Field emission from short and stubby vertically aligned carbon nanotubes

M. Chhowalla, C. Ducati, N. L. Rupesinghe, K. B.K. Teo, G. A.J. Amaratunga

Research output: Contribution to journalArticlepeer-review

149 Citations (Scopus)


Electron emission from vertically aligned carbon nanotubes grown by plasma enhanced chemical vapor deposition has been measured using a parallel plate anode and a 1 μm tungsten probe. The field emission characteristics were measured as a function of the nanotube diameter, length, and areal density. It was found that less densely populated "short and stubby" nanotubes with diameters of 200 nm and heights of 0.7 μm showed the best emission characteristics with a threshold voltage of 2 V/μm and saturation emission current density of 10 mA/cm2. A triple junction between nanotube, substrate, and vacuum is proposed to explain our results.

Original languageEnglish
Pages (from-to)2079-2081
Number of pages3
JournalApplied Physics Letters
Issue number13
Publication statusPublished - Sep 24 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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