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 42.120: Poster

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

Growth of magnetic clusters on a moiré pattern of graphene on Ru(0001) — •Simon Altenburg, Martin Ziegler, Jörg Kröger, and Richard Berndt — Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany

Large areas of highly ordered single layer graphene were grown on a Ru(0001) surface by controlled segregation of Carbon from the bulk. The resulting moiré superstructure was atomically resolved by scanning tunnelling microscopy. We find that the moiré pattern acts as a template for the growth of Co clusters: Depositing Co onto the graphene layer gives rise to Co islands whose lateral dimensions are determined by the moiré pattern. The dependence of the Co island dimensions on deposition temperature and coverage was investigated. Funding by the Deutsche Forschungsgemeinschaft through SFB 668 is acknowledged.