Selective growth of vertically aligned double- and single-walled carbon nanotubes on a substrate at 590°C

D. Kondo, S. Sato, A. Kawabata, Y. Awano

    Research output: Contribution to journalArticle

    27 Citations (Scopus)

    Abstract

    Vertically aligned double- and single-walled carbon nanotubes (DWNTs and SWNTs) were synthesized on a substrate at 590°C by hot-filament chemical vapor deposition. An optimized combination of iron and aluminum layers as the catalyst resulted in iron particles ranging from 1-5 nm floating in an aluminum matrix after annealing. Selective synthesis of DWNTs and SWNTs from such particles was achieved by adjusting the dilution ratio of acetylene that was used as the source gas. The yield of DWNTs among all CNTs was as high as 81%, while that of SWNTs was almost 100%. The diameter distribution of DWNTs was narrow, with a standard deviation of about 12%.

    Original languageEnglish
    Article number435601
    JournalNanotechnology
    Volume19
    Issue number43
    DOIs
    Publication statusPublished - 2008 Oct 22

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering
    • Electrical and Electronic Engineering

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