Morphological control of ion-induced carbon nanofibers and their field emission properties

Mohd Zamri Bin Mohd Yusop, Pradip Ghosh, Zhipeng Wang, Masaki Tanemura, Yasuhiko Hayashi, Tetsuo Soga

Research output: Contribution to journalArticle

Abstract

Carbon nanofibers (CNFs) were fabricated on graphite plates using "Ar+ ion sputtering method" in large amount at room temperature. The morphology of CNFs was controlled by a simultaneous carbon supply during ion sputtering. CNF-tipped cones were formed on graphite plate surfaces without carbon supply whereas those with a simultaneous carbon supply featured mainly needle-like protrusions of large size. The field electron emission (FE) properties, measured using parallel plate configurations in 10-4 Pa range, showed the threshold fields of 4.4 and 5.2 V/μm with a current density of 1 μA/cm2 for CNF-tipped cones and needle-like protrusion, respectively. Reliability test results indicated that CNF-tipped cones were more stable than needle-like protrusion. The morphological change after reliability test showed a so-called "self-regenerative" process and structure damage for CNF-tipped cones and needle-like protrusions, respectively.

Original languageEnglish
Pages (from-to)1449-1453
Number of pages5
JournalIEICE Transactions on Electronics
VolumeE92-C
Issue number12
DOIs
Publication statusPublished - Jan 1 2009
Externally publishedYes

Keywords

  • Carbon nanofiber
  • Field electron emission
  • Ion sputtering
  • Morphological control

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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