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Habouti S.,Institute for Materials and Surface Technology IMST | Es-Souni M.,Institute for Materials and Surface Technology IMST
CrystEngComm | Year: 2014

On-glass-substrate gold nanorods (Au-NRs) are processed via electrodeposition into anodized alumina template films that were fabricated using an Al/Au/Ti film stack on glass. The Au-NRs are capped with VO2 nanoparticles obtained from sputtered vanadium caps. The nanostructure arrays show intense plasmon resonance and are thermochromic with VO2 size dependent transition temperature. © the Partner Organisations 2014.


Minch R.,Institute for Materials and Surface Technology IMST | Es-Souni M.,Institute for Materials and Surface Technology IMST
CrystEngComm | Year: 2013

A versatile and cost-effective electrochemical approach for VO2 thin film preparation is reported. Cathodic deposition is carried out potentiostatically at room temperature from an ethanolic solution of VOSO 4 containing small amounts of water. Neither pH nor temperature control of the electrolyte is necessary. Nanostructured films of vanadium dioxide with typical thermochromic behaviour are obtained. © 2013 The Royal Society of Chemistry.


Minch R.,Institute for Materials and Surface Technology IMST | Es-Souni M.,Institute for Materials and Surface Technology IMST
Chemical Communications | Year: 2011

We report on a versatile approach for preparing on-substrate, self-standing and hollow-wall nanotubes (NTs) of Pt and PtRu-alloys. The method takes advantage of wet chemically processed ZnO-NTs that are used as sacrificial templates for electrodeposition. The electrocatalytic activity of these Pt-based NTs is exemplary demonstrated on the electro-oxidation of methanol. © 2011 The Royal Society of Chemistry.


Minch R.,Institute for Materials and Surface Technology IMST | Es-Souni M.,Institute for Materials and Surface Technology IMST
Journal of Materials Chemistry | Year: 2011

A facile electrochemical processing method for Pt-based nanostructures with high surface area and a broad range of possible applications is proposed, based on sacrificial ZnO nanostructures. At first, ZnO-nanorods and nanobelts were grown on a TiO 2 terminated steel substrate via a fast wet chemical method and subsequently sputter coated with an ultra-thin gold film to ensure electrical contact. These nanostructured substrates were used as electrodes for Pt electrodeposition. It is shown that ZnO was dissolved while Pt-nanoparticles nucleated and grew, replicating the ZnO nanostructure morphology. In this way we could process closed Pt-nanorods with morphologies reminiscent to pillar coral, and Pt-nanobelts with a sponge-like topology. In comparison to commercial catalysts like Pt/C30, the nanostructures obtained are characterized by higher real surfaces, higher efficiency for methanol electrooxidation and higher resistance to poisoning by carbonaceous species, and so should be promising as electrodes in direct methanol oxidation fuel cells. © 2011 The Royal Society of Chemistry.

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