Growth and field emission properties of small diameter carbon nanotube films

Y. Y. Wang, S. Gupta, J. M. Garguilo, Z. J. Liu, L. C. Qin, Robert Nemanich

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Vertically aligned carbon nanotube films with diameters smaller than 5 nm, high densities up to 1012/cm2, and lengths of ∼ 5-8 μm were deposited by microwave plasma-assisted chemical vapor deposition. Experiments show that, by continuous reduction in the thickness of the iron film (i.e., ∼0.3-0.5 nm), small diameter carbon nanotubes can be achieved with diameters that ranged from 1-5 nm, and the films are comprised of both single- and double-wall nanotubes. The electron field emission properties of the films were investigated by variable distance field emission and temperature-dependent field electron emission microscopy (T-FEEM). The films showed an emission site density of ∼104/cm2 and a threshold field of 2.8 V/μm similar to multiwalled nanotubes (1.9 V/μm). In addition, they also exhibited a temperature dependence of the emission site intensity.

Original languageEnglish (US)
Pages (from-to)714-718
Number of pages5
JournalDiamond and Related Materials
Volume14
Issue number3-7
DOIs
StatePublished - Mar 2005
Externally publishedYes

Fingerprint

Carbon Nanotubes
Field emission
field emission
Carbon nanotubes
carbon nanotubes
Nanotubes
electron emission
nanotubes
Electron emission
Chemical vapor deposition
Microscopic examination
Iron
Microwaves
vapor deposition
microscopy
Plasmas
microwaves
iron
Temperature
temperature dependence

Keywords

  • Field emission
  • Growth
  • MWCVD
  • Small diameter carbon nanotubes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Growth and field emission properties of small diameter carbon nanotube films. / Wang, Y. Y.; Gupta, S.; Garguilo, J. M.; Liu, Z. J.; Qin, L. C.; Nemanich, Robert.

In: Diamond and Related Materials, Vol. 14, No. 3-7, 03.2005, p. 714-718.

Research output: Contribution to journalArticle

Wang, Y. Y. ; Gupta, S. ; Garguilo, J. M. ; Liu, Z. J. ; Qin, L. C. ; Nemanich, Robert. / Growth and field emission properties of small diameter carbon nanotube films. In: Diamond and Related Materials. 2005 ; Vol. 14, No. 3-7. pp. 714-718.
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