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

    Research output: Contribution to journalArticlepeer-review

    32 Citations (Scopus)

    Abstract

    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
    Volume157
    Issue number22-23
    DOIs
    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).

    Keywords

    • 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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