Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 29: POSTER: Polymer physics

CPP 29.19: Poster

Dienstag, 8. März 2005, 16:30–18:30, Poster TU D

In-situ time-resolved grazing-incidence small-angle X-ray scattering: A tool to study reorientational processes in thin diblock copolymer films — •C.M. Papadakis1, P. Busch2, D.-M. Smilgies2, D. Posselt3, and M. Rauscher41Physikdepartment E13, TU München — 2Cornell University, Ithaca NY, USA — 3Roskilde University, Denmark — 4MPI for Solid State Research, Stuttgart

Diblock copolymers in the melt spontanously self-organize into mesoscopically ordered structures. This makes them attractive candidates as templates for the patterning of surfaces. In order to understand the structure formation and the response to outer stimuli, it is important not only to know the surface structure (readily available by atomic force microscopy), but also the structure within the film.

Grazing-incidence small-angle X-ray scattering (GISAXS) offers the possibility to simultaneously gain information on the structures normal to the film surface and on lateral structures. In addition, the short measuring times make time-resolved in-situ measurements on samples in solvent vapor possible. We will present our results on lamellar polystyrene-polybutadiene diblock copolymer films, where we have found an unexpected change of the lamellar orientation as a function of block copolymer molar mass as well as significant changes upon solvent vapor treatment.

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DPG-Physik > DPG-Verhandlungen > 2005 > Berlin