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.
On this page, we briefly describe the main scientific goals of the MAPEX Core Facility. You can find some examplery papers related to each of the goals. A more comprehensive overview of the most important publications related to experiments in the MAPEX-CF can be found on our "research highlights" page.
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.
Further workflows will be established with the projects funded by the MAPEX-CF Grants for Correlated 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
Spectroscopy|
Hexagons on rectangles: Epitaxial graphene on Ru(1010)
Electron Microscopy|
Characterization of structure and mixing in nanoparticle hetero-aggregates using convolutional neural networks: 3D-reconstruction versus 2D-projection
X-Ray Diffraction| Electron Microscopy|
Photo Electrocatalytic Water Splitting Using Sn Doped In₂S₃ Homologous Series Synthesized in Oxygen Deficient Flame
Electron Microscopy|
Composition and strain of the pseudomorphic α-phase intermediate layer at the Ga₂O₃/Al₂O₃ interface
X-Ray Diffraction| Spectroscopy|
Mechanochemical synthesis of (Mg₁₋ₓFeₓ)₂SiO₄ olivine phases relevant to Martian regolith: structural and spectroscopic characterizations
Materials Modelling| X-Ray Diffraction| Spectroscopy|
Synthesis, characterization and structure-property relations in mullite-type Pb₂(Pb₁₋ₓSnₓ)O₄ solid solution
X-Ray Diffraction| Spectroscopy| Electron Microscopy|
Broadening the Realm of Nanoporous Gold Catalysts: Preparation and Properties When Emanating from AuCu as Parent Alloy
Electron Microscopy|
Synergizing ICP-MS, STEM-EDXS, and SMPS single particle analytics exemplified by superlattice L1ₒ Pt/Fe aerosol nanoparticles produced by spark ablation
X-Ray Diffraction|
Synthesis of a stable crystalline nitrene
Surface Analytics|
In situ Low-Energy Electron Microscopy of Chemical Waves on a Composite V-oxide/Rh(110) Surface
Surface Analytics| Electron Microscopy|
Influence of surface orientation on the variability of olivine dissolution rates
Electron Microscopy|
Tuning the morphology and chemical distribution of Ag atoms in Au rich nanoparticles using electrochemical dealloying
Spectroscopy| Electron Microscopy|
Atomic vs. sub-atomic layer deposition: impact of growth rate on the optical and structural properties of MoS₂ and WS₂
Spectroscopy| Electron Microscopy|
Using convolutional neural networks for stereological characterization of 3D hetero-aggregates based on synthetic STEM data
Materials Modelling| X-Ray Diffraction|
Synthesis and characterization of (Pb₁₋ₓ Srₓ )MnBO₄: a structural and spectroscopic study
Spectroscopy| Electron Microscopy|
GaN atomic electric fields from a segmented STEM detector: Experiment and simulation
Electron Microscopy|
Atom counting based on Voronoi averaged STEM intensities using a crosstalk correction scheme
X-Ray Diffraction| Spectroscopy| Surface Analytics| Electron Microscopy|
Growth, catalysis, and faceting of α-Ga₂O₃ and α-(InₓGa₁₋ₓ)₂O₃ on m-plane α-Al₂O₃ by molecular beam epitaxy
Electron Microscopy|
Characterization of mixing in nanoparticle hetero-aggregates by convolutional neural networks
Surface Analytics| Electron Microscopy|
Sputter-Deposited β-Ga₂O₃ Films With Al Top Electrodes for Resistive Random Access Memory Technology
Surface Analytics| Electron Microscopy|
Growth and characterization of sputter-deposited Ga₂O₃ -based memristive devices
3D Materials Analytics| Spectroscopy|
Gold Nanoparticle-Coated Bioceramics for Plasmonically Enhanced Molecule Detection via Surface-Enhanced Raman Scattering
3D Materials Analytics|
Timing of carbon uptake by oceanic crust determined by rock reactivity
Correlated Workflows| Spectroscopy| Electron Microscopy|
Correlative analysis on InGaN/GaN nanowires: structural and optical properties of self-assembled short-period superlattices
Spectroscopy|
Low‐energy electron microscopy intensity–voltage data – Factorization, sparse sampling and classification
Spectroscopy| Surface Analytics|
Oxygen Storage by Tin Oxide Monolayers on Pt₃Sn(111)
Materials Modelling| X-Ray Diffraction|
Halide-sodalites: thermal behavior at low temperatures and local deviations from the average structure
3D Materials Analytics|
Gas Atomization of Duplex Stainless Steel Powder for Laser Powder Bed Fusion
Materials Modelling| Electron Microscopy|
Deformed Honeycomb Lattices of InGaAs Nanowires Grown on Silicon-on-Insulator for Photonic Crystal Surface-Emitting Lasers
In-situ, real-time investigations| Spectroscopy|
Growth Mechanism of Single-Domain Monolayer MoS₂ Nanosheets on Au(111) Revealed by In Situ Microscopy: Implications for Optoelectronics Applications
Correlated Workflows| Electron Microscopy|
New Perspectives for Evaluating the Mass Transport in Porous Catalysts and Unfolding Macro- and Microkinetics
Electron Microscopy|
Dose efficient annular bright field contrast with the ISTEM method: A proof of principle demonstration
Correlated Workflows| In-situ, real-time investigations| X-Ray Diffraction| Spectroscopy| Electron Microscopy|
On red tin (II) oxide: temperature-dependent structural, spectroscopic, and thermogravimetric properties
In-situ, real-time investigations| Spectroscopy|
Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111)
Correlated Workflows| In-situ, real-time investigations| X-Ray Diffraction|
Effects of iron substitution and anti-site disorder on crystal structures, vibrational, optical and magnetic properties of double perovskites Sr₂(Fe₁₋ₓNiₓ)TeO₆
X-Ray Diffraction| Spectroscopy|
Nano-crystalline precursor formation, stability, and transformation to mullite-type visible-light photocatalysts
Correlated Workflows| Electron Microscopy|
Investigation of the dealloying front in partially corroded alloys
3D Materials Analytics| Spectroscopy|
Enhanced weathering in the seabed: Rapid olivine dissolution and iron sulfide formation in submarine volcanic ash
Electron Microscopy|
Angle-dependence of ADF-STEM intensities for chemical analysis of InGaN/GaN
Electron Microscopy|
Towards the interpretation of a shift of the central beam in nano-beam electron diffraction as a change in mean inner potential
Electron Microscopy|
Promoting Effect of the Residual Silver on the Electrocatalytic Oxidation of Methanol and Its Intermediates on Nanoporous Gold
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
Spectroscopy|
Plasmonic porous ceramics based on zirconia-toughened alumina functionalized with silver nanoparticles for surface-enhanced Raman scattering
X-Ray Diffraction|
Halide-sodalites: thermal expansion, decomposition and the Lindemann criterion
Spectroscopy|
Structural, vibrational, thermal, and magnetic properties of mullite-type NdMnTiO₅ ceramic
X-Ray Diffraction| Spectroscopy|
Thermal anomalies and phase transitions in Pb₂Sc₂Si₂O₉ and Pb₂In₂Si₂O₉
In-situ, real-time investigations| Spectroscopy|
Structural Transitions Driving Interface Pulses in Methanol Oxidation on Rh(110) and VOₓ/Rh(110): A LEEM Study
Surface Analytics|
The role of crystal heterogeneity in alkali feldspar dissolution kinetics
Surface Analytics|
Influence of Processing Route on the Surface Reactivity of Cu₄₇Ti₃₃Zr₁₁Ni₆Sn₂Si₁ Metallic Glass
Spectroscopy|
The Transition From MoS₂ Single-Layer to Bilayer Growth on the Au(111) Surface
Electron Microscopy|
Quantitative 3D Characterization of Nanoporous Gold Nanoparticles by Transmission Electron Microscopy
Correlated Workflows| Surface Analytics|
Multiscale investigation of olivine (0 1 0) face dissolution from a surface control perspective
Electron Microscopy|
Precise measurement of the electron beam current in a TEM
Materials Modelling|
A review of contact force models between nanoparticles in agglomerates, aggregates, and films
Electron Microscopy|
Angle-resolved STEM using an iris aperture: Scattering contributions and sources of error for the quantitative analysis in Si
3D Materials Analytics|
Morphological transition during prograde olivine growth formed by high-pressure dehydration of antigorite-serpentinite to chlorite-harzburgite in a subduction setting
High-throughput screening|
Short-Term Material Characterization by Electrohydraulic Incremental Extrusion through Micro Channels
Electron Microscopy|
Accurate measurement of strain at interfaces in 4D-STEM: A comparison of various methods
Correlated Workflows|
Influence of chemical zoning on sandstone calcite cement dissolution: The case of manganese and iron
In-situ, real-time investigations|
The morphology of VO₂/TiO₂(001): terraces, facets, and cracks
Spectroscopy|
The morphology of VO₂/TiO₂(001): terraces, facets, and cracks
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
X-Ray Diffraction|
Crystal structure and temperature-dependent properties of Na₂H₄Ga₂GeO₈ – a novel gallogermanate
Electron Microscopy|
Influence of plasmon excitations on atomic-resolution quantitative 4D scanning transmission electron microscopy
In-situ, real-time investigations|
Controlled Laser-Thinning of MoS₂ Nanolayers and Transformation to Amorphous MoOₓ for 2D Monolayer Fabrication
Materials Modelling|
Imaging strain-localized excitons in nanoscale bubbles of monolayer WSe₂ at room temperature
X-Ray Diffraction|
On the nature of the phase transitions of aluminosilicate perrhenate sodalite
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
3D Materials Analytics|
Strong Macroscale Supercrystalline Structures by 3D Printing Combined with Self‐Assembly of Ceramic Functionalized Nanoparticles
Spectroscopy|
Adsorption of sulfur on Si(111)
In-situ, real-time investigations|
Spatial Internal Material Load and Residual Stress Distribution Evolution in Synchrotron In SituInvestigations of Deep Rolling
High-throughput screening|
Reproducibility of High-Throughput Sample Properties Produced by a High-Temperature Molten Metal Droplet Generator
3D Materials Analytics|
Crystal surface reactivity analysis using a combined approach of X-ray micro-computed tomography and vertical scanning interferometry
High-throughput screening|
Parameter Optimization in High-Throughput Testing for Structural Materials
Spectroscopy|
Controlling the Multiscale Structure of Nanofibrous Fibrinogen Scaffolds for Wound Healing
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
3D Materials Analytics|
Morphology, shape variation and movement of skeletal elements in starfish (Asterias rubens)
Electron Microscopy|
Electrical Polarization in AlN/GaN Nanodisks Measured by Momentum-Resolved 4D Scanning Transmission Electron Microscopy
Surface Analytics|
Kinetic concepts for quantitative prediction of fluid-solid interactions
Electron Microscopy|
Influence of distortions of recorded diffraction patterns on strain analysis by nano-beam electron diffraction
Surface Analytics|
Kinetics of pipeline steel corrosion studied by Raman spectroscopy-coupled vertical scanning interferometry
X-Ray Diffraction|
Low-temperature anharmonicity and symmetry breaking in the sodalite |Na₈I₂|[AlSiO₄]₆
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
X-Ray Diffraction|
Temperature-dependent Structural and Spectroscopic Studies of (Bi₁₋ₓFeₓ)FeO₃
Surface Analytics|
Discrimination of Ceramic Surface Finishing by Vertical Scanning Interferometry
3D Materials Analytics|
Ambient occlusion – A powerful algorithm to segment shell and skeletal intrapores in computed tomography data
Electron Microscopy|
Quantitative HAADF STEM of SiGe in presence of amorphous surface layers from FIB preparation
X-Ray Diffraction|
Structural and spectroscopic comparison between polycrystalline, nanocrystalline and quantum dot visible light photo-catalyst Bi₂WO₆
Electron Microscopy|
Quantitative determination of residual silver distribution in nanoporous gold and its influence on structure and catalytic performance
3D Materials Analytics|
Classical and new bioerosion trace fossils in Cretaceous belemnite guards characterised via micro-CT
3D Materials Analytics|
3-D microstructure of olivine in complex geological materials reconstructed by correlative X-ray µ-CT and EBSD analyses
3D Materials Analytics|
Reaction-induced porosity and onset of low-temperature carbonation in abyssal peridotites: insights from 3D high-resolution microtomography
Spectroscopy|
Growth and structure of ultrathin praseodymium oxide layers on ruthenium (0001)
Spectroscopy|
Isotropic thin PTCDA films on GaN(0001)
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
Electron Microscopy|
Atomic electric fields revealed by a quantum mechanical approach to electron picodiffraction
Electron Microscopy|