Growth of horizontally-aligned single-walled carbon nanotubes on sapphire surface by needle-scratching method

Hiroki Ago, Yasumichi Kayo, Masaharu Tsuji

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    We report the growth of single-walled carbon nanotubes (SWNTs) over metal nanoparticles which are formed by scratching sapphire surface with metal wires. The chemical vapor deposition over sapphire substrate scratched with Fe and Co metal wires gives horizontally aligned SWNTs, while no nanotube growth is observed for Au, Mo, and Ni wires. This result suggests that the nanoparticles scattered from Fe and Co wires act as the catalyst for SWNT growth, being different from the previously proposed substrate-catalyzed reaction mechanism. Further, we study the effects of the flow rates of CH 4-H 2 gases during the SWNT growth on the nanotube density and diameter.

    Original languageEnglish
    Article number04DN02
    JournalJapanese Journal of Applied Physics
    Volume51
    Issue number4 PART 2
    DOIs
    Publication statusPublished - Apr 1 2012

    Fingerprint

    Single-walled carbon nanotubes (SWCN)
    Sapphire
    needles
    Needles
    sapphire
    carbon nanotubes
    wire
    Wire
    Nanotubes
    nanotubes
    metals
    nanoparticles
    Metal nanoparticles
    Substrates
    Metals
    Chemical vapor deposition
    flow velocity
    Flow rate
    vapor deposition
    methylidyne

    All Science Journal Classification (ASJC) codes

    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this

    Growth of horizontally-aligned single-walled carbon nanotubes on sapphire surface by needle-scratching method. / Ago, Hiroki; Kayo, Yasumichi; Tsuji, Masaharu.

    In: Japanese Journal of Applied Physics, Vol. 51, No. 4 PART 2, 04DN02, 01.04.2012.

    Research output: Contribution to journalArticle

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