Oriented carbon microfibers grown by catalytic decomposition of acetylene and their field emission properties

Y. J. Li, Shu Ping Lau, B. K. Tay, G. Y. Chen, Z. Sun, J. S. Chen, G. F. You, D. Sheeja

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

Abstract

Carbon fibers with a diameter approximately 1-2 μm have been synthesized by thermal chemical vapor deposition with a mixture of nitrogen and acetylene on nickel-coated silicon substrates in a furnace. The growth temperature was 1000°C. Scanning electron microscopy micrographs showed that grass-like oriented carbon microfibers were produced with a relatively high density of 107/cm2. Nodular carbon structures could be obviously observed along the micro-fibers. This may suggest that those adjacent carbon spherulites probably grew simultaneously upwards to construct the oriented microfibers. The early growth of oriented carbon microfibers was possibly confined by the porous structures of nickel catalyst, which were formed while heat treatment. A threshold electric field as low as 2 V/μm and an emission site density of 104/cm2could be achieved from the oriented carbon microfibers.
Original languageEnglish
Pages (from-to)878-882
Number of pages5
JournalDiamond and Related Materials
Volume10
Issue number3-7
DOIs
Publication statusPublished - 1 Mar 2001
Externally publishedYes

Keywords

  • Acetylene
  • Field emission
  • Microfibers
  • Thermal chemical vapor deposition

ASJC Scopus subject areas

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

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