Micropatterning of Functional Conductive Polymers with Multiple Surface Chemistries in Register

Johan Ulrik Lind, Canet Acikgöz, Anders Egede Daugaard, Thomas Lars Andresen, Søren Hvilsted, Marcus Textor, Niels Bent Larsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A versatile procedure is presented for fast and efficient micropatterning of multiple types of covalently bound surface chemistry in perfect register on and between conductive polymer microcircuits. The micropatterning principle is applied to several types of native and functionalized PEDOT (poly(3,4-ethylenedioxythiophene)) thin films. The method is based on contacting PEDOT-type thin films with a micropatterned agarose stamp containing an oxidant (aqueous hypochlorite) and applying a nonionic detergent. Where contacted, PEDOT not only loses its conductance but is entirely removed, thereby locally revealing the underlying substrate. Surface analysis showed that the substrate surface chemistry was fully exposed and not affected by the treatment. Click chemistry could thus be applied to selectively modify re-exposed alkyne and azide functional groups of functionalized polystyrene substrates. The versatility of the method is illustrated by micropatterning cell-binding RGD-functionalized PEDOT on low cell-binding PMOXA (poly(2-methyl-2-oxazoline)) to produce cell-capturing microelectrodes on a cell nonadhesive background in a few simple steps. The method should be applicable to a wide range of native and chemically functionalized conjugated polymer systems.
Original languageEnglish
JournalLangmuir
Volume28
Issue number15
Pages (from-to)6502-6511
ISSN0743-7463
DOIs
Publication statusPublished - 2012

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