Charge transport in the "emeraldine" form of polyaniline

H. H.S. Javadi, Fulin Zuo, K. R. Cromack, M. Angelopoulos, A. G. MacDiarmid, A. J. Epstein

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The conductivity and the dielectric constant of the "emeraldine" form of polyaniline is studied in a wide range of frequency (dc, 101-105 Hz, 6.5×109 Hz), temperature (20K-340K) and protonation level (x ≡[C1]/[N] =0.0-0.5). Two distinct behaviors are observed: Firstly, for low protonation (x ≤ 0.13), hopping of charges between polarons and bipolarons leads to dipolar relaxation (ε{lunate}RF(T)). Oscillation of polarons around pinning centers is suggested to be responsible for the high frequency dielectric constant of low protonated samples. Secondly, for intermediate to highly protonated samples (x > 0.22), the presence of "metallic islands" is apparent. Oscillation of charge carriers within the coherence length contributes to ε{lunate}μω(T=0). The intrinsic conductivity within the islands is estimated to be of the order of 250 S/cm. The T-dependence of the dielectric constant indicates an increase of the coherence length with increasing temperature. The role of localization and the nature of "textured metallic islands" are discussed.

Original languageEnglish (US)
Pages (from-to)409-416
Number of pages8
JournalSynthetic Metals
Volume29
Issue number1
DOIs
StatePublished - Mar 7 1989
Externally publishedYes

Fingerprint

Polyaniline
Charge transfer
Polarons
Permittivity
Protonation
polarons
permittivity
conductivity
oscillations
Charge carriers
charge carriers
Temperature
temperature
polyaniline

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Javadi, H. H. S., Zuo, F., Cromack, K. R., Angelopoulos, M., MacDiarmid, A. G., & Epstein, A. J. (1989). Charge transport in the "emeraldine" form of polyaniline. Synthetic Metals, 29(1), 409-416. https://doi.org/10.1016/0379-6779(89)90326-3

Charge transport in the "emeraldine" form of polyaniline. / Javadi, H. H.S.; Zuo, Fulin; Cromack, K. R.; Angelopoulos, M.; MacDiarmid, A. G.; Epstein, A. J.

In: Synthetic Metals, Vol. 29, No. 1, 07.03.1989, p. 409-416.

Research output: Contribution to journalArticle

Javadi, HHS, Zuo, F, Cromack, KR, Angelopoulos, M, MacDiarmid, AG & Epstein, AJ 1989, 'Charge transport in the "emeraldine" form of polyaniline', Synthetic Metals, vol. 29, no. 1, pp. 409-416. https://doi.org/10.1016/0379-6779(89)90326-3
Javadi HHS, Zuo F, Cromack KR, Angelopoulos M, MacDiarmid AG, Epstein AJ. Charge transport in the "emeraldine" form of polyaniline. Synthetic Metals. 1989 Mar 7;29(1):409-416. https://doi.org/10.1016/0379-6779(89)90326-3
Javadi, H. H.S. ; Zuo, Fulin ; Cromack, K. R. ; Angelopoulos, M. ; MacDiarmid, A. G. ; Epstein, A. J. / Charge transport in the "emeraldine" form of polyaniline. In: Synthetic Metals. 1989 ; Vol. 29, No. 1. pp. 409-416.
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