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Durham University

Research & business

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Publication details for Professor Andy Monkman

MONKMAN, AP, ADAMS, PN, LAUGHLIN, PJ & HOLLAND, ER (1995). POLYANILINE, AIR-STABLE ORGANIC METAL - FACT, NO LONGER FICTION. Synthetic Metals 69(1-3): 183-186.
  • Publication type: Journal Article
  • ISSN/ISBN: 0379-6779
  • Keywords: POLYACETYLENE; CONDUCTIVITY; FILMS; POLYMERS; STATE

Author(s) from Durham

Abstract

Via improved chemistry we have increased the maximum attainable
conductivity in oriented polyaniline. D.C. conductivity's approaching
10(4) Scm(-1) have been measured. Temperature dependent transport
measurements reveal that our new polyaniline behaves in a similar
fashion to high conductivity polyacetylene and can be modelled in the
same way. However we do observe strongly temperature dependent
electrical anisotropy below a characteristic temperature of ca. 150 K
Thermopower measurements indicate that the system is metallic in the
parallel direction but also, we find that the thermopower is
anisotropic. Thermopower in the perpendicular direction changes sign at
around 200 K. This we take to indicate that the interchain conduction
process involves phonons, and hence a different transport mechanism
must control it as compared to the metallic intrachain transport.