Enhancement of field emission characteristics of tungsten emitters by single-walled carbon nanotube modification

D. Ferrer, T. Tanii, I. Matsuya, G. Zhong, S. Okamoto, H. Kawarada, T. Shinada, I. Ohdomari

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We present a simple method for improving the field emission performance of tungsten-tip electron sources based on single-walled carbon nanotube (SWCNT) modification. By coating a sandwich-like thin film of Al-Fe-Al (with Fe as a catalyst) on a tungsten tip, SWCNTs were synthesized at 600°C in a chemical vapor deposition (CVD) reactor. The influence of CNT modification on the electron emission characteristics of the emitters was investigated by means of a triode structure. We have found that CNT-modified tungsten tips exhibit low threshold-voltage for electron emission, and improved emission-current stability, compared with nonmodified and Al-Fe-Al-coated needles.

Original languageEnglish
Article number033116
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume88
Issue number3
DOIs
Publication statusPublished - 2006 Jan 30

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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