Regensburg 2004 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 15: POSTER: Polymers and Biomaterials
CPP 15.8: Poster
Tuesday, March 9, 2004, 17:00–19:00, B
Influence of substrate cleaning on the dewetting of thin polystyrene films — •E. Bauer1, M. Stamm2, and P. Müller-Buschbaum1 — 1TU München Physik Department LS E13, James-Franck-Str.1, 85747 Garching — 2IPF Dresden, Hohe Str. 6, 01069 Dresden
applications, such as coatings and dielectrics. As the first basic step in any dewetting experiment resembles the cleaning of the substrate, to guarantee equal starting conditions, we treated silicon substrates by different cleaning procedures. Next, the dewetting behavior of thin polystyrene films, spin-coated on top, was investigated by exposure to heat load. Different stages of dewetting, beginning by hole creation and ending-up with drops were observed. These structures were locally probed by AFM and additionally investigated by grazing incidence small angle x-ray scattering (GISAXS) to get a statistical relevant information about the whole sample. We observed a strong influence of the chosen surface clean on the time scales of the dewetting. This underlines the importance of giving detailed information about this preparation step to allow for a comparison of experiments.