Dresden 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 12: POSTER Colloids, Nanoparticles and Self-Organizing Systems

CPP 12.17: Poster

Dienstag, 28. März 2006, 17:00–19:00, P3

Controlled Surface Design of Nanoparticles via Switchable Polymer Brushes — •Nikolay Houbenov¹, Sergiy Minko², Alexander Sidorenko³, Petra Uhlmann¹, and Manfred Stamm¹ — ¹Leibniz-Institut fuer Polymerforschung Dresden e.V., Germany — ²Clarkson University Potsdam, New York — ³Bell Labs, Lucent Technologies, Murray Hill, USA

Switchable multicomponent grafted polymer films (polymer brushes) can be successfully used to control the spatial position of nanoparticles of various size and nature. We applied different methods for creating surface patterns, as adsorption via dynamic wetting (by settling the substrates at different angles) of 10-100 nm charged latex particles, or plasma deposition of golden clusters (2-5 nm total film thickness), on stimuli responsive polymer brushes. It was shown, that via controlled surface arrangement, one is able to create long-ranged arrays of nanoparticles, with a characteristic lateral distance, which is a function of the physical-chemical properties of the particles and the polymer brushes. Changing the chain conformation of the grafted PAA-P2VP, PI-P2VP or PS-P2VP brush-like layers by external stimuli, we observed a disarrangement at the particles stripes location from a range of few nanometers to sub-microscopic scale. Such an altering of the quality of the surrounding medium creates a memory effect on the material surface by continuous revealing or concealing (replacing) the particles (clusters).