Vertically aligned carbon nanotube growth from Ni nanoparticles prepared by ion implantation

T. Iwasaki, S. Mejima, T. Koide, R. Morikane, H. Nakayama, T. Shinada, I. Ohdomari, H. Kawarada

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Vertically aligned carbon nanotubes (CNTs) were synthesized from Ni nanoparticles prepared by ion implantation. Ni ions were implanted at 30 keV into thermally grown SiO2 substrates using a focused-ion-beam. High-density nanoparticle formation was investigated with high doses up to 5.0 × 1017 ions/cm2. Dense Ni nanoparticles in the order of 1011-1012 cm- 2 were obtained on a SiO2 substrate, and the particle density and diameter were controlled by post-implantation annealing. Particles annealed at 700 °C led to vertically aligned CNTs. Interestingly, catalysts were longer along the vertical axis and the lower half of the Ni particle was buried in SiO2.

Original languageEnglish
Pages (from-to)1443-1446
Number of pages4
JournalDiamond and Related Materials
Volume17
Issue number7-10
DOIs
Publication statusPublished - 2008 Jul 1
Externally publishedYes

Keywords

  • Carbon nanotube
  • Ion implantation
  • Nanoparticle
  • Vertically aligned

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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