Formation mechanism of carbon nanotubes in the gas-phase synthesis from colloidal solutions of nanoparticles

Hiroki Ago, Satoshi Ohshima, Kazuhito Tsukuagoshi, Masaharu Tsuji, Motoo Yumura

    Research output: Contribution to journalConference articlepeer-review

    17 Citations (Scopus)

    Abstract

    Single- and multi-wall carbon nanotubes have been synthesized by the gas-phase catalytic reaction of colloidal solutions of metal nanoparticles using a vertical flow reactor. The reverse micelle solution of the Co-Mo nanoparticles with the mean diameter of 11 nm dissolved in toluene was injected directly into the reactor maintained at 1200 °C. The nanoparticles and the solvent act as the catalyst and carbon source, respectively. When the concentration of the thiophene additive is low (1 wt.%), the formation of SWNT bundles preferentially occurred. The SWNT bundles were present together with the relatively small metal nanoparticles with the diameter of 0.5-5.5 nm. It is likely that the original nanoparticles with the diameter of 11 nm break into smaller ones, 1-2 nm diameters, which is suitable for the SWNT growth. The synactic effect of Co and Mo was also observed.

    Original languageEnglish
    Pages (from-to)128-132
    Number of pages5
    JournalCurrent Applied Physics
    Volume5
    Issue number2
    DOIs
    Publication statusPublished - Feb 2005
    EventIndo-Japan Workshop on Advanced Molecular Electronics - Kitakyushu, Japan
    Duration: Dec 11 2003Dec 12 2003

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Physics and Astronomy(all)

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