Field emission properties of single-walled carbon nanotubes with a variety of emitter morphologies

Yosuke Shiratori, Koji Furuichi, Suguru Noda, Hisashi Sugime, Yoshiko Tsuji, Zhengyi Zhang, Shigeo Maruyama, Yukio Yamaguchi

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Field emission properties of single-walled carbon nanotubes (SWCNTs), which were prepared through alcohol catalytic chemical vapor deposition for 10-60s, were characterized in a diode configuration. Protrusive bundles at the top surface of samples act selectively as emission sites. The number of emission sites was controlled by emitter morphologies combined with texturing of Si substrates. SWCNTs grown on a textured Si substrate exhibited a turn-on field as low as 2.4 V/μm at a field emission current density of 1 μA/cm 2. Uniform spatial luminescence (0.5 cm2) from the rear surface of the anode was revealed for SWCNTs prepared on the textured Si substrate. Deterioration of field emission properties through repetitive measurements was reduced for the textured samples in comparison with vertically aligned SWCNTs and a random network of SWCNTs prepared on flat Si substrates. Emitter morphology resulting in improved field emission properties is a crucial factor for the fabrication of SWCNT-electron sources. Morphologically controlled SWCNTs with promising emitter performance are expected to be practical electron sources.

Original languageEnglish
Pages (from-to)4780-4787
Number of pages8
JournalJapanese journal of applied physics
Volume47
Issue number6 PART 1
DOIs
Publication statusPublished - 2008 Jun 13

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Keywords

  • Alcohol catalytic chemical vapor deposition
  • Ethanol
  • Field emission
  • Raman spectroscopy
  • Single-walled carbon nanotube
  • Textured Si

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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