Time-dependent density functional study of field emission from nanotubes composed of C, BN, SiC, Si, and GaN

Joseph A. Driscoll, Sergiy Bubin, William R. French, Kalman Varga

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Field emission from various types of nanotubes is studied by propagating the electronic density in real space and time using time-dependent density functional theory. Capped (5, 5) C, BN, SiC, Si, and GaN nanotubes are considered. The GaN, SiC, and Si nanotubes were found to be significantly better field emitters than C and BN nanotubes, both in terms of current magnitude and sharpness of peaks in the energy spectra. By analyzing the electronic structure of the various systems it is seen that the nanotubes with the highest currents have electron densities that extend significantly from the nanotube in the emission direction.

Original languageEnglish
Article number285702
JournalNanotechnology
Volume22
Issue number28
DOIs
Publication statusPublished - Jul 15 2011

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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