Dresden 2006 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 27: POSTER Polymer Physics and Materials
CPP 27.49: Poster
Thursday, March 30, 2006, 17:00–19:00, P2
ATRP-Synthesis of Polymer Brushes in aqueous Solution for Silicon Surface Modification — •Sebastian Nett1, Gunnar Kircher1, Markus Wolkenhauer1, and Jochen S. Gutmann1,2 — 1Max Planck Institute for Polymer Research, Ackermannweg 11, D-55128 Mainz — 2Institute for Physical Chemistry, Johannes Gutenberg University, Welderweg 11, D-55099 Mainz
The aim of this project is the chemical modification of
Micromechanical Sensors (MMS) for the use as temperature and
chemical probes. The silicon-surface properties are changed by
growing polymer brushes on top of the MMS.
Our approach make use of a Nanoplotter (GESIM) to "print"
microstructures on micro cantilever sensors. The Nanoplotter is
optimized for water as system liquid. Therefore the synthesis of the
covalently bound polymer brushes has to be in aqueous solution. We
performed ATRP (Atom Transfer Radical Polymerization) -Synthesis of
PNIPAM (Poly(N-Isopropylacrylamide))in a mixture of H2O and DMF
both in bulk solution and small droplets. Ellipsometry measurements
provided the characterization of the film.
The brush thickness varies with molecular weight from 5 to 40 nm.
The synthesized PNIPAM shows a LCST (lower critical solution
temperature) behavior at a critical temperature of 32∘C.