A5002583425- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Electron and X-Ray Spectroscopy Techniques
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Fullerene Chemistry and Applications
- Crystallography and molecular interactions
- Advanced Electron Microscopy Techniques and Applications
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Graphene research and applications
- Advancements in Photolithography Techniques
- Advanced Chemical Physics Studies
- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- Quantum, superfluid, helium dynamics
- Radiation Detection and Scintillator Technologies
- Electronic and Structural Properties of Oxides
- Force Microscopy Techniques and Applications
- Cellular Mechanics and Interactions
- Atomic and Molecular Physics
Leipzig University
1989-2024
Focus (Germany)
1998-2014
Deutsches Elektronen-Synchrotron DESY
2012
Heidelberg University
2009
University Hospital Heidelberg
2009
European Organization for Nuclear Research
2002
Johannes Gutenberg University Mainz
1991-1997
FZI Research Center for Information Technology
1991-1994
University of Zurich
1992-1994
University of California, Berkeley
1993
An ovel instrument for imaging ESCA is described. It based on a tandem arrangement of two hemispherical energy analysers used as an filter. The main spherical aberration (α 2 -term) the analyser corrected by antisymmetry configuration. kinetic range useable extends up to 1.6 keV; this compatible with Mg and Al Kα laboratory x-ray sources. First experiments chemical surface composition Cu0.98Bi0.02 polycrystal, GaAs/AlGaAs heterostructure Ag crystallites Si(111) have been performed using...
The high-resolution photoemission spectral profiles of the conduction bands ${\mathrm{K}}_{3}$${\mathrm{C}}_{60}$ and ${\mathrm{Rb}}_{3}$${\mathrm{C}}_{60}$ recorded at 10 K exhibit fine structure not observed higher temperatures. Calculations effects electron-boson coupling in ${\mathit{A}}_{3}$${\mathrm{C}}_{60}$ within a simple model demonstrate that features low-temperature weight are consistent with satellites due to phonons charge-carrier plasmon. Possible causes temperature dependence...
High-resolution photoemission studies have been performed on undoped and K-doped ${\mathrm{C}}_{60}$ films. In the material, temperature-dependent measurements showed no significant change of valence-band electronic structure crossing structural phase transitions at 90 K 249 K. Studies ${\mathrm{K}}_{\mathit{x}}$${\mathrm{C}}_{60}$ conducted with a variety photon energies doping levels show that ${\mathrm{K}}_{3}$${\mathrm{C}}_{60}$ is metal, sharp Fermi edge situated maximum occupied part...
We have developed an energy analyzer, High Voltage-Cylinder Sector Analyzer 300/15, for electron kinetic energies up to 15 keV. It is especially suited hard x-ray photoelectron spectroscopy, but also ultraviolet and soft spectroscopy (ultraviolet photoemission spectroscopy), Auger reflection high spectroscopy. The analyzer based on a cylinder sector with 90 degrees deflection, 300 mm slit-to-slit distance, four-element pre-retarding lens system 50 sample-to-lens distance. result very compact...
Hard x-ray photoelectron spectroscopy (HAXPES) has now matured into a well-established technique as bulk sensitive probe of the electronic structure due to larger escape depth highly energetic electrons. In order enable HAXPES studies with high lateral resolution, we have set up dedicated energy-filtered hard photoemission electron microscope (HAXPEEM) working kinetic energies 10 keV. It is based on NanoESCA design and also preserves performance instrument in low medium energy range. this...
Cells can adapt their active contractile properties to switch between dynamical migratory states and static homeostasis. Collective tissue surface tension, generated among others by the cortical contractility of single cells, keep cell clusters compact, while a more bipolar, anisotropic is predominantly used mesenchymal cells pull themselves into extracellular matrix (ECM). Here, we investigate how these two modes relate cancer escape ECM. We compare multicellular spheroids from panel breast...
We report about a proof-of-principle experiment which explores the perspectives of performing hard x-ray photoemission spectromicroscopy with high lateral resolution. Our results obtained an energy-filtered microscope at PETRA III storage ring facility using excitation up to 6.5 keV photon energy demonstrate that it is possible obtain selected-area spectra from regions less than 500 nm in diameter.