A5082978266- Shape Memory Alloy Transformations
- Ion-surface interactions and analysis
- Metal and Thin Film Mechanics
- High Entropy Alloys Studies
- Corrosion Behavior and Inhibition
- Electrocatalysts for Energy Conversion
- Laser Material Processing Techniques
- Chalcogenide Semiconductor Thin Films
- High-Temperature Coating Behaviors
- Quantum Dots Synthesis And Properties
- Metalloenzymes and iron-sulfur proteins
- Titanium Alloys Microstructure and Properties
- Advanced Photocatalysis Techniques
- Adhesion, Friction, and Surface Interactions
- Hydrogen embrittlement and corrosion behaviors in metals
- Gold and Silver Nanoparticles Synthesis and Applications
- Nonlinear Optical Materials Studies
- Integrated Circuits and Semiconductor Failure Analysis
- Physics of Superconductivity and Magnetism
- Microstructure and Mechanical Properties of Steels
- Malaria Research and Control
- Advanced Memory and Neural Computing
- Diamond and Carbon-based Materials Research
- Ferroelectric and Piezoelectric Materials
- Advanced Materials Characterization Techniques
Schott (Germany)
2015-2024
Chemnitz University of Technology
2020-2024
Friedrich Schiller University Jena
2013-2023
Chemnitzer Werkstoffmechanik GmbH (Germany)
2021
Schiller International University
2009-2015
Leibniz Institute for Solid State and Materials Research
2014
Helmholtz-Zentrum Hereon
2014
Universität Hamburg
2014
University Medical Center Hamburg-Eppendorf
2014
FHNW University of Applied Sciences and Arts
2014
Recent experiments have evidenced sub-nanometer resolution in plasmonic-enhanced probe spectroscopy. Such a high cannot be simply explained using the commonly considered radii of metallic nanoparticles on plasmonic probes. In this contribution effects defects as small single atom found spherical particles acting probing tips are investigated connection with spatial provided. The presence abundant edge and corner sites atomic scale dimensions crystalline is evident from transmission electron...
Gametocyte maturation in Plasmodium falciparum is a critical step the transmission of malaria. While majority parasites proliferate asexually red blood cells, small fraction undergo sexual conversion and mature over 2 weeks to become competent for mosquito vector. Immature gametocytes sequester deep tissues while stages must be able circulate, pass spleen present themselves vector order complete transmission. Sequestration asexual cell stage has been investigated great detail. These studies...
The basic physical mechanisms of damage formation in semiconductors due to swift heavy ion (SHI) irradiation are not yet fully understood. In the present paper evolution and tracks during SHI InP, InSb, GaAs, GaP, Ge investigated for with Xe or Au ions having specific energies ranging from about 0.8 3 MeV/u. Based on these experimental results those obtained by other authors cluster-ion Ge, Si, extensive calculations were performed framework thermal spike model. As we published previously,...
Abstract In this contribution, chemical, structural, and mechanical alterations in various types of femtosecond laser-generated surface structures, i.e., laser-induced periodic structures (LIPSS, ripples), Grooves, Spikes on titanium alloy, are characterized by analytical techniques, including X-ray diffraction glow-discharge optical emission spectroscopy. The formation oxide layers the different laser-based inherently influences friction wear performance as demonstrated oil-lubricated...
Irradiation of single-crystalline InP with swift heavy ions (SHI's) causes the formation ion tracks for certain irradiation temperatures if electronic energy deposition exceeds a threshold value. With increasing SHI fluence, more and are formed, until continuous amorphous layer is produced due to multiple overlapping at high fluences. Single-crystalline samples were irradiated either liquid nitrogen temperature (LNT) or room (RT) Kr, Xe, Au specific energies ranging from ca....
Artesunate (ART) is widely used for the treatment of malaria, but mechanisms its effects on parasitized red blood cells (RBCs) are not fully understood. We investigated ART's influence dynamic deformability ring-stage Plasmodium falciparum infected (iRBCs) in order to elucidate role cellular mechanobiology. The RBCs was measured by passing them through a microfluidic device with repeated bottleneck structures. quasi-static measurement performed using micropipette aspiration. After ART...
Superficial amorphization and re-crystallization of silicon in <111> <100> orientation after irradiation by femtosecond laser pulses (790 nm, 30 fs) are studied using optical imaging transmission electron microscopy. Spectroscopic ellipsometry (SIE) allows fast data acquisition at multiple wavelengths provides experimental for calculating nanometric amorphous layer thickness profiles with micrometric lateral resolution based on a thin-film model. For radially Gaussian beam...
High-entropy alloys (HEAs) with their almost limitless number of possible compositions have raised widespread attention in material science. Next to wear and corrosion resistive coatings, application as tunable electrocatalysts has recently moved into the focus. On other hand, fundamental properties HEA surfaces like atomic electronic structure, surface segregation diffusion well adsorption on are barely explored. The lack research is caused by limited availability single-crystalline...
Abstract Medical grade Ni‐Ti alloys with shape memory or pseudo‐elastic behavior exhibit good biocompatibility because of an electrochemically passive oxide layer on the surface. In this work, mechanical stability surface layers is investigated during reversible deformation commonly applied medical wires. Surface varying thickness were generated by annealing times under air atmosphere. The thicknesses determined means Rutherford backscattering spectrometry. situ scanning electron microscopy...
Abstract After annealing at 540°C, NiTi is covered by a characteristic oxide layer with an Ni‐containing outer and Ni‐free inner titanium region. To elucidate details of the yet unclear formation process, samples were annealed in atmosphere containing different oxygen isotopes time analyzed nondestructive ion beam techniques stages oxidation. During heating stage, permeable “low Ni” forms, grows inward. Subsequently, when temperature 540°C reached, stoichiometric forms inhibits transport...
The corrosion behaviour of a Fe81Cr15V3C1 steel was analysed compared to commercial X90CrMoV18 (1.4112) in 0.01-1 mol/L H2SO4 solutions. rapidly cooled comprises martensite dendrites, carbide networks (M7C3, MC) and austenite interdendritic areas. Electrochemical measurements with surface analysis (SEM, EDX, AES, GD-OES) revealed the phase impact on corrosion. Active occurs at martensite-carbide boundaries leading narrow bands. A unique oxidation between passivity transpassivity dissolution...
Abstract Understanding the martensitic microstructure in nickel–titanium (NiTi) thin films helps to optimize their properties for applications microsystems. Epitaxial and single-crystalline can serve as model systems understand microstructure, well exploit anisotropic mechanical of NiTi. Here, we analyze growth NiTi on MgO(100) Al 2 O 3 (0001) substrates film buffer deposition conditions achieve epitaxial (100)- (111)-orientation. On MgO(100), compare transformation behavior crystal quality...