Improvement in carrier mobility of poly(3,4-ethylenedioxythiophene) nanowires synthesized in porous alumina templates

Yasuhiro Shirai, Seiichi Takami, Soesan Lasmono, Hideo Iwai, Toyohiro Chikyow, Yutaka Wakayama

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Polymeric nanowires of poly(3,4-ethylenedioxythiophene) (PEDOT) are electrochemically synthesized using porous anodic alumina oxide (AAO) membranes as templates. Four-point resistivity measurements on more than 100 PEDOT nanowires with different diameters (50-250 nm) reveal a statistically significant size-dependent phenomenon in which the nanowires with a smaller diameter exhibit higher conductivity. Structural characterization with Raman spectroscopy and doping level estimation with energy-dispersive X-ray spectrometry and X-ray photoelectron spectroscopy indicate that the observed conductivity enhancement can be attributed to improved carrier mobility in PEDOT nanowires having an elongated conjugation structure because of the effect of the AAO template. From the estimated doping levels (∼5%) and conductivity data (∼100 S/cm), it is found that the carrier mobility reach 2.0 cm 2/V s for the nanowire with the smallest diameter, as compared with 4.0 ×- 10-4 cm2/V s for a bulk PEDOT film.

Original languageEnglish
Pages (from-to)1762-1768
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume49
Issue number24
DOIs
Publication statusPublished - 2011 Dec 15

Keywords

  • anodic alumina oxide
  • carrier mobility
  • conductivity
  • conjugated polymers
  • high performance polymers
  • nanowire
  • poly(3,4-ethylenedioxythiophene)
  • templates

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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