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Dresden 2006 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 5: Polyelectrolytes

CPP 5.4: Talk

Monday, March 27, 2006, 15:15–15:30, ZEU 160

Thermosensitive surfaces by self-assembly of PNIPAM microgels on polyelectrolyte layers — •Thomas Hellweg1, Stephan Schmidt2, and Regine von Klitzing31TU Berlin, Stranski-Lab. (ER 1), Strasse des 17.Juni 112, 10623 Berlin — 2MPI-KGF, 14424 Potsdam — 3Institut für Physikalische Chemie, Christian-Albrechts-Universität Kiel, Ludewig-Meyn-Str. 8, 24118 Kiel

The present contribution describes the behaviour and ordering of thermosensitive PNIPAM and PNIPAM-co-P(AAC) microgels when deposited on layers of the polyelectrolyte PEI. The obtained surface structures change as a function of deposition method (spin-coating or dip-coating) and also as a function of the interaction between microgel and PEI. The electrostatic part of the interaction can be controled by pH or ionic strength.
Ordered monolayers of microgel particles were obtained and characterized by in-situ ellipsometry measurements. The films are still responsive and change thickness with increasing temperature making them possible candidates for sensoric surfaces.

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