Competition and cooperation between lattice-oriented growth and step-templated growth of aligned carbon nanotubes on sapphire

Hiroki Ago, Kenta Imamoto, Naoki Ishigami, Ryota Ohdo, Ken Ichi Ikeda, Masaharu Tsuji

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    56 Citations (Scopus)

    Abstract

    The authors study the growth mechanism of single-walled carbon nanotubes (SWNTs) horizontally aligned on A -plane single crystal sapphire (11 2- 0) by making the controlled step/terrace structure. SWNT growth direction was sensitive to the surface geometry of the sapphire, and there was competition between two growth modes, lattice-oriented growth and step-templated growth. On the substrate with single-atomic steps, SWNTs aligned parallel to the [1 1- 00] direction as dominated by the lattice-oriented growth mode, while SWNTs aligned along the step edges when the double-atomic or higher steps were formed. Our findings have potential for the fabrication of designed architecture of SWNTs by combining these two growth modes.

    Original languageEnglish
    Article number123112
    JournalApplied Physics Letters
    Volume90
    Issue number12
    DOIs
    Publication statusPublished - 2007

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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