Field emission from carbon nanotubes; purified single-walled and multi- walled tubes

Yahachi Saito, Koji Hamaguchi, Koichi Hata, Kazuyuki Tohji, Atsuo Kasuya, Yuichiro Nishina, Kunio Uchida, Yoshiharu Tasaka, Fumikazu Ikazaki, Motoo Yumura

Research output: Contribution to journalConference articlepeer-review

101 Citations (Scopus)

Abstract

Field emission microscopy of single-walled nanotubes (SWNTs) and multi- walled nanotubes (MWNTs) was performed. A bulk bundle (diameter 0.01 - 0.1 mm and length 1 - 2 mm) of SWNTs and MWNTs, which were obtained after purification processes of carbon soot containing respective nanotubes, was used as an electron emitter. For SWNTs, field emission (FE) originating from individual micro-bundles (with diameter 10 - 20 nm) was observed. Each micro- bundle gave only a bright spot without fine structure. For MWNTs, hollow ring patterns were observed since the caps of purified MWNTs used in the present study were open. Current vs. voltage characteristics were also measured by using a probe hole device, and the Fowler-Nordheim plot yielded a straight line in low current regions for both SWNTs and MWNTs.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalUltramicroscopy
Volume73
Issue number1-4
DOIs
Publication statusPublished - 1998 Jun 1
EventProceedings of the 1997 44th International Field Emission Symposium - Tsukuba, Jpn
Duration: 1997 Jul 71997 Jul 11

Keywords

  • Carbon nanotubes
  • Electron sources
  • Field emission microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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