Conduction mechanism of the bamboo-shaped multiwalled carbon nanotubes

J. W. Jang, S. H. Kim, C. E. Lee, T. J. Lee, C. J. Lee, H. S. Kim, E. H. Kim, S. J. Noh

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)

Abstract

Temperature-dependent resistivity measurements were carried out on bamboo-shaped multiwalled carbon nanotubes (BS-MWNTs) vertically grown on cobalt catalyst deposited Al2O3/Ti substrates and iron catalysts deposited SiO2/Ti substrates at 750 - 950 °C by thermal chemical vapor deposition. The resistivity decreased with increasing growth temperature, and showed lower values in the case of SiO2/Ti substrates than in the case of the Al2O3/Ti substrates. A heterogeneous model, compromising quasi 1-D metal terms and the fluctuation-induced tunneling through thin barriers between metallic regions was introduced to explain the conduction mechanism. As a result, it was proposed that the important factor for the conduction mechanism of BS-MWNTs is the inter-sheet conduction by discontinuous graphitic sheets at the compartments.

Original languageEnglish
Pages (from-to)S985-S988
JournalJournal of the Korean Physical Society
Volume42
Issue numberSUPPL.2
Publication statusPublished - 2003 Feb
EventProceedings of the Joint International Plasma Symposium of 6th APCPST, 15th SPSM, OS 2002 and 11th KAPRA - Jeju Island, Korea, Republic of
Duration: 2002 Jul 12002 Jul 4

Keywords

  • Bamboo-shape
  • Carbon nanotubes
  • Conduction mechanism

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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