Interface of GaP/Si(001) and antiphase boundary facet-type determination. - In: Journal of applied physics, ISSN 1089-7550, Bd. 125 (2019), 4, 045304, insges. 9 S.
https://doi.org/10.1063/1.5080547
Facile modification of freestanding silicon nitride microcantilever beams by dry film photoresist lithography. - In: Journal of micromechanics and microengineering, ISSN 1361-6439, Bd. 29 (2019), 2, 025014, S. 1-11
A photolithographic technique based on dry film photoresists for facile and low-cost patterning of microcantilever beams is presented. Dry film photoresists enable instantly homogenous photoresist coatings on flexible and 3D patterned substrate surfaces, represented here by microcantilever beams, which is otherwise challenging if conventional spin-coating of photoresist is utilized. Compared to alternative microtechnologies, such as focused ion beam milling or resist spray coating, our strategy is far less elaborate, fully compatible with routine additive and subtractive microfabrication processes and can be readily scaled. We show specifically microcantilever shape modification by CF4 reactive ion etching, localized metal deposition in combination with conventional lift-off procedures as well as a utilization of patterned dry film photoresists as permanent microstructural elements. These microstructural elements are in particular flat-ended cylindrical dry resist micropillars created at the freestanding end of the cantilever beam that can be employed as scanning probes. The resist pillars enabled imaging of a 3T3 mouse fibroblast cell culture surface to determine their elastic force constants. Alongside UV-exposure by a conventional mask aligner, we also demonstrate dry film photoresist exposure by contact-free laser lithography eliminating possible substrate damage by photomask contact.
https://doi.org/10.1088/1361-6439/aaf7e3
Highly localized SERS measurements using single silicon nanowires decorated with DNA origami-based SERS probe. - In: Nano letters, ISSN 1530-6992, Bd. 19 (2019), 2, S. 1061-1066
https://doi.org/10.1021/acs.nanolett.8b04355
Surface properties and biocompatibility of thick film materials used in ceramic bioreactors. - In: Materialia, ISSN 2589-1529, Volume 5 (2019), article 100213, 7 Seiten
https://doi.org/10.1016/j.mtla.2019.100213
Al-based binary reactive multilayer films: large area freestanding film synthesis and self-propagating reaction analysis. - In: Applied surface science, Bd. 474 (2019), S. 243-249
https://doi.org/10.1016/j.apsusc.2018.02.207
MOVPE growth of GaP/GaPN core-shell nanowires: N incorporation, morphology and crystal structure. - In: Nanotechnology, ISSN 1361-6528, Bd. 30 (2019), 10, 104002, S. 1-8
https://doi.org/10.1088/1361-6528/aaf607
Corona assisted gallium oxide nanowire growth on silicon carbide. - In: Journal of crystal growth, Bd. 509 (2019), S. 107-111
https://doi.org/10.1016/j.jcrysgro.2018.12.033
Plasma hydrogenated TiO2/nickel foam as an efficient bifunctional electrocatalyst for overall water splitting. - In: ACS sustainable chemistry & engineering, ISSN 2168-0485, Bd. 7 (2019), 1, S. 885-894
Im Titel ist "2" tiefgestellt
Electrochemical water splitting is one of the most efficient technologies for hydrogen production and fabrication of low-cost, robust, and highly active electrocatalysts. It is attractive because replacing noble metal-based materials is a key issue in current catalysis research. By using H2 plasma treatment, the TiO2/nickel foam composite is converted to be an efficient bifunctional electrocatalyst toward both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in the alkaline electrolyte. The investigation reveals the existence of abundant oxygen vacancies of TiO2, which might lead to the dramatic improvement of electrical conductivity and faster charge transfer rate; also, density functional theory (DFT) calculations suggest that the oxygen vacancies activate surrounding surface lattice oxygen to induce favorable reactive-intermediate adsorption energy of TiO2 for hydrogen evolution and adjust the strength of the chemical bonds between the TiO2 surface and reactive intermediates to more favorable values, inducing a lower energy barrier for oxygen evolution. The finding confers a unique function to TiO2 that is different from its widely accepted role as an electrocatalytically inert semiconductor material, suggesting the H2 plasma treated TiO2/nickel foam could be a bifunctional electrocatalyst for overall water splitting.
https://doi.org/10.1021/acssuschemeng.8b04496
Charge transport in GaAs nanowires: interplay between conductivity through the interior and surface conductivity. - In: Journal of physics, ISSN 1361-648X, Bd. 31 (2019), 7, 074004, insges. 7 S.
https://doi.org/10.1088/1361-648X/aaf515
57Fe Mössbauer study of epitaxial TiN thin film grown on MgO (1 0 0) by magnetron sputtering. - In: Applied surface science, Bd. 464 (2019), S. 682-691
Im Titel ist "57" hochgestellt
https://doi.org/10.1016/j.apsusc.2018.09.107