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Control of hole opening in single-wall carbon nanotubes and single-wall carbon nanohorns using oxygen.

Authors
  • Fan, Jing
  • Yudasaka, Masako
  • Miyawaki, Jin
  • Ajima, Kumiko
  • Murata, Katsuyuki
  • Iijima, Sumio
Type
Published Article
Journal
The Journal of Physical Chemistry B
Publisher
American Chemical Society
Publication Date
Feb 02, 2006
Volume
110
Issue
4
Pages
1587–1591
Identifiers
PMID: 16471720
Source
Medline
License
Unknown

Abstract

Due to the simplicity of the process, holes in the graphene walls of single-wall carbon nanotubes (SWNTs) and single-wall carbon nanohorns (SWNHs) have often been opened using O2 gas at high temperatures, even though this contaminates the nanotubes with carbonaceous dust (C-dust). To open holes with less C-dust contamination, we found that a slow temperature increase of 1 degrees C/min or less, in air, was effective. We also found that SWNHs having little C-dust could store a large quantity of materials inside the tubes. We infer that the local temperature increase due to the exothermic reaction of combustion may have been suppressed in the slow combustion process, which was effective in reducing the C-dust.

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