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Proceedings Paper

Electrochemically switchable surfaces using polymer brush-grafted conducting polymer films
Author(s): Yiwen Pei; Jadranka Travas-Sejdic; David E. Williams
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Paper Abstract

We demonstrate an electrochemical switching of conformation of surface-bound polymer brushes, by grafting environmentally sensitive polymer brushes from an electrochemically-active conducting polymer (ECP). Using atom transfer radical polymerization (ATRP), we grafted zwitterionic polymer brushes, poly(3-(methacryloylamino)propyl)- dimethyl(3-sulfopropyl)ammonium hydroxide) (MPDSAH), from a surface initiated poly(pyrrole-co-pyrrolyl butyric acid) film. The changes in ionic solution composition in electrical double layer at the surface resulting from oxidation and reduction of the ECP trigger a switch in conformation of surface-bound poly(MPDSAH), demonstrated here by electrochemical impedance spectroscopy (EIS). The switch is also dependent upon temperature. We speculate that the synergistic combination of properties embodied in these "smart" materials may find application in electrochemical control of surface wetting and of interaction with biomolecules and living cells.

Paper Details

Date Published: 24 December 2011
PDF: 8 pages
Proc. SPIE 8204, Smart Nano-Micro Materials and Devices, 82042B (24 December 2011); doi: 10.1117/12.903201
Show Author Affiliations
Yiwen Pei, The Univ. of Auckland (New Zealand)
Jadranka Travas-Sejdic, The Univ. of Auckland (New Zealand)
MacDiarmid Institute for Advanced Materials and Nanotechnology (New Zealand)
David E. Williams, The Univ. of Auckland (New Zealand)
MacDiarmid Institute for Advanced Materials and Nanotechnology (New Zealand)


Published in SPIE Proceedings Vol. 8204:
Smart Nano-Micro Materials and Devices
Saulius Juodkazis; Min Gu, Editor(s)

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