Regensburg 2007 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 30: Poster II

DY 30.66: Poster

Thursday, March 29, 2007, 16:00–18:00, Poster D

Dynamics in Thin Films of Blockcopolymer — •Peter Fey, Sabine Scherdel, Marcus Böhme, Nicolaus Rehse, and Robert Magerle — Chemische Physik, TU Chemnitz, D-09107 Chemnitz

Thin films of blockopolymer are of scientific interest because their structure can easily be adjusted. Their dynamics can be controlled by solvent vapors. We observe the surfaces of thin films of blockopolymer with tapping mode scanning probe microscopy (TM-SPM). TM-SPM allows in-situ observations of the polymer film under solvent vapor atmosphere and gives information about the topology as well as mechanical properties of the surface. At the given volume ratio of the two blocks typical surface structures include lamellae, perforated lamellae, and cylinders oriented perpendicular or parallel to the surface, depending on film thickness and the solvent vapor pressure.

In our work we mainly focus on cylinders parallel to the surface. These cylinders show characteristic fluctuations close to the phase transition in width and orientation. We examine these fluctuations for typical periodicies using image processing algorithms.