Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)

O 42.69: Poster

Mittwoch, 25. März 2009, 17:45–20:30, P2

A new in-situ X-ray diffraction setup: Electrodeposition of Zn from ionic liquids — Aparna Pareek, Dimitar Borissov, Michael Rohwerder, Dirk Vogel, and •Frank Renner — Max-Planck Institut für Eisenforschung, Max-Planck Strasse 1, 40237 Düsseldorf

To facilitate the investigation of the UHV prepared electrochemical interfaces by in situ x-ray diffraction using synchrotron radiation, an electrochemical cell setup combined with a portable UHV chamber was reported earlier. In the current work, we re-engineered the above electrochemical setup to investigate the Zn electrodeposition on the Au (111) surface from ionic liquids. Ionic liquids have very low vapor pressure, which means they can be handled in UHV environments. A smart addition of heating stage was used to overcome the problems like high viscosity and less conductivity, which are usually associated with ionic electrolytes. Furthermore, with this setup, the electrolyte contact with the sample surface can be attained in the controlled gas atmosphere. Here we report the first results of Zn electrodeposition and re-dissolution obtained using this new setup. In-situ x-ray diffraction enabled to track the initial steps of Zn deposition on the Au (111) surface, where the growth of an epitaxially ordered Zn film was observed.