A5067117787- Carbon Nanotubes in Composites
- Graphene research and applications
- Ion-surface interactions and analysis
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- Rare-earth and actinide compounds
- Metal and Thin Film Mechanics
- Fullerene Chemistry and Applications
- Planetary Science and Exploration
- Electrochemical Analysis and Applications
- Diamond and Carbon-based Materials Research
- Advanced Battery Materials and Technologies
- Astro and Planetary Science
- Molecular Junctions and Nanostructures
- Electrocatalysts for Energy Conversion
- Gas Sensing Nanomaterials and Sensors
- Boron and Carbon Nanomaterials Research
- Metallurgical and Alloy Processes
- Supercapacitor Materials and Fabrication
- Magnetic Properties of Alloys
- Advanced Materials Characterization Techniques
- Electronic and Structural Properties of Oxides
- Nuclear Physics and Applications
- Nanowire Synthesis and Applications
- Ionic liquids properties and applications
TU Wien
2012-2024
University of Würzburg
2024
Indian Institute of Science Education and Research Thiruvananthapuram
2024
Institute for Analytical Instrumentation
2019
University of Vienna
2012-2018
Austrian Economics Center
2018
Leibniz-Institute for New Materials
2006
RWTH Aachen University
1992-1997
Westfälische Hochschule
1996
Friedrich-Alexander-Universität Erlangen-Nürnberg
1993
A supramolecular nanoformulation for the co-delivery of MTH1 siRNA and a Fenton reagent into cancer cell is reported.
Transparent, highly percolated networks of regioregular poly(3-hexylthiophene) (rr-P3HT)-wrapped semiconducting single-walled carbon nanotubes (s-SWNTs) are deposited, and the charge transfer processes these nanohybrids studied using spectroscopic electrical measurements. The data disclose hole doping s-SWNTs by polymer, challenging prevalent electron-doping hypothesis. Through controlled fabrication, high- to low-density nanohybrid achieved, with hybrid nanotube tested as transport layers...
We investigated the effect of different electrolyte additives such as vinyl carbonate (VC), succinic anhydride (SA), and lithium bis(oxalato)borate (LiBOB) on chemical composition Solid Electrolyte Interphase (SEI) layer electrochemical performance Si/MC electrodes. The behavior electrodes was evaluated by galvanostatic charge/discharge rate capability tests. It found that various compositions result in formation resulting properties SEI with compounds. From X-ray Photoelectron Spectroscopy...
NHC-AuNPs prepared <italic>via</italic> chlorido(1,3-dimethyl-<italic>N</italic>-Boc-<italic>O</italic>-methylhistidin-2-ylidene)gold(<sc>i</sc>), an NHC–Au(<sc>i</sc>) complex, affords AuNPs containing not just Au(0), but also Au(<sc>i</sc>).
Controlled doping of carbon nanotubes is elemental for their electronic applications. Here we report an approach to tune the polarity and degree single-walled via filling with nickelocene followed by encapsulated reactions. Using Raman, photoemission spectroscopy transmission electron microscopy, show that molecules transform into nickel carbides, inner reaction temperatures as low 250 °C. The efficiency determined each chemical component. Synchronous charge transfer among molecular...
Carbon nanotubes are a natural choice as gas sensor components given their high surface to volume ratio, electronic properties, and capability mediate chemical reactions. However, realistic assessment of the interaction tube wall adsorption processes during phase reactions has always been elusive. Making use ultraclean single-walled carbon nanotubes, we have followed kinetics NO2 found physisorption mechanism. Additionally, reaction directly depends on metallic character samples....
Abstract Pyroxenes ((Ca, Mg, Fe, Mn) 2 Si O 6 ) belong to the most abundant rock forming minerals that make up surface of rocky planets and moons. Therefore, sputtering pyroxenes by solar wind ions has be considered as a very important process for modifying planetary bodies. This is increased due potential multiply charged ions; quantify this effect, wollastonite (CaSiO 3 He 2+ was investigated. Thin films CaSiO deposited on quartz crystal microbalance were irradiated, allowing precise, in...
The design of active and selective co-catalysts constitutes one the major challenges in developing heterogeneous photocatalysts for energy conversion applications. This work provides a comprehensive insight into thermally induced bottom-up generation transformation series promising Cu-based co-catalysts. We demonstrate that volcano-type HER profile as function calcination temperature is independent type Cu precursor but affected by changes oxidation state location copper species. Supported...
In the field of hard protective coatings, nano-crystalline Ti-B-N films are great importance due to adjustable microstructure and mechanical properties through their B content. Here, we systematically study this influence on during reactive as well non-reactive DC magnetron sputtering. The different deposition routes allow for an additional, very effective key parameter modify bond characteristics microstructure. Plasma analysis by mass spectroscopy reveals that comparable amounts Ti+, Ti2+,...
Understanding optical absorption in silicon nitride is crucial for cutting-edge technologies like photonic integrated circuits, nanomechanical photothermal infrared sensing and spectroscopy, cavity optomechanics. Yet, the origin of its strong dependence on film deposition fabrication process not fully understood. This Letter leverages to investigate extinction κext at a 632.8 nm wavelength low-pressure chemical vapor (LPCVD) SiN strings across wide range deposition-related tensile stresses...
We study the filling of single-walled carbon nanotubes (SW- CNTs) with ferrocene molecules. Using e-DIPS SWCNTs a mean diameter 1.7 nm, we obtain factor as high 90%. At elevated temperatures in vacuum filled are transformed to double-walled (DWCNTs). Temperature dependence inner tube growth is investigated by Raman spectroscopy. The electronic properties obtained nanostructures studied X-ray photoelectron spectroscopy and near edge absorption fine structure It found that temperature higher...
Precise control of tensile stress and intrinsic damping is crucial for the optimal design nanomechanical systems sensor applications quantum optomechanics in particular. In this letter we study uence oxygen plasma on silicon nitride resonators. Oxygen treatments are common steps micro nanofabrication. We show that only a few minutes oxidizes surface, creating several nanometer thick dioxide layers with compressive 1.30(16)GPa. Such oxide can cause reduction e ective 50 nm stoichiometric...
Water electrolysis is one of the most capable processes for supplying clean fuel. Herein, two novel ionic Ru(II)-Fe(II) complexes, [Ru(tmphen)3]2[Fe(CN)6] and [Ru(phen)3][Fe(CN)5(NO)], where tmphen = 3,4,7,8-tetramethyl-1,10-phenanthroline phen 1,10-phenanthroline, were synthesized characterized by UV-Vis spectroscopy, elemental analysis, FT-IR, single-crystal X-ray structural analysis. By thermally decomposing complex at 600 °C 4 h, a heterostructured RuO2-Fe2O3 nanocomposite was fabricated...
Abstract We present a stepwise in situ filling of metallic single‐walled carbon nanotubes (SWCNTs) with mean diameter 1.4 nm metallocenes and concomitant characterisation their electronic properties using photoemission spectroscopy (PES) X‐ray absorption (XAS) without breaking the ultra‐high vacuum environment. The changes SWCNTs' structure upon ferrocene (FeCp 2 ) are suggested by broadening C 1s spectral line. Weak n‐type charge transfer from to SWCNT is evidenced reduction intensity first...
Abstractauthoren We have filled single-walled carbon nanotubes (SWCNTs) with nickelocene and transformed them to double-walled by annealing in vacuum. study the temperature-dependent inner tube growth means of Raman spectroscopy investigate SWCNTs' electronic structure X-ray photoelectron spectroscopy. It is found that larger diameter tubes grow at higher temperatures than smaller tubes. Both electron hole doping SWCNTs are achieved as encapsulated molecules reacted range from 250 up 1200° C.
Pristine single-walled carbon nanotubes (SWCNTs) are rather inert to O$_2$ and N$_2$, which for low doses chemisorb only on defect sites or vacancies of the SWCNTs at ppm level. However, very doping has a major effect electronic properties conductivity SWCNTs. Already (80 L), X-ray photoelectron spectroscopy (XPS) O 1s signal becomes saturated, indicating nearly all SWCNT's have been oxidized. As result, probing vacancy oxidation via XPS yields spectra with signal-to-noise ratios, even...
In this work, the supported ionic liquid phase (SILP) method was applied for immobilization of a newly developed, well-defined hydride Fe(<sc>ii</sc>) PNP pincer complex dissolved an in (IL) onto polymer-based spherical activated carbon.