Regensburg 2007 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 44: Poster Session II (Semiconductors; Oxides and Insulators: Adsorption, Clean Surfaces, Epitaxy and Growth; Surface Chemical Reactions and Heterogeneous Catalysis; Surface or Interface Magnetism; Solid-Liquid Interfaces; Organic, Polymeric, Biomolecular Films; Particles and Clusters; Methods: Atomic and Electronic Structure; Time-resolved Spectroscopies)

O 44.14: Poster

Mittwoch, 28. März 2007, 17:00–19:30, Poster C

Complex Structures in Multilayer Polymer-Blends on Glass Substrates — •Hubertus Marbach, Florian Maier, and Hans-Peter Steinrück — Universität Erlangen-Nürnberg, Lehrstuhl für Physikalische Chemie II, Egerlandstraße 3, D-91058 Erlangen, Germany

Recently, multicomponent polymer systems have attracted attention due to their capability to form a wealth of structures in thin films on various substrates. The three-dimensional morphology of these structures depends on the phase separation processes of the polymers involved, and on the corresponding experimental parameters and procedures, such as the polymer mixture, the spin coating parameters, thermal treatments, etc.. In the present paper we focus on layer systems of a mixture of polymethylmethacrylate and polysterene (PMMA/PS) on glass slides. The polymer-blend fims were prepared by a spin-coating technique and interjacent thermal treatments. The resulting rich variety of complex structures was characterized by means of atomic force microscopy under ambient conditions. In addition, the exposure of the PMMA/PS films to cyclohexane leads to the selective dissolution of PS. This enables the identification of the features attributed to PS (or PMMA) and serves as the starting point for the generation of even more complex structures. The main findings of systematic measurements will be presented and the underlying mechanisms will be dicussed.