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Structured oligo(aniline) nanofilms via ionic self-assembly

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Dane, Thomas G., Cresswell, Philip T., Bikondoa, Oier, Newby, Gemma E., Arnold, Thomas, Faul, C. F. J. (Charles Frederick James) and Briscoe, Wuge H.. (2012) Structured oligo(aniline) nanofilms via ionic self-assembly. Soft Matter, Vol.8 (No.10). pp. 2824-2832. ISSN 1744-683X

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Official URL: http://dx.doi.org/10.1039/C2SM06492H

Abstract

Conducting polymers have shown great potential for application in electronic devices. A major challenge in such applications is to control the supramolecular structures these materials form to optimise the functionality. In this work we probe the structure of oligo(aniline) thin films (of sub-μm thickness) drop cast on a silicon substrate using synchrotron surface diffraction. Self-assembly was induced through doping with an acid surfactant, bis(ethyl hexyl) phosphate (BEHP), resulting in the formation of well-ordered lamellae with the d-spacing ranging from 2.15 nm to 2.35 nm. The exact structural characteristics depended both on the oligomer chain length and film thickness, as well as the doping ratio. Complementary UV/Vis spectroscopy measurements confirm that such thin films retain their bulk electronic properties. Our results point to a simple and effective ionic self-assembly approach to prepare thin films with well-defined structures by tailoring parameters such as the oligomer molecular architecture, the nanofilm composition and the interfacial roughness.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Aniline, Thin films, Conducting polymers
Journal or Publication Title:	Soft Matter
Publisher:	Royal Society of Chemistry
ISSN:	1744-683X
Date:	2012
Volume:	Vol.8
Number:	No.10
Page Range:	pp. 2824-2832
Identification Number:	10.1039/c2sm06492h
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC), European Research Council (ERC), University of Bristol
Grant number:	EP/H034862/1 (EPSRC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/42822