, clay‐based ceramic ware. In order to provide a reliable tool to…


3D Material Picture
3D Materials Analytics|

Ambient occlusion – A powerful algorithm to segment shell and skeletal intrapores in computed tomography data

J.Titschack, D. Baum, K. Matsuyama, K. Boos, C. Färber, W.-A. Kahl, K. Ehrig, D. Meinel, C. Soriano, S.R. Stock

Computers & Geosciences (2018) 115, 75-87

https://doi.org/10.1016/j.cageo.2018.03.007

During the last decades, X-ray (micro-)computed tomography has gained increasing attention for the…


Electron Microscopy Figures
Electron Microscopy|

Quantitative HAADF STEM of SiGe in presence of amorphous surface layers from FIB preparation

Tim Grieb, Moritz Tewes, Marco Schowalter, Knut Müller-Caspary, Florian F. Krause, Thorsten Mehrtens, Jean-Michel Hartmann, Andreas Rosenauer

Ultramicroscopy (2018) 184, 29-36

https://doi.org/10.1016/j.ultramic.2017.09.012

The chemical composition of four Si1-xGex layers grown on silicon was…


2017

X-Ray Diffraction|

Structural and spectroscopic comparison between polycrystalline, nanocrystalline and quantum dot visible light photo-catalyst Bi2WO6

Michael Teck, M. Mangir MurshedMarco Schowalter, Niels Lefeld, Henrike K. Grossmann, Tim Grieb, Thomas Hartmann, Lars RobbenAndreas Rosenauer, Lutz MädlerThorsten M.Gesing

Journal of Solid State Chemistry (2017) 254, 82-89 

https://doi.org/10.1016/j.jssc.2017.07.013

The structural and…


Electron Microscopy Figure
Electron Microscopy|

Quantitative determination of residual silver distribution in nanoporous gold and its influence on structure and catalytic performance

Christoph Mahr, Paromita Kundu, Anastasia Lackmann, Daniele Zanaga, Karsten Thiel, Marco Schowalter, Martin Schwan, Sara Bals, Arne Wittstock, Andreas Rosenauer

Journal of Catalysis (2017) 352, 52-58

https://doi.org/10.1016/j.jcat.2017.05.002

Large efforts have been made trying to understand the…


3D Material picture
3D Materials Analytics|

Classical and new bioerosion trace fossils in Cretaceous belemnite guards characterised via micro-CT

Max Wisshak, Jürgen Titschack, Wolf-Achim Kahl, Peter Girod

Fossil Record (2017) 20, 173–199

doi:10.5194/fr-20-173-2017

The ongoing technical revolution in non-destructive 3-D visualisation via micro-computed tomography (micro-CT) finds a valuable application in the studies of bioerosion trace…


3D Material Picture
3D Materials Analytics|

3-D microstructure of olivine in complex geological materials reconstructed by correlative X-ray µ-CT and EBSD analyses

Kahl, W.-A., Dilissen, N., Hidas, K., Garrido, C. J., López-Sánchez-Vizcaíno, V. and Román-Alpiste, M. J.

Journal of microscopy (2017) 268, 193-207

https://doi.org/10.1111/jmi.12598

We reconstruct the 3‐D microstructure of centimetre‐sized olivine crystals in rocks from the Almirez ultramafic…


2016

3D Material Picture
3D Materials Analytics|

Reaction-induced porosity and onset of low-temperature carbonation in abyssal peridotites: insights from 3D high-resolution microtomography

Niels Jöns, Wolf-Achim Kahl, Wolfgang Bach

Lithos (2016) 268-271, 274-284.

https://doi.org/10.1016/j.lithos.2016.11.014

In a drillcore sample of serpentinized harzburgite from the uppermost oceanic crust (Mid-Atlantic Ridge, ODP Leg 209, Site 1270), we demonstrate using high-resolution…


LEEm picture
Spectroscopy|

Growth and structure of ultrathin praseodymium oxide layers on ruthenium (0001)

Jan Höcker, Jon-Olaf Krisponeit, Julian Cambeis, Alexei Zakharov, Yuran Niu, Gang Wei, Lucio Colombi Ciacchi, Jens Falta, Andreas Schaefer and Jan Ingo Flege 

Physical Chemistry Chemical Physics (2017) 19, 3480-3485

https://doi.org/10.1039/C6CP06853G

The growth, morphology, structure, and…


xps spectra
Spectroscopy|

Isotropic thin PTCDA films on GaN(0001)

C. Ahrens, J. I. Flege, C. Jaye, D. A. Fischer, T. Schmidt and J. Falta

Journal of Physics: Condensed Matter (2016) 28, 475003

https://doi.org/10.1088/0953-8984/28/47/475003

The growth of 3, 4, 9, 10-perylene tetracarboxylic dianhydride (PTCDA) on the Ga-polar GaN(0 0 0 1) surface has been…


3D Material Picture
3D Materials Analytics|

A new X-ray-transparent flow-through reaction cell for a μ-CT-based concomitant surveillance of the reaction progress of hydrothermal mineral–fluid interactions

Wolf-Achim Kahl, Christian Hansen, Wolfgang Bach

Solid Earth (2016) 7, 651-658

doi:10.5194/se-7-651-2016

A new flow-through reaction cell consisting of an X-ray-transparent semicrystalline thermoplastic has been developed for percolation experiments. Core holder, tubing and all confining parts…


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