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Abstract
An electrolyte-stable polymer composite sensor film based on 2.4% boronic acid substituted polyacrylamide (poly[acrylamide-co-3-(methacrylamido)- phenylboronic acid] or P(A-MPBA)) and polydiallyl-dimethyl-ammonium chloride (or PDDACl) is obtained in a coil-by-coil deposition procedure. Based on AFM evidence, the resulting coil aggregate deposits show ca. 5-10 nm diameter and the average film thickness increases with ca. 1 nm per deposition cycle consistent approximately with the solution coil diameter. In electrochemical experiments alizarin red S is employed as a boronic acid indicating redox probe with a Langmuirian binding constant of ca. K = 4 × 10 M and two distinct redox responses tentatively assigned here to two isomeric forms of the complex in oxidized and reduced state. Inter- and intra-coil electron transfer and electron hopping occurs during alizarin red S reduction and back-oxidation. Both smooth and mesoporous ITO substrates are employed.
Original language | English |
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Pages (from-to) | 18999-19006 |
Number of pages | 8 |
Journal | Journal of Materials Chemistry |
Volume | 22 |
Issue number | 36 |
DOIs | |
Publication status | Published - 28 Sept 2012 |
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Dive into the research topics of 'Coil-by-coil assembly of poly[acrylamide-co-3-(methacryl-amido)- phenylboronic acid] with polydiallyldimethyl-ammonium to give alizarin red S responsive films'. Together they form a unique fingerprint.Projects
- 1 Finished
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DESIGNER 3D MAGNETIC MESOSTRUCTURES
Peter, L. (PI) & Bending, S. (CoI)
Engineering and Physical Sciences Research Council
1/10/07 → 31/05/11
Project: Research council