Insulator-to-metal transition in polyaniline: Effect of protonation in emeraldine

The emeraldine base form of the polymer can be varied from insulating ( σ ∼ 10 −10 ohm −1 cm −1) to conducting ( σ ∼ 10 0 ohm −1 cm −1) states through protonation. Based upon extensive magnetic, optical and transport data, we demonstrate that the resulting emeraldine salt is metallic with a finite d...

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Bibliographic Details
Published in:Synthetic metals 1987-08, Vol.21 (1), p.63-70
Main Authors: Epstein, A.J, Ginder, J.M, Zuo, F, Woo, H.-S, Tanner, D.B, Richter, A.F, Angelopoulos, M, Huang, W.-S, MacDiarmid, A.G
Format: Article
Language:English
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Summary:The emeraldine base form of the polymer can be varied from insulating ( σ ∼ 10 −10 ohm −1 cm −1) to conducting ( σ ∼ 10 0 ohm −1 cm −1) states through protonation. Based upon extensive magnetic, optical and transport data, we demonstrate that the resulting emeraldine salt is metallic with a finite density of states at the Fermi energy. The roles of a novel bipolaron-to-polaron lattice transition and phase segregation into conducting and non-conducting regions are discussed.
ISSN:0379-6779
1879-3290
DOI:10.1016/0379-6779(87)90067-1