Ahmad, Shahzada and Deepa, M. and Sen, Vikram and Kazim, Samrana and Agarwal, S. K. (2011) Conduction Behavior in Ionic Liquids Assisted Electrodeposited Polypyrrole Layers. Polymer Engineering and Science , 51 (8). pp. 1513-1518. ISSN 1548-2634

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The electropolymerization of pyrrole in ionic liquid media was carried out to produce an adherent, uniform, and durable polypyrrole (PPy) films with enhanced electrical properties. A threefold increase in the conductivity value can be attained with the selective choice of polymerizing media and ambient temperature dc conductivity value of 43, 15, and 13 S cm21 for films grown in 1-ethyl-3-methyli- midazolium bis(perfluoroethanesulfonyl)imide, 1-ethyl-3- methylimidazolium triflate and in lithium triflate in acetonitrile respectively. The corresponding localization lengths were found to be 17, 33, and 48 nm indicate that carriers are strongly localized. At low temperature, all three types of PPy films show metallic type behavior. Though transition is observed above 200 K for all the three films, the charge transport mechanism remains unaltered at higher temperatures for the films grown in ionic liquids, while the film grown in lithium triflate in ace-tonitrile assumes a three-dimensional variable range hopping conduction behavior.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Wiley.
Subjects: Engineering
Polymer Science
Depositing User: Mr. Abhishek Yadav
Date Deposited: 20 Nov 2012 06:36
Last Modified: 20 Nov 2012 06:36
URI: http://npl.csircentral.net/id/eprint/820

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