Fabrication of ion-induced carbon-cobalt nanocomposite fibers: Effect of cobalt supply rate

Zhipeng Wang, Mohd Zamri Mohd Yusop, Takehiko Hihara, Pradip Ghosh, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Graphite surfaces were irradiated by argon (Ar +) ions at 1 keV with a simultaneous cobalt (Co) supply at room temperature. Various kinds of carbon nanocomposites, such as nanocones with and without single nanofibers on their tops, nanorods and fish-scale-like nanoprotrusions, were formed depending on Co supply rates. It has been observed that with increasing the Co supply rate the formation of nanoprotrusions without nanofibers became prominent. Both nanofibers and nanoprotrusions were surely composed of carbon and Co, as confirmed by energy-dispersive X-ray analysis. The cobalt carbon nanocomposite fibers (CCNFs), ∼1.5 μm in average length, were grown on the top of the nanocones at the Co supply rate of 1.0 nm/min. The field electron emission characteristics of CCNFs thus grown indicated that there is an optimum parameter for the CCNF growth to achieve the better emission performance than that of pristine Ar +-induced carbon nanofibers

Original languageEnglish
Pages (from-to)10677-10681
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number12
DOIs
Publication statusPublished - Dec 1 2011
Externally publishedYes

Keywords

  • Carbon
  • Cobalt
  • Filed electron emission
  • Ion irradiation
  • Nanocomposite fiber

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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