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The charge transport mechanisms in conducting polymer polypyrrole films and fibers

Journal Article


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Abstract


  • Smart materials based on inherently conducting polymers are of practical interest and extend the

    advantages of electromaterials from the nanoscale to macroscale applications. However understanding

    mechanisms of the their electrical properties are still remained challanging. Herein, we report

    the transport properties of chemically and electrochemically preapred conducting polymer

    polypyrrole films and fibers. Conduction mechanisms of the as-prepared polypyrrole (PPy) were

    investigated using their electrical properties as a function of temperature (7–300 K). The results of the

    PPy resistivity were evaluated using a linear combination of Mott’s and Efros-Shklovskii’s Variable-

    Range Hopping (Mott-VRH and ES-VRH) models. It was found that the localization length was about

    10 and 15 monomer units for the PPy-fiber and PPy-film, respectively. The contributions of Mott-and

    ES-VRH conductivities versus temperature exhibited that electrical conductivity of the PPy-film is

    two-dimensional Mott-VRH at temperatures of lower than∼100 K. It was indicated that the

    contribution of ES-VRH are larger than the contribution of Mott-VRH at temperatures of higher than

    ∼185 K. It was also found that ES-VRH law predominates at room temperature showed that average

    size of crystallites in the PPy-film was about three times larger than PPy-fiber.

UOW Authors


  •   Ghanbari, Reza (external author)
  •   Ghorbani, Shaban (external author)
  •   Arabi, Hadi (external author)
  •   Foroughi, Javad

Publication Date


  • 2018

Citation


  • Ghanbari, R., Ghorbani, S. Reza., Arabi, H. & Foroughi, J. (2018). The charge transport mechanisms in conducting polymer polypyrrole films and fibers. Materials Research Express, 5 (10), 1-6.

Scopus Eid


  • 2-s2.0-85052871343

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/4279/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3228

Number Of Pages


  • 5

Start Page


  • 1

End Page


  • 6

Volume


  • 5

Issue


  • 10

Place Of Publication


  • United Kingdom

Abstract


  • Smart materials based on inherently conducting polymers are of practical interest and extend the

    advantages of electromaterials from the nanoscale to macroscale applications. However understanding

    mechanisms of the their electrical properties are still remained challanging. Herein, we report

    the transport properties of chemically and electrochemically preapred conducting polymer

    polypyrrole films and fibers. Conduction mechanisms of the as-prepared polypyrrole (PPy) were

    investigated using their electrical properties as a function of temperature (7–300 K). The results of the

    PPy resistivity were evaluated using a linear combination of Mott’s and Efros-Shklovskii’s Variable-

    Range Hopping (Mott-VRH and ES-VRH) models. It was found that the localization length was about

    10 and 15 monomer units for the PPy-fiber and PPy-film, respectively. The contributions of Mott-and

    ES-VRH conductivities versus temperature exhibited that electrical conductivity of the PPy-film is

    two-dimensional Mott-VRH at temperatures of lower than∼100 K. It was indicated that the

    contribution of ES-VRH are larger than the contribution of Mott-VRH at temperatures of higher than

    ∼185 K. It was also found that ES-VRH law predominates at room temperature showed that average

    size of crystallites in the PPy-film was about three times larger than PPy-fiber.

UOW Authors


  •   Ghanbari, Reza (external author)
  •   Ghorbani, Shaban (external author)
  •   Arabi, Hadi (external author)
  •   Foroughi, Javad

Publication Date


  • 2018

Citation


  • Ghanbari, R., Ghorbani, S. Reza., Arabi, H. & Foroughi, J. (2018). The charge transport mechanisms in conducting polymer polypyrrole films and fibers. Materials Research Express, 5 (10), 1-6.

Scopus Eid


  • 2-s2.0-85052871343

Ro Full-text Url


  • https://ro.uow.edu.au/context/aiimpapers/article/4279/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3228

Number Of Pages


  • 5

Start Page


  • 1

End Page


  • 6

Volume


  • 5

Issue


  • 10

Place Of Publication


  • United Kingdom