Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 69: Nanostructures at Surfaces: Dots, Particles, Clusters

O 69.10: Poster

Mittwoch, 9. März 2016, 18:15–20:30, Poster A

3d metal naoparticles deposited on graphene — •Torsten Veltum, Wolfram Gilbert, Hendrik Bettermann, and Mathias Getzlaff — Institut für Angewandte Physik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf

In the past few years graphene gained the attention of scientists due to its unique mechanical and electrical properties. In addition to this, fabrication and deposition of nanoparticles on a substrate is of great interest for studies, e.g. as model catalysts. In this contribution we compare the properties of nanoparticles deposited on graphene with those on a 3d metallic thin film.

A thin cobalt film is epitaxially grown by electron beam evaporation on a W(110) single crystal under ultra-high vacuum conditions. To achieve a structurally ordered monolayer graphene on the ferromagnetic substrate we use chemical vapour deposition with propylene. The structure of this system is characterized in-situ by means of scanning tunnelling microscopy (STM) and low energy electron diffraction (LEED).

The nanoparticles are produced using two different gas aggregation sources, an arc cluster ion source (ACIS) and a magnetron sputter aggregation source (Haberland type), with different size distributions and subsequently mass-selected. After the deposition on the sample under softlanding conditions, the structural analysis of the nanoparticles is carried out by STM.