A5073354743- Medical Practices and Rehabilitation
- Physics and Engineering Research Articles
- Health and Medical Studies
- Medical and Health Sciences Research
- Ferroelectric and Piezoelectric Materials
- Electronic and Structural Properties of Oxides
- Engineering and Materials Science Studies
- Biomedical and Chemical Research
- Acoustic Wave Resonator Technologies
- Semiconductor materials and devices
- Consumer behavior in food and health
- Advanced Memory and Neural Computing
- Peripheral Artery Disease Management
- Metabolism and Genetic Disorders
- Hematological disorders and diagnostics
- Solid-state spectroscopy and crystallography
- X-ray Diffraction in Crystallography
- Cerebrovascular and Carotid Artery Diseases
- Vasculitis and related conditions
- German Literature and Culture Studies
- Cardiac pacing and defibrillation studies
- Renal function and acid-base balance
- Public Administration and Political Analysis
- Medical Imaging and Pathology Studies
- Advanced MEMS and NEMS Technologies
TU Bergakademie Freiberg
2016-2025
Humboldt-Universität zu Berlin
2024
Institute of Experimental Physics of the Slovak Academy of Sciences
2024
Charité - Universitätsmedizin Berlin
2024
Freie Universität Berlin
2024
Leibniz Institute of Photonic Technology
2019
Chemnitz University of Technology
2016-2019
Helmholtz-Zentrum Dresden-Rossendorf
2019
Fraunhofer Institute for Electronic Nano Systems
2019
Energy Storage Systems (United States)
2018
Measurements of the low-field ac susceptibility on ternary alloys Pd + 0.35 at.% Fe and a Mn concentration 0 to 8 reveal, for three distinct regimes concentration, (a) giant-moment ferromagnetism, (b) high-temperature ferromagnetic phase followed by lower-temperature spin-glass transition, (c) phase. Our results $T\ensuremath{-}c$ diagram are satisfactorily explained theory Sherrington Kirkpatrick.
The precise quantification of the pyroelectric coefficient p is indispensable for characterization materials and development pyroelectric-based devices, such as radiation sensors or energy harvesters. A summary variety techniques to measure given in present review. It provides a classification after thermal excitation an outline capabilities drawbacks individual techniques. main selection criteria are: possibility separate different contributions coefficient, exclude thermally stimulated...
Pulsed laser deposited Au-BFO-Pt/Ti/Sapphire MIM structures offer excellent bipolar resistive switching performance, including electroforming free, long retention time at 358 K, and highly stable endurance. Here we develop a model on modifiable Schottky barrier heights elucidate the physical origin underlying in BiFeO3 memristors containing mobile oxygen vacancies. Increased speed is possible by applying large amplitude writing pulse as tunable both length of pulse. The local has been...
β-Chitinous scaffolds isolated from the skeleton of marine cephalopod Sepia officinalis were used as a template for in vitro formation ZnO under conditions (70 °C) which are extreme biological materials. Novel β-chitin/ZnO film-like composites prepared first time by hydrothermal synthesis, and thoroughly characterized using numerous analytical methods including Raman spectroscopy, HR-TEM XRD. We demonstrate growth hexagonal nanocrystals on β-chitin substrate. Our chitin/ZnO presented this...
Chitinous scaffolds isolated from the skeleton of marine sponge Aplysina cauliformis were used as a template for in vitro formation zirconium dioxide nanophase ammonium zirconium(IV) carbonate (AZC) under extreme conditions (150 °C). These novel zirconia–chitin based composites prepared first time using hydrothermal synthesis, and thoroughly characterized plethora analytical methods. The thermostability chitinous 3D matrix makes it ideal use synthesis monoclinic nanostructured precursors...
The characteristic mineral-free fibrous skeletons (made of structural protein-spongin) <italic>H. communis</italic> (Demospongiae: Porifera) was used as a template in hydrothermal synthesis hematite (α-Fe<sub>2</sub>O<sub>3</sub>) nanoparticles.
The disinfection of bacteria by thermally excited pyroelectric materials in aqueous environments provides opportunities for the development new means sanitization. However, little is known about formation reactive oxygen species (ROS) at surface materials. To investigate pyroelectrically driven ROS generation we performed OH radical specific measurements stimulated barium titanate nanoparticles contact with palladium nanoparticles. Through electron spin resonance trap BMPO...
Chitin of poriferan origin is a unique and thermostable biological material. It also represents an example renewable materials source due to the high regeneration ability Aplysina sponges under marine ranching conditions. Chitinous scaffolds isolated from skeleton sponge aerophoba were used as template for in vitro formation Fe2O3 conditions (pH ∼ 1.5, 90 °C) which are extreme materials. Novel chitin–Fe2O3 three dimensional composites, have been prepared first time using hydrothermal...
Diatoms are considered unicellular eukaryotic organisms exclusively depositing biogenic silica. Heretofore there has been no report of calcification by these algae. Here it is shown that calcium carbonate within the stalks Didymosphenia geminata , a nuisance species prolifically colonized streams and rivers globally, in origin occurs as network calcite nanofibers. The nanofibrous framework mineralized polysaccharide matrix imparts mechanical support to stalks, providing stability variable...
Ferroelectricity in hafnium oxide thin films is known to be induced by various doping elements and solid-solution with zirconia. While a wealth of studies focused on their basic ferroelectric properties memory applications, thorough the related pyroelectric application potential are only rarely found. This work investigates impact Si phase composition ferro- as well film capacitors. Dynamic hysteresis measurements field-free Sharp-Garn method were used correlate reported orthorhombic...
Rechargeable aluminum batteries are promising candidates for post-lithium energy storage systems. The electrolyte system of rechargeable is an urgent research topic hindering the deployment in large-scale applications. To solve critical problems current ionic liquid electrolytes, such as leakage, corrosivity, and need using separators, we developed a freestanding polymer direct complexation polyamide 6 (PA6) with chloride (AlCl3) organic salt triethylamine hydrochloride (Et3NHCl). This...
Local reversible structural changes in ${\mathrm{SrTiO}}_{3}$ single crystals an external electric field are induced by oxygen redistribution. We present situ x-ray diffraction measurements during and immediately after electroformation. Several reflections monitored show elongation of the cubic unit cell strontium titanate. Raman investigations verify that expansion involves a transition from centrosymmetric to lower symmetry phase. During complete formation cycle, including hold time...
Defect engineering is an effective and powerful tool to control the existing material properties produce completely new ones, which are symmetry-forbidden in a defect-free crystal. For example, application of static electric field single crystal SrTiO3 forms strained near-surface layer through migration oxygen vacancies out area beneath positively charged electrode. While it was previously shown that this phase holds pyroelectric properties, centrosymmetric bulk SrTiO3, paper reports same...
The presented work sets out to investigate the dehydrogenation behaviour of Ca(AlH 4 ) 2 + MCl (M = Li, Na) mixtures. In contrast by-product NaCl, which does not affect...
A (001) ${\mathrm{SrTiO}}_{3}$ wafer has been investigated in situ at room temperature under application of a static electric field varying polarity by fluorescence x-ray absorption near edge structure (XANES) analysis the Sr-$K$ and Ti-$K$ edges. The XANES spectra show clear shift energy. is attributed to change Ti valence state volume invoked diffusion oxygen ions vacancies. No was observed for Theoretical calculations support these findings.
Vacuum annealing is a widely used method to increase the electric conductivity of SrTiO3 single crystals. The induced oxygen vacancies act as intrinsic donors and lead n-type conductivity. Apart from changed electronic structure, however, also crystal structure modifications arise this treatment. Hence, properties are determined by interplay between point defects line defects. present paper provides survey real commercially available crystals changes reducing vacuum heat-treatment....
The current work presents the results of a study thermal stability metastable ω ‐Ti(Fe) produced by high‐pressure torsion process and describes phase transformations upon heating. titanium alloys under contain between 1 7 wt% iron, transitions are investigated using combination in situ high‐temperature X‐ray diffraction differential scanning calorimetry. reveals sequence → α' α + β calorimetry shows that first transformation is exothermal temperature this transition independent iron...