Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 5: Polyelectrolytes
CPP 5.4: Vortrag
Montag, 27. März 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 Klitzing3 — 1TU 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.