Dresden 2009 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Thin Films

CPP 6.3: Vortrag

Montag, 23. März 2009, 14:30–14:45, ZEU 160

Electron irradiation on thin polymer films and its use for biosurface engineering — •Sina Burkert, Uhlmann Petra, and Manfred Stamm — Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Str. 6, 01069 Dresden

Surface-active materials have been attracting considerable attention in recent years. Especially the tuning of thin polymer films at surfaces has achieved high interest for applications in micro- and nanotechnology, as well as in biotechnology. In this work we will present the effect of electron irradiation on polymer brushes, which represent thin functional films. Those films have shown to be a versatile tool to create, in dependence on the grafting density and chemical composition, e.g. as mixed brushes, stable responsive functional coatings. It is possible to switch the surface properties of a mixed film between the properties of two incompatible polymers by external stimuli, such as temperature. During electron irradiation specific modifications of the respective polymers occur, which have been investigated by various characterization techniques and will be discussed in detail. The knowledge about the interaction of specific polymer brushes with electrons was then used to control the physico-chemical brush properties and to generate a lateral wettability gradient within the film. Those modified surfaces influence protein adsorption in a special manner, which will be also discussed in this contribution. In terms of application in biotechnology first results of cell growth experiments will be presented.