Pulsed laser ablation of graphite in O2 atmosphere for preparation of diamond films and carbon nanotubes

K. Nakajima, M. Furusawa, T. Yamamoto, J. Tashiro, A. Sasaki, T. Chikyow, P. Ahmet, H. Yamada, M. Yoshimoto

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Spatially and time-resolved optical emission analysis was carried out for the plasma plume produced by KrF excimer laser ablation of graphite in various oxygen atmospheres. Furthermore, highly ordered carbon nanofibers were fabricated by pulsed laser ablation using a graphite target containing approximately 1 mol.% metal oxide, such as NiO. In our laser ablation process, carbon nanofibers are deposited in an oxygen atmosphere. From the optical emission study, the visible carbon plasma plume in O2 gas was found to be dominated by the emission of C2 molecules and C atoms. Emission of a C2 Swan band was strongly observed near the substrate under the diamond growth conditions (0.1-0.15 torr O2). From the time-resolved emission study, ablated carbon particles were estimated to have a high kinetic energy of approximately 10 eV.

Original languageEnglish
Pages (from-to)953-956
Number of pages4
JournalDiamond and Related Materials
Volume11
Issue number3-6
DOIs
Publication statusPublished - 2002 Mar
Externally publishedYes

Keywords

  • Carbon nanofiber
  • Diamond films
  • Graphite
  • Physical vapor deposition
  • Spectroscopy

ASJC Scopus subject areas

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

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