Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.58: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

Ultra-High Vacuum Cluster Deposition for in-situ RHEED Studies — •Hannes Hartmann, Vladimir Popok, Stephan Bartling, Ingo Barke, and Karl-Heinz Meiwes-Broer — Institut für Physik, Universität Rostock, 18051 Rostock, Germany

Clusters and nanoparticles deposited on surfaces are of significant interest for applications in electronics, data storage, spintronics, plasmonics, and catalysis. Among a variety of methods for particle production the cluster-beam technique in connection with size selection offers several advantages. Particularly magnetron sputtering is nowadays a well established technique widely used for the production of continuous cluster beams of various species. The design and construction of a compact and flexible cluster-deposition setup is presented. Key elements are a commercial magnetron-sputtering cluster source, a five-stage differential pumping scheme, online flux measurement, and simple ion guiding. It is optimized for deposition of size-selected metal clusters ranging from a few atoms to more than 20 nm in diameter on atomically clean substrates in ultra-high vacuum. Characterization is done by flux measurement and ex-situ microscopy (AFM, TEM). First results of in-situ RHEED investigations of deposited copper nanoparticles on atomically clean surfaces are presented.