Doped and de-doped polypyrrole nanowires by using a BMIMPF6 ionic liquid

Hyun Seung Kim, Dong Hyuk Park, Yong Baek Lee, Dae Chul Kim, Hyun Jun Kim, Jeongyong Kim, Jinsoo Joo

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29 Citations (Scopus)


We electrochemically synthesized π-conjugated polypyrrole (PPy) nanowires by using an environmentally stable and recyclable ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), as a dopant, based on an anodic alumina oxide (Al2O3) nanoporous template. The de-doped states of the PPy nanowires were obtained from doped PPy nanowires through cyclic voltammetry (CV) using a solution of the catalyst in the BMIMPF6 ionic liquid. We confirmed the de-doped states of PPy nanowires based on a decrease of the bipolaron peak of the ultraviolet and visible (UV-vis) absorbance spectra. The formation of PPy nanowires was visualized by using scanning electron microscopy and transmission electron microscopy. We studied the optical and structural properties of the doped and de-doped PPy nanowires by UV-vis absorbance and Fourier transform-infrared spectra. Our work included obtaining a laser confocal microscope Raman spectra for a single strand of the PPy nanowires.

Original languageEnglish
Pages (from-to)910-913
Number of pages4
JournalSynthetic Metals
Issue number22-23
Publication statusPublished - 2007 Nov

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (no. R0A-2007-000-20053-0) (2007).


  • Electrochemical polymerization
  • Ionic liquid
  • Nanowire
  • Polypyrrole

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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