Structural and electrical properties of ozone irradiated carbon nanotube yarns and sheets

Toru Iijima, Yasuhiro Inagaki, Hisayoshi Oshima, Takuya Iwata, Ryota Sato, Golap Kalita, Toru Kuzumaki, Yasuhiko Hayashi, Masaki Tanemura

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Poor electrical conductivity of carbon nanotube (CNT) yarn and sheets has been one of the main hurdles in their practical application. Here, we demonstrate that the ozone irradiation can be an effective approach to reduce the resistivity of spun CNTs bundle with oxidization and induced defects. The CNT yarn and sheet are fabricated from a spinnable vertically aligned CNT forest synthesized by a thermal chemical vapor deposition. The electrical resistance of a CNT yarn and sheet reduces with a certain period of ozone irradiation; however for a long duration of ozone irradiation resistance increases with structural deformation of the CNTs. A comparative study on the effect of shapes between the CNT yarn and sheet with morphological change in the CNTs due to the ozone irradiation is performed. It was observed that the desorption energy of ozone molecules was slightly large for the CNT yarn due to the difference of adsorption sites. The fraction of defects induced by the ozone irradiated on the CNT yarn was estimated from the ultimate resistance change with temperature and Raman spectroscopy.

Original languageEnglish
Pages (from-to)357-362
Number of pages6
JournalMaterials Express
Volume2
Issue number4
DOIs
Publication statusPublished - Dec 2012

Fingerprint

Carbon Nanotubes
Ozone
Yarn
Structural properties
Carbon nanotubes
Electric properties
Irradiation
Defects
Acoustic impedance
Raman spectroscopy
Chemical vapor deposition
Desorption
Adsorption
Molecules

Keywords

  • Carbon Nanotube
  • Chemical Vapor Deposition
  • Ozone Irradiation
  • Sheet
  • Spinning
  • Yarn

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Iijima, T., Inagaki, Y., Oshima, H., Iwata, T., Sato, R., Kalita, G., ... Tanemura, M. (2012). Structural and electrical properties of ozone irradiated carbon nanotube yarns and sheets. Materials Express, 2(4), 357-362. https://doi.org/10.1166/mex.2012.1092

Structural and electrical properties of ozone irradiated carbon nanotube yarns and sheets. / Iijima, Toru; Inagaki, Yasuhiro; Oshima, Hisayoshi; Iwata, Takuya; Sato, Ryota; Kalita, Golap; Kuzumaki, Toru; Hayashi, Yasuhiko; Tanemura, Masaki.

In: Materials Express, Vol. 2, No. 4, 12.2012, p. 357-362.

Research output: Contribution to journalArticle

Iijima, T, Inagaki, Y, Oshima, H, Iwata, T, Sato, R, Kalita, G, Kuzumaki, T, Hayashi, Y & Tanemura, M 2012, 'Structural and electrical properties of ozone irradiated carbon nanotube yarns and sheets', Materials Express, vol. 2, no. 4, pp. 357-362. https://doi.org/10.1166/mex.2012.1092
Iijima, Toru ; Inagaki, Yasuhiro ; Oshima, Hisayoshi ; Iwata, Takuya ; Sato, Ryota ; Kalita, Golap ; Kuzumaki, Toru ; Hayashi, Yasuhiko ; Tanemura, Masaki. / Structural and electrical properties of ozone irradiated carbon nanotube yarns and sheets. In: Materials Express. 2012 ; Vol. 2, No. 4. pp. 357-362.
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