Ft-icr study of precursor clusters of single-walled carbon nanotubes (swnts)

Masamichi Kohno, Shuhei Inoue

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Metal-carbon binary clusters generated by the laser vaporization of Ni/Co and Ni/Y doped graphite samples used for the macroscopic laser-oven production of SWNTs were studied. Positive and negative clusters generated by the laser-vaporization supersonic-expansion cluster beam source were directly injected into the FT-ICR (Fourier Transform Ion Cyclotron Resonance) mass spectrometer. Depending on the metal species, the generation efficiency of metal-carbon binary clusters was drastically different. The chemical reaction of these clusters with NO gas was used as the probe of the geometrical structure of clusters. The reactivity to NO of these binary clusters was completely different. In case of YCn (n = even, n ≥ 36), chemical reaction of YCn with NO was not observed while pure carbon clusters were reacted. On the other hand, for MCn (M = Ni or Co), the reactivity was much higher than pure carbon clusters. It was speculated that a few Ni or Co atoms attached outside of imperfect carbon cage for Ni/Co doped case and that Y atom was included in the carbon cage for Ni/Y doped case.

Original languageEnglish
Pages (from-to)33-39
Number of pages7
JournalMicroscale Thermophysical Engineering
Volume7
Issue number1
DOIs
Publication statusPublished - Jan 1 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy (miscellaneous)

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