Field Emission from a New Form of Thin Film Amorphous Carbon Having Nanoparticle Inclusions and Carbon Nanotubes

Gehan A J Amaratunga, Mark Baxendale, Nalin Rupesinghe, Ioannis Alexandrou, Manish Chhowalla, Tim Butler, Amith Munindradasa, Chris J. Kiley, Li Zhang, Tadashi Sakai

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Field emission results from a new form of carbon thin film are reported. The films contain carbon nanoparticles (nanotubes, "onions" and "eggs") within an amorphous carbon matrix and are deposited using a carbon arc with a localized high-pressure gas region of He of N2. The films formed in an N2 environment have a nitrogenated amorphous carbon (a-C:N) matrix and show clear Fowler-Nordheim-type metallic field emission characteristics. The field emission is very similar to that obtained from pure, randomly oriented multi-wall and single-wall nanotube films. It is proposed that the new a-C:N/nanoparticle films emit electrons through conducting channels formed in the film, subsurface field emission into the a-C:N matrix and hot electron surmounting of the surface potential barrier between the a-C:N and vacuum. Field enhancement factors of over 1000 are calculated for the thin film emitters when the nanoparticle work function is taken as 5 eV. This class of a-C:N/ nanoparticle film has the potential to be a thin film equivalent to carbon nanotubes in terms of field emission.

Original languageEnglish
Pages (from-to)31-51
Number of pages21
JournalNew Diamond and Frontier Carbon Technology
Volume9
Issue number1
Publication statusPublished - 1999

Fingerprint

Carbon Nanotubes
Amorphous carbon
Field emission
field emission
Carbon nanotubes
nanotubes
carbon nanotubes
inclusions
Nanoparticles
Thin films
nanoparticles
carbon
thin films
Carbon films
Nanotubes
Hot electrons
carbon arcs
Surface potential
eggs
Carbon

Keywords

  • a-C
  • a-C:N
  • Field emission
  • Nanotubes

ASJC Scopus subject areas

  • Materials Science(all)
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Amaratunga, G. A. J., Baxendale, M., Rupesinghe, N., Alexandrou, I., Chhowalla, M., Butler, T., ... Sakai, T. (1999). Field Emission from a New Form of Thin Film Amorphous Carbon Having Nanoparticle Inclusions and Carbon Nanotubes. New Diamond and Frontier Carbon Technology, 9(1), 31-51.

Field Emission from a New Form of Thin Film Amorphous Carbon Having Nanoparticle Inclusions and Carbon Nanotubes. / Amaratunga, Gehan A J; Baxendale, Mark; Rupesinghe, Nalin; Alexandrou, Ioannis; Chhowalla, Manish; Butler, Tim; Munindradasa, Amith; Kiley, Chris J.; Zhang, Li; Sakai, Tadashi.

In: New Diamond and Frontier Carbon Technology, Vol. 9, No. 1, 1999, p. 31-51.

Research output: Contribution to journalArticle

Amaratunga, GAJ, Baxendale, M, Rupesinghe, N, Alexandrou, I, Chhowalla, M, Butler, T, Munindradasa, A, Kiley, CJ, Zhang, L & Sakai, T 1999, 'Field Emission from a New Form of Thin Film Amorphous Carbon Having Nanoparticle Inclusions and Carbon Nanotubes', New Diamond and Frontier Carbon Technology, vol. 9, no. 1, pp. 31-51.
Amaratunga, Gehan A J ; Baxendale, Mark ; Rupesinghe, Nalin ; Alexandrou, Ioannis ; Chhowalla, Manish ; Butler, Tim ; Munindradasa, Amith ; Kiley, Chris J. ; Zhang, Li ; Sakai, Tadashi. / Field Emission from a New Form of Thin Film Amorphous Carbon Having Nanoparticle Inclusions and Carbon Nanotubes. In: New Diamond and Frontier Carbon Technology. 1999 ; Vol. 9, No. 1. pp. 31-51.
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