Visualization of horizontally-aligned single-walled carbon nanotube growth with13C/12C isotopes

Hiroki Ago, Naoki Ishigami, Naoki Yoshihara, Kenta Imamoto, Seiji Akita, Ken Ichi Ikeda, Masaharu Tsuji, Tatsuya Ikuta, Koji Takahashi

研究成果: Contribution to journalArticle

27 被引用数 (Scopus)

抄録

Horizontally aligned growth of single-walled carbon nanotubes (SWNTs) on single-crystal surfaces has attracted great interest in terms of nanoelectronic applications, but their growth mechanism is not fully understood. We report on the 13C/12C isotope-labeled growth of SWNTs on a sapphire surface to visualize their growth process. Switching carbon feedstock from 13CH4 to 12CH4 during SWNT growth induces a gradient distribution of the carbon isotopes along the tube axis. From the Raman mapping analysis, we succeeded to observe the gradual change in the isotope distribution of individual SWNTs. The results indicate the base-growth mode for the horizontally aligned SWNTs, which suggests that nanotube-sapphire interaction is essential to alignment. This method offers a unique technique to analyze the nanotube growth mechanism and kinetics.

元の言語英語
ページ(範囲)1735-1738
ページ数4
ジャーナルJournal of Physical Chemistry C
112
発行部数6
DOI
出版物ステータス出版済み - 2 14 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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