Regensburg 2004 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 1: Polymer Surfaces I

CPP 1.1: Hauptvortrag

Montag, 8. März 2004, 09:30–10:00, H 37

Thin, nanostructured block copolymer films — •Christine M. Papadakis — Fakultät für Physik und Geowissenschaften, Universität Leipzig, now at Physik Department, Technische Universität München

Block copolymer films can be used for patterning surfaces on a submicrometer length scale. In order to understand the surface structures observed as well as their stability and their response to outer stimuli, it is important to gain knowledge both on the surface structures as well as on the inner film structure. The combination of direct visualization of the surface texture by atomic force microscopy with scattering methods elucidating the inner film structure has proven to give a wealth of information. By means of grazing-incidence small-angle X-ray scattering (GISAXS), structures normal to the substrate as well as lateral structures can be detected simultaneously. In addition, time-resolved GISAXS measurements can be used to study the structural changes of the films upon outer stimuli in-situ. In my talk, I will present results on thin films of a series of polystyrene-polybutadiene diblock copolymers, where we have found a previously unknown molar-mass dependence of the lamellar orientation. The structural changes of he films when subjected to a vapor atmosphere were monitored in-situ.