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SKM 2023 – scientific programme

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O: Fachverband Oberflächenphysik

O 42: Poster: Nanostructures at Surfaces

O 42.3: Poster

Tuesday, March 28, 2023, 18:00–20:00, P2/EG

Transition Metal Nanoparticles on Graphene: Influence of Temperature — •Kai Besocke, Mahboobeh Ravankhah, and Mathias Getzlaff — Institut für Angewandte Physik, Heinrich-Heine-Universität Düsseldorf

With its unique properties, such as high quality crystal structure, excellent electrical conductivity and high tensile strength, graphene is a promising substrate for fabricating nanocomposites.

In our research on supported transition metal nanoparticles we are investigating the influence of graphene as a substrate for the deposition of metallic nanoparticles and the influence of subsequent heating. In this contribution we present our results concerning the size distribution of Fe0.5Ni0.5-Nanoparticles on CVD-graphene surfaces.

The graphene surfaces are prepared on a cobalt thin film on a W(110) substrate. The particles under investigation are produced by means of Ar magnetron sputtering in a Haberland source and aggregation takes place in a He atmosphere. We analyze the behaviour of particles several nm in diameter at temperatures up to 500 C.

Particle distributions are analyzed via STM and it will be discussed, whether the nanoparticles show different behaviour upon heating on graphene compared to other surfaces.

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