A5045264214- Crystal Structures and Properties
- X-ray Diffraction in Crystallography
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Chemical Synthesis and Characterization
- Glass properties and applications
- Inorganic Fluorides and Related Compounds
- Nuclear materials and radiation effects
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Inorganic Chemistry and Materials
- Advanced Condensed Matter Physics
- Radioactive element chemistry and processing
- Crystallization and Solubility Studies
- Mineralogy and Gemology Studies
- Advanced ceramic materials synthesis
- Additive Manufacturing Materials and Processes
- Microwave Dielectric Ceramics Synthesis
- Geochemistry and Geologic Mapping
- Luminescence Properties of Advanced Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Paleontology and Stratigraphy of Fossils
- Semiconductor materials and devices
- Zeolite Catalysis and Synthesis
- Clay minerals and soil interactions
Joanneum Research
2015-2024
Universität Innsbruck
2006-2016
University of Bern
2013
Ludwig-Maximilians-Universität München
2012
University of Antwerp
2010
Institute of Metallurgy
2008
University of the Basque Country
2008
Christian Doppler Klinik
2006-2007
Christian Doppler Laboratory for Thermoelectricity
2006
Russian Academy of Sciences
2005
A first amine-templated uranyl selenate based upon highly porous nanotubules, (C4H12N)14[(UO2)10(SeO4)17(H2O)], has been prepared in the room-temperature reaction of nitrate, butylamine, and H2SeO4 aqueous solution. The structure consists nanometer-scale tubular [(UO2)10(SeO4)17(H2O)]14- units packed a hexagonal-type fashion. tubules have elliptical cross section with outer dimensions 25 x 23 = 2.5 2.3 nm. internal free crystallographic diameter is 12.6 1.26 nm, which comparable to effective...
Abstract A multi‐wavelength, visible‐Raman study of structurally different nanocrystalline diamond (NCD) films grown by means hot‐filament (HF)CVD is presented. The Raman spectra are qualitatively and quantitatively analyzed applying current interpretation models. It demonstrated that specific properties the phase as well grain boundaries can be extracted from spectra. Hydrogenated amorphous carbon detected in film's characterized regarding its hydrogen content, optical gap, sp 3 content....
An inorganic oxo salt, K5[(UO2)3(SeO4)5](NO3)(H2O)3.5, forms a structure based on nanoscale uranyl selenate tubules (see picture; • {UO78−} bipyramids, ○ {SeO42−} tetrahedra). The interiors of the nanotubules are occupied by K+ ions and H2O molecules.
Das anorganisches Oxosalz K5[(UO2)3(SeO4)5](NO3)(H2O)3.5 bildet eine Struktur aus nanometergroßen Uranylselenat-Röhrchen (siehe Bild; • {UO78−}-Bipyramiden, ○ {SeO42−}-Tetraeder). Im Innern der Nanoröhren befinden sich K+-Ionen und H2O-Moleküle.
The adsorption, bonding, defect formation, and reactivity of hydrogen on different In2O3 powder samples were studied by a combination volumetric thermal desorption, diffraction, spectroscopic techniques. Surface reduction was observed in dry up to 400 K, followed surface-near regions. Above 500 K bulk reduction, along with the formation metallic In, sets in. Raman spectra indicate considerable reordering structure this temperature regime. Despite their TPD proven presence, related adsorbed...
Abstract The new compound HP‐KB 3 O 5 was synthesized under high‐pressure/high‐temperature conditions. It is the first exhibiting all three possible conjunctions simultaneously: corner‐sharing BO groups, 4 units, as well edge‐sharing tetrahedra. Calculations of harmonic vibrational frequencies and 11 B solid‐state NMR measurements were performed for time with a
We employ atomically resolved and element-specific scanning transmission electron microscopy (STEM) to visualize in situ at the atomic scale crystallization restructuring processes of two-dimensional (2D) molybdenum disulfide (MoS2) films. To this end, we deposit a model heterostructure thin amorphous MoS2 films onto freestanding graphene membranes used as high-resolution STEM supports. Notably, during imaging energy input from beam leads beam-induced into crystalline domains, thereby...
Molybdenum disulphide (MoS 2 ) thin films have received increasing interest as device-active layers in low-dimensional electronics and also novel catalysts electrochemical processes such the hydrogen evolution reaction (HER) water splitting. For both types of applications, industrially scalable fabrication methods with good control over MoS film properties are crucial. Here, we investigate physical vapour deposition (PVD) by magnetron sputtering. thicknesses from ≈10 to ≈1000 nm were...
Titanium alloy Ti6Al4V is the most used titanium due to its high specific strength, ductility, corrosion resistance, and weldability. Currently, this produced with a density above 99% laser welding-based additive manufacturing processes. However, costs of powder are high, for critical components, excess usually not reused. In work, we characterized additively manufactured parts by reusing single batch determine impact on morphology, chemical composition, melt pool viscosity, density,...
Colorless single crystals, as well polycrystalline samples of TiTa2O7 and TiNb2O7, were grown directly from the melt prepared by solid-state reactions, respectively, at various temperatures between 1598 K 1983 K. The chemical composition crystals was confirmed wavelength-dispersive X-ray spectroscopy, crystal structures determined using single-crystal diffraction. Structural investigations isostructural compounds resulted in following basic crystallographic data: monoclinic symmetry, space...
In this study, the chemical and physical properties of sol–gel coatings were analyzed after curing with various atmospheric plasma sources.
Abstract Y 2 Si O 7 is an intriguing material combining a complex structural polymorphism with several important technological applications. Raman spectra were experimentally determined for most of the seven known modifications except form ε, and in case β, γ, δ ζ first time. The error‐prone procedure mode assignment to measured bands, usually done by comparison similar or related structures, has been replaced quantum chemical calculations polymorphs. Various functionals evaluated...
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...
Abstract The new borates Fe II 6 B 22 O 39 ⋅ H 2 (colourless) and Co (dichroic: red/bluish) were synthesised under the high‐pressure/high‐temperature conditions of GPa 880 °C (Fe)/950 (Co) in a Walker‐type multi‐anvil apparatus. compounds crystallise orthorhombic space group Pmn 1 ( Z =2) with lattice parameters =771.9(2), b =823.4(2), c =1768.0(4) pm, V =1.1237(4) nm 3 , R =0.0476, wR =0.0902 (all data) for =770.1(2), =817.6(2), =1746.9(4) =1.0999(4) =0.0513, =0.0939 O. structure type M...
The cobalt borate HP-CoB 2 O4 was synthesized from Co 3 O 4 and B under high-pressure / high-temperature conditions of 6.5 GPa 950 °C. structure is isotypic to HPNiB β -FeB , representing the third example a borate, in which every BO tetrahedron shares common edge with second one. crystallizes space group C2/c (Z = 4) parameters 934.6(2), b 562.0(2), c 443.3(1) pm, 108.2(1)°, V 0.2212(1) nm R 1 0.0218, wR 0.0410 (all data). consists layers tetrahedra, that are interconnected via strings...