Berlin 2008 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Molecular Dynamics

CPP 37.3: Talk

Friday, February 29, 2008, 11:00–11:15, C 230

Interfacial dynamics of polymers in contact with solid substrates — •Anatoli Serghei and Friedrich Kremer — University of Leipzig, Linnestr. 5, Leipzig, 04103, Germany

Polymers exhibit alterations of their microscopic (and hence macroscopic) properties in the vicinity of solid interfaces. In the present contribution a novel experimental approach is demonstrated which enables one to investigate molecular fluctuations of polymer segments in the immediate (nanometric) vicinity of solid substrates. This development, employing nanostructures as spacers, renders to Broadband Dielectric Spectroscopy - traditionally a volume specific technique - the ability to measure the interfacial dynamics of organic materials in contact with solid substrates. The method readily allows to adjust the interfacial interactions by a controlled deposition of various (metallic but as well organic) layers onto the surface of the supporting electrodes. Experimental results on the interfacial dynamics of several polymers will be discussed, in systematic dependence on the interfacial interactions.