Dresden 2009 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: POSTERS Interfaces and Thin Films
CPP 28.13: Poster
Wednesday, March 25, 2009, 17:00–19:00, P3
Application of in-situ ellipsometry for the investigation of stimuli-responsive polymer brushes and adsorption processes thereon — •Eva Bittrich1, Dennis Aulich2, Klaus - Jochen Eichhorn1, Karsten Hinrichs2, Petra Uhlmann1, and Manfred Stamm1 — 1Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, 01069 Dresden, Germany — 2ISAS - Institute for Analytical Sciences, Department Berlin, Albert-Einstein-Str. 9, 12489 Berlin, Germany
Thin polymer brushes, with the polymer chains grafted chemically by one end to the surface, have thoroughly proven their ability to modify physico-chemical interface properties as well as the adsorption behaviour of proteins at artificial surfaces. With the help of in-situ spectroscopic ellipsometry these thin polymer films can be investigated according to their swelling behaviour and adsorption processes at the polymer-solution interface.
We report on swelling measurements of homopolymer and mixed polymer brushes consisting of pH- and temperature sensitive polymer chains. Furthermore we investigated the adsorption of human serum albumin, a protein of the blood plasma, onto charged polymer brushes. Here we monitored the influence of changes in the environmental conditions and the composition of the polymer brush on the adsorbed amount as well as the optical properties of the protein layer.