Evaluation of optimum sheath electric field and minimum catalyst interval for selective production of metallic carbon nanotubes

Yasushi Matsunaga, Tadatsugu Hatori, Tomokazu Kato

Research output: Contribution to journalReview article

Abstract

We estimate the optimum electric field at the sheath edge and the minimum interval among nanotubes to promote the growth of armchair-type nanotubes (metallic character) as a function of the nanotube length. On the basis of the electric charge distribution in a nanotube and the optimum electric field E 1* at the tip of a nanotube evaluated using the Hückel-Poisson method, we calculate the structure of the electric field lines outside a nanotube in the sheath region. As the nanotube length increases, E1* decreases. To maintain the chemical activity at the tip, the sheath electric field must be decreased. We show the decreasing rate of the sheath electric field with respect to the nanotube length.

Original languageEnglish
Pages (from-to)1877-1879
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number3 A
DOIs
Publication statusPublished - 2006 Mar 8

Keywords

  • Armchair type
  • Carbon nanotube
  • Frontier electron density
  • Hückel-Poisson method
  • Metallic carbon nanotube
  • Selective production of metallic nanotubes
  • Sheath electric field

ASJC Scopus subject areas

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

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