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DS: Dünne Schichten
DS 23: Postersitzung I
DS 23.46: Poster
Friday, March 4, 2005, 16:00–18:30, Poster TU B
Selforganized nanostructuring of organic monolayers — •Michael Hirtz1,2, Lifeng Chi1,2, and Harald Fuchs1,2 — 1Physical Institute, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster — 2Center for Nanotechnology (CeNTech), Gievenbecker Weg 11, 48149 Münster
The Langmuir-Blodgett technique provides a powerful tool for the preparation of monomolecular layers with a controlled thickness and composition. In our laboratory extensive research effort has been devoted to the formation of self-organized nanostructures via the LB transfer of the fatty acid-type molecule DPPC (dipalmitoylphosphatidylcholine). The obtained patterns were studied by Atomic Force Microscopy. Here we present the formation of nanoscale stripe patterns of DPPC monolayers on a silicon substrate. The observed patterns, which were produced by the LB technique, were found to vary with transfer speed, area pressure and temperature as well as different substrates (silicon, mica). Ongoing research is aimed at elucidating the effect of different substrate treatments (e.g. RCA treatments, O2-Plasma) on the pattern formation. The different treatments change the surface energy of the silicon substrate and are therefore expected to have an influence on the pattern formation.