Conduction Mechanism of the Bamboo-Shaped Multiwalled Carbon Nanotubes
Conduction Mechanism of the Bamboo-Shaped Multiwalled Carbon Nanotubes
- 주제(키워드) Conduction mechanism , Bamboo-shape , Carbon nanotubes
- 발행기관 한국물리학회
- 발행년도 2003
- 총서유형 Journal
- UCI G704-000411.2003.42.III.034
- KCI ID ART000991148
- 본문언어 영어
초록/요약
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 uctuation-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.
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