Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)

O 34.8: Poster

Dienstag, 27. März 2012, 18:15–21:45, Poster E

Graphene as a supporting layer for nanoparticles — •Torsten Veltum, Wolfgang Rosellen, Hendrik Bettermann, and Mathias Getzlaff — Institute of Applied Physics, University Duesseldorf

In the past few years graphene has gained the attention of scientists due to its unique mechanical and electrical properties. On the other hand, fabrication and deposition of nanoparticles on a substrate is of great interest for studies of, e.g. model catalysts. In this study we want to get a better understanding of the interaction between the nanoparticles and graphene substrate.

A thin Ni(111) film is prepared by electron beam evaporation on a W(110) crystal under ultra-high vacuum conditions. To achieve a structurally ordered monolayer graphene on the ferromagnetic substrate we use chemical vapor deposition with propylene. The structure of the thin film system is characterized in-situ by means of scanning tunneling microscopy (STM), low energy electron diffraction (LEED) and auger electron spectroscopy (AES).

The well-characterized FeCo nanoparticles are produced by a continuously working arc cluster ion source (ACIS), mass-selected by an electrostatic quadrupole (Δ m/m = 10%) and subsequently deposited on the single-layer graphene under softlanding conditions. The structural analysis of the nanoparticles is carried out by STM.