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 42.1: Poster

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

Realization of Large-Scale Nano-Patterned Surfaces by the UTAM-Technique — •Stefan Ostendorp, Yong Lei, and Gerhard Wilde — Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany

Using an UTAM (ultra-thin alumina membrane) surface nano-patterning technique, large-scale arrays of highly regular metallic and semiconductor nano-particles were fabricated on silicon and sapphire substrates. The structural parameters of the synthesized nano-particles are controllable, including the diameter, spacing, and shape. Different metallic nano-particles have been oxidized using a well-controlled oxidation process in a modified CVD-system. The aim of the experiment is to obtain a core-shell nanostructure with a metallic core and an oxide shell. During the oxidation of some metallic nano-particles (chromium and nickel) on a silicon substrate, an interesting nano-porous silicon oxide surface structure with embedded metallic oxide nano-particles evolved. These surface nano-porous structures are under investigation now by AFM, EFM, SEM and TEM to determine the details of their growth mechanism.