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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: POSTERS Polymerphysics

CPP 34.27: Poster

Donnerstag, 28. Februar 2008, 17:00–19:30, Poster A

Observation and visualization of block copolymer microdomain dynamics — •Eike-Christian Spitzner, Christian Riesch, Christian Dietz, Nicolaus Rehse, and Robert Magerle — Chemische Physik, TU Chemnitz, D-09107 Chemnitz

We investigate the microdomain dynamics in thin films of polystyrene-block-polybutadiene copolymers which form hexagonally ordered polystyrene cylinders in bulk. The films are swollen in chloroform vapour and observed in situ with tapping mode scanning probe microscopy. A temporal resolution of 15 s per frame is achieved. Image sequences show the dynamics of structural phase transitions and individual point defects. Phenomena such as defect annihilation, fluctuations of cylinder thickness and meandering of cylinders are of particular interest. From local Fourier transformations we obtain colour-coded maps of the cylinder orientation. With Nanotomography, consisting of consecutive steps of etching and imaging, we acquire volume images of microdomain structures.