A5090450452- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Advanced Materials Characterization Techniques
- Force Microscopy Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Organic Electronics and Photovoltaics
- Integrated Circuits and Semiconductor Failure Analysis
- Gas Sensing Nanomaterials and Sensors
- Thin-Film Transistor Technologies
- Ion-surface interactions and analysis
- Nanofabrication and Lithography Techniques
- Magnetic and transport properties of perovskites and related materials
- Quantum, superfluid, helium dynamics
- nanoparticles nucleation surface interactions
- Surface and Thin Film Phenomena
- Analytical Chemistry and Sensors
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Nuclear Physics and Applications
- Advanced Condensed Matter Physics
- Machine Learning in Materials Science
- Advancements in Solid Oxide Fuel Cells
- Advanced materials and composites
- X-ray Diffraction in Crystallography
- Conducting polymers and applications
Austrian Centre for Electron Microscopy and Nanoanalysis
2016-2025
Graz University of Technology
2015-2025
Czech Academy of Sciences, Institute of Analytical Chemistry
2023
Institute of Solid State Physics
2016-2019
University of Graz
2015
AGH University of Krakow
2006
Lawrence Berkeley National Laboratory
2000-2002
University of California, Berkeley
2000-2002
Chalmers University of Technology
1999
Elemental mapping using energy-dispersive x-ray spectroscopy in scanning transmission electron microscopy, a well-established technique for precision elemental concentration analysis at submicron resolution, was first demonstrated atomic resolution 2010. However, to date maps have only been interpreted qualitatively because the elastic and thermal scattering of probe confounds quantitative analysis. Accounting this scattering, we present absolute scale comparisons between experiment quantum...
Abstract Lithium iron phosphate (LiFePO 4 , LFP) serves as a crucial active material in Li‐ion batteries due to its excellent cycle life, safety, eco‐friendliness, and high‐rate performance. Nonetheless, debates persist regarding the atomic‐level mechanisms underlying electrochemical lithium insertion/extraction process associated phase transitions. A profound clarity on fundamental storage within LFP is achieved through meticulous scanning transmission electron microscopy (STEM) selected...
Electron energy-loss spectroscopy (EELS) is an analytical technique that based on inelastic scattering of fast electrons in a thin specimen. In transmission electron microscope (TEM) it can provide structural and chemical information about specimen, even down to atomic resolution. This review provides overview the physical basis new developments applications EELS scanning microscopy. Recent advances elemental mapping, spectrum imaging plasmonic structures quantitative analysis atomically...
We report on the formation of one-dimensional Au/Ag core-shell nanostructures in superfluid helium nanodroplets $({\mathrm{He}}_{N})$ and their subsequent surface deposition under soft landing conditions. In vortex charged ${\mathrm{He}}_{N}$, dopant atoms clusters prefer to agglomerate along cores, which serve as personal cryo-templates for each nanowire. A sequential pickup scheme enables fabrication structures with either Au core Ag shell or vice versa. The structure is both cases shown...
The degradation of ultrathin silver nanowires grown in helium nanodroplets is tracked experimentally and identified as Rayleigh breakup by application a computational model.
We present a first investigation of structural properties Ag clusters with diameter up to 5.5 nm grown inside superfluid helium nanodroplets (HeN) and deposited on an amorphous C surface. With high resolution transmission electron microscope images we are able show that in addition the crystalline face centered cubic (fcc) structure, noncrystalline icosahedral (Ih), decahedral (Dh) morphologies grown. Relative abundances (56% fcc, 31% Dh, 13% Ih) as well size distribution each morphology...
We report on conductometric gas sensors based single CuO nanowires and compare the carbon monoxide (CO) sensing properties of pristine as well Pd nanoparticle decorated devices in humid atmosphere. Magnetron sputter inert aggregation combined with a quadrupole mass filter for cluster size selection was used single-step deposition soft landing regime. Uniformly dispersed, crystalline nanoparticles size-selected diameters around 5 nm were deposited nanowire four point configuration. During...
Self-generated Ba(Ce,Fe,In)O3-δ composites were prepared by one-pot sol-gel synthesis. They consist of Ce-rich and Fe-rich phases, are intended to supply the required protonic electronic transport for air electrode materials in ceramic fuel electrolysis cells (PCFC, PCEC). Crystal structure, lattice parameters, relative phase amounts obtained from X-ray diffraction. The local chemical composition distribution cations within individual phases characterized scanning transmission electron...
An organic field-effect transistor can be switched chemically from depletion (normally on) to enhancement off) mode by inserting a reactive thin layer comprising sulfonyl chloride and sulfonic acid functionalities. Upon exposure of the devices alkaline gases, such as ammonia, shift threshold voltage up 60 V is achieved.
A nanoimprinting process that enables fabrication of self-aligned p- and n-type organic thin film transistors with small channel lengths is presented. Nanoimprint lithography back-side exposure permit precise definition the length down to submicrometer regime a diminutive gate source/drain overlap. The manufacturing transistor setups minimized electrode overlaps resulting in distinct decrease parasitic capacitances considerable increase transition frequency. Fully functional OTFTs...
Abstract Hard metals are in great demand areas that require high hardness and wear resistance. Tungsten carbide excels this area, especially with cobalt as a binder phase [1, 2]. For microstructural characterization, choosing an applicable preparation method is the most essential step. Publications concerning WC-Co materials were published by National Physical Laboratory Teddington, England, notably Prof. B. Roebuck, though influence of methods was not entirely explored. Electron backscatter...
Silver and gold nanowires are grown within superfluid helium nanodroplets investigated by high resolution electron microscopy after surface deposition. The wire morphologies depend on the rate of metal atom doping in pickup sequence. While rates result a polycrystalline face-centered cubic nanowire structure, at lower initial fivefold-symmetry seems to be preserved. An explanation for this observation is given computer simulations, which allow derivation timescales growth process inside nanodroplets.
Low-frequency noise properties of single CuO nanowire devices were investigated under gas sensor operation conditions in dry and humid synthetic air at 350 °C. A 1/f spectrum was found with the normalized power spectral density current fluctuations typically a factor 2 higher for compared to atmosphere. core-shell model is proposed treat as parallel combination gas-independent bulk gas-dependent surface components. The observed increase presence water vapor explained terms Hooge's mobility...