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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

CONTROLLED CVD SYNTHESIS OF SINGLE-WALLED CARBON NANOTUBES FROM ALCOHOL

Get access (open in a dialog) DOI: 10.1615/IHTC13.p8.250
12 pages

Аннотация

By using alcohol as carbon source, high-purity single-walled carbon nanotubes (SWNTs) are generated at relatively low CVD temperatures. Based on this finding, we have proposed the alcohol catalytic CVD (ACCVD) technique. This paper describes the controlled growth of SWNTs in the context of chirality (nanotube structure) and morphology with the advanced ACCVD technique. After the description of the experimental techniques and apparatus, each specific technique is described such as bulk synthesis of SWNTs on catalysts supported with zeolite, random SWNT films on flat substrates, alignment of SWNTs dispersed in gelatin film, growth of vertically aligned SWNT films on substrates, and localized-growth of SWNTs by laser heating on substrates. On the other hand, various experimental techniques have been employed to understand the growth mechanism of SWNTs: direct TEM observation of catalysts particles; in-situ Raman and AFM measurements during CVD; in-situ monitoring of laser absorption; combinatory spattering method to prepare catalysts. On the other hand, the chirality distribution of SWNTs measured by the near infrared fluorescence spectroscopy is quite unique for low-temperature CVD condition. The near armchair nanotubes are predominantly generated probably because of the stability of nanotube cap structure.