Carbon nanotube on a Si tip for electron field emitter

Phan Ngoc Minh, Le T.T. Tuyen, Takahito Ono, Hidenori Mimura, Kuniyoshi Yokoo, Masayoshi Esashi

Research output: Contribution to journalLetter

11 Citations (Scopus)

Abstract

In this letter, the results of selective growth and electron field emission characterization of an individual carbon nanotube on a Si tip are presented. An individual, multiwall carbon nanotube was grown vertically at the apex of a microfabricated Si tip using hot-filament chemical vapor deposition with a mixture of C2H2 and H2 gases. During the growth process, an electrical filed of 5 × 104 V/m was applied between the Si tip and a filament to electrically enhance the growth of the carbon nanotube from the apex of the tip. The carbon nanotube with a diameter of 4-25 nm and a length of 300-400 nm was vertically aligned from the apex of the Si tip. Electron field emission characteristics of the single Si tip with and without the individual carbon nanotube on the same substrate were measured at room temperature in a vacuum of 1.7 × 10-4 Pa. The threshold voltages were approximately 40 V (4 V/μm) and 200 V (20 V/μm) for the Si tips with and without the carbon nanotube, respectively.

Original languageEnglish
Pages (from-to)L1409-L1411
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume41
Issue number12 A
DOIs
Publication statusPublished - 2002 Dec 1

Keywords

  • Carbon nanotubes
  • Hot-filament chemical vapor deposition
  • Multi-electron-beam lithography

ASJC Scopus subject areas

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

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