Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Organic, polymeric, biomolecular films – also with absorbates II
O 66.1: Vortrag
Freitag, 27. März 2009, 11:15–11:30, SCH A316
In-situ infrared spectroscopic ellipsometry of the solid-liquid interface of mixed polymer brushes — •Dennis Aulich1, Eva Bittrich2, Petra Uhlmann2, Igor Luzinov3, Olha Hoy3, Klaus-Jochen Eichhorn2, Manfred Stamm2, Norbert Esser1, and Karsten Hinrichs1 — 1ISAS - Institute for Analytical Sciences, Albert-Einstein-Str. 9, 12489 Berlin — 2Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden — 3Clemson University, 29634-0971, USA
For the control of protein adsorption, wettability and adhesion, functional surfaces based on ultrathin organic films attract more and more interests. Very promising representatives of functional surfaces are mixed polymer brushes. These polymer layers offer the possibility to switch the surface properties e.g. from a protein-repelling to a protein-adsorbing behaviour as a response to external stimuli like solvents, pH or temperature. In order to understand the complex mechanisms of surface functionalization and modification, the single mechanisms like switching of polymer brushes and the adsorption of protein layers have to be well understood. In our recent work we studied the selected mechanisms in-situ with infrared spectroscopic ellipsometry (IRSE). The reversible pH dependent switching of mixed polymer brush systems and mono polymer brushes as well were investigated in-situ in aqueous solutions [2,3]. References: [1] Hoy, O.; Zdyrko, B.; Aulich, D. et al., PMSE Preprints, 99, 114-115, 2008; [2] Mikhaylova, Y.; Ionov, L. et al., Anal. Chem. 79(20): 7676-7682, 2007; [3] Roodenko, K.; Mikhaylova, et al., Appl. Phys. Lett. 92, 103102, 2008