Aligned growth of isolated single-walled carbon nanotubes programmed by atomic arrangement of substrate surface

Hiroki Ago, Kazuhiro Nakamura, Ken Ichi Ikeda, Naoyasu Uehara, Naoki Ishigami, Masaharu Tsuji

    Research output: Contribution to journalArticlepeer-review

    145 Citations (Scopus)

    Abstract

    Highly aligned and isolated single-walled carbon nanotubes (SWNTs) were grown on the R-face (11̄02) and A-face (112̄0) surfaces of sapphire (Al2O3) substrates by catalytic chemical vapor deposition. On the basis of the electron backscatter diffraction (EBSD) analysis, we have found that the SWNTs are aligned along the specific crystalline directions corresponding to the anisotropic pseudo-one-dimensional array of Al atoms on these surfaces. This suggests that the Al array guides the SWNT growth due to the strong interaction between the Al atoms and nanotubes. On the other hand, a random orientation has been observed for the SWNTs grown on the C-face (0 0 0 1) substrate, reflecting the isotropic arrangement of Al atoms. These findings indicate that the strong interaction between the SWNTs and substrate surface is applicable for patterning or integrating SWNTs in nanoelectronics applications.

    Original languageEnglish
    Pages (from-to)433-438
    Number of pages6
    JournalChemical Physics Letters
    Volume408
    Issue number4-6
    DOIs
    Publication statusPublished - Jun 17 2005

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

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