Growth mechanism and internal structure of vertically aligned single-walled carbon nanotubes

Erik Einarsson, Masayuki Kadowaki, Kazuaki Ogura, Jun Okawa, Rong Xiang, Zhengyi Zhang, Takahisa Yamamoto, Yuichi Ikuhara, Shigeo Maruyama

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)

    Abstract

    An in situ optical absorbance technique was used to monitor the growth of vertically aligned single-walled carbon nanotubes (VA-SWNTs) at various temperatures and pressures. The effects of the growth temperature and ethanol pressure on the initial growth rate and catalyst lifetime were investigated. It was found that the ideal pressure for VA-SWNT synthesis changes with the growth temperature, shifting toward higher pressure as the growth temperature increases. It was also found that the growth reaction is first-order below this ideal pressure. Additionally, the internal structure of the VA-SWNT film was observed at different depths into the film by transmission electron microscopy. The absence of large bundles was confirmed, and little change in the structure was observed to a depth of approximately 1 μm.

    Original languageEnglish
    Pages (from-to)6093-6098
    Number of pages6
    JournalJournal of Nanoscience and Nanotechnology
    Volume8
    Issue number11
    DOIs
    Publication statusPublished - 2008 Nov 1

    Keywords

    • Alcohol CVD
    • Carbon nanotube
    • Growth mechanism
    • SWNT
    • TEM

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Biomedical Engineering
    • Materials Science(all)
    • Condensed Matter Physics

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