Effect of conducting polypyrrole on the transport properties of carbon nanotube yarn

Journal Article


Abstract


  • Experiments were conducted to measure the electrical conductivity in three types of pristine and carbon nanotube-polypyrrole (CNT-PPy) composite yarns and its dependence on over a wide temperature range. The experimental results fit well with the analytical models developed. The effective energy separation between localized states of the pristine CNT yarn is larger than that for both the electrochemically and chemically prepared CNT-PPy yarns. It was found that all samples are in the critical regime in the insulator–metal transition, or close to the metallic regime at low temperature. The electrical conductivity results are in good agreement with a Three Dimensional Variable Range Hopping model at low temperatures, which provides a strong indication that electron hopping is the main means of current transfer in CNT yarns at T < 100 K. We found that the two shell model accurately describes the electronic properties of CNT and CNT-PPy composite yarns in the temperature range of 5–350 K.

Authors


  •   Foroughi, Javad (external author)
  •   Kimiaghalam, Bahram (external author)
  •   Ghorbani, Shaban (external author)
  •   Safaei, Farzad
  •   Abolhasan, Mehran (external author)

Publication Date


  • 2012

Citation


  • Foroughi, J., Kimiaghalam, B., Ghorbani, S., Safaei, F. & Abolhasan, M. (2012). Effect of conducting polypyrrole on the transport properties of carbon nanotube yarn. Thin Solid Films, 520 (24), 7049-7053.

Scopus Eid


  • 2-s2.0-84866042176

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/317

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 7049

End Page


  • 7053

Volume


  • 520

Issue


  • 24

Abstract


  • Experiments were conducted to measure the electrical conductivity in three types of pristine and carbon nanotube-polypyrrole (CNT-PPy) composite yarns and its dependence on over a wide temperature range. The experimental results fit well with the analytical models developed. The effective energy separation between localized states of the pristine CNT yarn is larger than that for both the electrochemically and chemically prepared CNT-PPy yarns. It was found that all samples are in the critical regime in the insulator–metal transition, or close to the metallic regime at low temperature. The electrical conductivity results are in good agreement with a Three Dimensional Variable Range Hopping model at low temperatures, which provides a strong indication that electron hopping is the main means of current transfer in CNT yarns at T < 100 K. We found that the two shell model accurately describes the electronic properties of CNT and CNT-PPy composite yarns in the temperature range of 5–350 K.

Authors


  •   Foroughi, Javad (external author)
  •   Kimiaghalam, Bahram (external author)
  •   Ghorbani, Shaban (external author)
  •   Safaei, Farzad
  •   Abolhasan, Mehran (external author)

Publication Date


  • 2012

Citation


  • Foroughi, J., Kimiaghalam, B., Ghorbani, S., Safaei, F. & Abolhasan, M. (2012). Effect of conducting polypyrrole on the transport properties of carbon nanotube yarn. Thin Solid Films, 520 (24), 7049-7053.

Scopus Eid


  • 2-s2.0-84866042176

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/317

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 7049

End Page


  • 7053

Volume


  • 520

Issue


  • 24