A5063711729- X-ray Diffraction in Crystallography
- Magnetic properties of thin films
- Crystallization and Solubility Studies
- Conducting polymers and applications
- Advanced Chemical Physics Studies
- Advanced Battery Materials and Technologies
- Luminescence and Fluorescent Materials
- Physics of Superconductivity and Magnetism
- Electrospun Nanofibers in Biomedical Applications
- Surface and Thin Film Phenomena
- Ionic liquids properties and applications
- Polyoxometalates: Synthesis and Applications
- Chemical Looping and Thermochemical Processes
- Tissue Engineering and Regenerative Medicine
- Catalysts for Methane Reforming
- Nanoplatforms for cancer theranostics
- Advanced Polymer Synthesis and Characterization
- Electron and X-Ray Spectroscopy Techniques
- Iron and Steelmaking Processes
- Crystal Structures and Properties
- Copper Interconnects and Reliability
- Planetary Science and Exploration
- Magnetic and transport properties of perovskites and related materials
- Reconstructive Surgery and Microvascular Techniques
- Covalent Organic Framework Applications
Universität Ulm
2021-2025
RWTH Aachen University
1980-2017
Universität Innsbruck
2007-2016
FEG Textiltechnik (Germany)
2014-2015
Direction Générale Déléguée aux Ressources
1994
Freie Universität Berlin
1990-1993
Process Research Ortech (Canada)
1993
Instituto de Ciencia de Materiales de Madrid
1993
We have explored the relationship between epitaxial growth and magnetism in case of ultrathin fcc-Co films by means a multitechnique approach. For high-quality less than 3 monolayers thick Curie temperatures ${\mathrm{T}}_{\mathrm{C}}$ are dramatically lower ${\mathrm{T}}_{\mathrm{C}}^{\mathrm{B}}$ bulk decease distinctly with film thickness. In contrast to previous claims, single monolayer appears be far below 300 K. Substrate topology is found strongly influence structural perfection which...
Sodium batteries (SBs) are a promising alternative to lithium-ion (LIBs) due the abundance, cost-effectiveness, and environmental sustainability of sodium. However, larger ionic radius Na+ leads challenges in electrode stability, limiting performance conventional inorganic cathode materials. Redox-active organic compounds, particularly π-conjugated quinones, have emerged as viable alternative, their tunable electrochemical properties, structural flexibility, enhanced compatibility with Na+....
Epitaxial thin films of cobalt ranging from 1 ML up to 10 have been grown on a Cu(100) substrate and characterized by LEED. The is found grow, adopting slight tetragonal distortion its high-temperature FCC phase. Further growth 5 Cu top Co film results in an almost perfect surface.
We report the observation of effects due to spin-orbit interaction in angle-resolved photoemission from an itinerant ferromagnet (fcc cobalt) using circularly polarized vuv synchrotron radiation. The photoelectron spectra Co 3d-band region are found depend on relative orientation sample magnetization and photon spin. This effect may be understood as a form magnetic circular dichroism appearing uv photomission regime. It used investigate phenomena ferromagnets without performing explicit...
1-Hydroxyimidazole-3-oxides (2-H, 2-Me) were alkylated with (RO) 2 SO (R =Me, Et) to give the new 1,3-di(alkyloxy)imidazolium cations which isolated as hexafluorophosphates. Ion metathesis yielded hydrophobic ionic liquids (bis(trifluoromethanesulfonyl)imides, tris(pentafluoroethyl) trifluorophosphates). Bromination afforded 2-bromo derivatives converted Ni and Pd N-heterocyclic carbene complexes by oxidative insertion. Fifteen crystal structures determined X-ray diffraction. The N-alkyloxy...
Abstract Polycrystalline material of α‐Y 2 Si O 7 has been obtained from the thermal decomposition a precursor prepared by sol‐gel process and subsequently characterized X‐ray powder diffraction Raman spectroscopy. The structure belongs to so‐called B‐type rare earth element disilicates was refined using Rietveld method. is triclinic with = 6.58620(3), b 6.62895(4), c 12.02723(7) Å, α 94.4706(4)°, β 89.0681(4)°, γ 88.2347(4)°, V 523.166(5) Å 3 , space group $P{\bar 1}$ Z 4 D x 4.39 g/cm . (R...
High suture tension is one of the causes for many wound-healing problems. Constriction tissue within loops nonelastic sutures can lead to cutting through tissues and necrosis these loops. The use elastic materials in new types could give material ability adapt requirements subsequently more vital its We evaluated foreign body host response, as indicator biocompatibility, a thermoplastic poly(carbonate) urethane (TPU) synthetic rat model compared with standard polypropylene (PP) sutures....
Sustainable battery concepts are of great importance for the energy storage demands future. Organic batteries based on redox-active polymers one class promising systems to meet these demands, in particular when combined with environmentally friendly and safe electrolytes. Deep Eutectic Solvents (DESs) represent a electrolytes that can be produced from sustainable sources exhibit most cases no or only small environmental impact. Because their non-flammability, DESs safe, while providing an...
For sustainable energy storage, all-organic batteries based on redox-active polymers promise to become an alternative lithium ion batteries. Yet, contribute the goal of cell as electrodes or solid electrolytes. Here, we replace electrolyte with a deep eutectic solvent (DES) composed sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) and N-methylacetamide (NMA), while using poly(2,2,6,6-tetramethylpiperidin-1-yl-oxyl methacrylate) (PTMA) cathode. The successful combination DES polymer...
The understanding ofitinerant ferromagnetism-usually involving a band structure approach-may be put on broader basis by considering the magnetic properties of normally inaccessible metastable crystalline phases Fe, Co and Ni. authors prepared one theses systems, namely ferromagnetic FCT cobalt, epitaxial growth typically five atomic layers onto carefully characterized Cu(001) surfaces, mapped majority minority spin bands along surface normal for first time with spin- momentum-resolved...
G-quadruplexes, alternative DNA secondary structures present in telomeres, emerge as promising targets for the treatment of cancer, because they prevent telomere elongation and accordingly cell proliferation. Within this study, theoretically validated pharmacophore- shape-based models well a docking protocol were generated applied parallel virtual screening identification novel G-quadruplex ligands. Top-ranked hits retrieved with all methods independently addition consensus approach selected...
Several applications in tissue engineering require transplantation of cells embedded appropriate biomaterial scaffolds. Such structures may consist 3D non-woven fibrous materials whereas little is known about the impact mesh size, pore architecture and fibre morphology on cellular behavior. In this study, we have developed polyvinylidene fluoride (PVDF) scaffolds with round, trilobal, or snowflake cross section different crimp patterns (10, 16, 28 needles per inch). Human mesenchymal stromal...
Polymers are increasingly employed in implant materials. To reduce the incidence of complications, which case vascular grafts include incorrect placement and restenosis, materials needed allow for image-guided implantation, as well accurate efficient postoperative imaging. We here describe amorphous fluorinated polymers based on thermoplastic polyurethane (19F-TPU), show that useful starting developing tissue-engineered can be detected using 19F MRI.
Abstract Background: Midline laparotomy wound failure like burst abdomen remains one of the major complications after abdominal surgery. The use sutures with a closer resemblance to wall physiology, elastic threads, could decrease risk these occurring. Thus, we evaluated possibility using new thread composed thermoplastic polyurethane (TPU) as suture for closure midline laparotomies compared conventionally used polypropylene (PP) in rabbit model. Methods: TPU was processed and tensile tests...
We report on the first spin- and momentum-resolved photoemission studies epitaxial f.c.c.-cobalt films above Curie temperature. In order to obtain a thorough characterization of electronic states, photoelectrons have been excited by circularly polarized VUV synchrotron radiation vectorial spin analysis has employed determine size spatial orientation photoelectron polarization. This novel experimental approach allows direct comparison spin-resolved spectra from ferromagnetic cobalt overlayer...
Step-growth dispersion polymerization is a powerful method to produce uniform and monodisperse particles of π-conjugated polymers with tunable sizes. While the growth period in such step-growth polymerizations well understood, it remains unknown whether or not nucleation process comprises an aggregation coalescence step. Only complete understanding entire mechanism particle formation during will provide information about morphology inside polymer enable design synthesis strategies give...