Conductivity and microwave dielectric response of polyaniline and poly(o-toluidine) fibers

Y. Z. Wang, J. Joo, C. H. Hsu, A. J. Epstein

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We compare the results of temperature-dependent de conductivity σdc(T) and microwave dielectric constant ε{lunate}mw(T) for CSA doped polyaniline (PAN-CSA) and poly(o-toluidine) (POT-CSA) fibers prepared in m-cresol, HCl doped 4-fold stretched polyaniline EB fiber (PAN-HCl(4X)), and HCl doped poly(o-toluidine) (POT-HCl) fibers (unstretched and 3-fold stretched). Although POT-HCl fibers show similar σdc(T) as earlier studied POT-HCl powder, POT-CSA fiber shows significantly higher σdc(T) with much weaker temperature dependence and much larger ε{lunate}mw(T), indicating that it is much closer to the localization-delocalization boundary. PAN-HCl(4X) fiber and PAN-CSA fiber have almost identical dc conductivity at room temperature, however PAN-HCl(4X) fiber shows stronger temperature of σdc and a very large positive ε{lunate}mw, as opposed to have huge negative ε{lunate}mw observed in the PAN-CSA fiber.

Original languageEnglish
Pages (from-to)267-268
Number of pages2
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 1995 Mar 1
Externally publishedYes

Bibliographical note

Funding Information:
This work is supported in part by the Office of Naval Research and The Ohio State University Center for Materials Research. We appreciate discussions with J. P. Pouget.

ASJC Scopus subject areas

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


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