Direct correlation of surface morphology with electron emission sites for intrinsic nanocrystalline diamond films

F. A M Köck, J. M. Garguilo, Robert Nemanich

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Field emission properties of nanocrystalline diamond films show low turn-on fields resulting in significant electron emission at low applied fields originating from individual sites with an emission site density of ∼104/cm2. We have employed a high resolution electron emission microscope operating in field emission mode to image the spatial distribution of emission sites for intrinsic nanocrystalline diamond thin films. The location of individual emission sites has been directly correlated to the surface morphology probed by scanning electron microscopy. Surface topography measurements show fine structured features consisting of micron and submicron domains separated by grain boundaries. No preferred topographic features that would account for field emission can be detected suggesting that the electronic structure of the grains and their boundaries under a high electric field has to be considered in order to account for the observed emission characteristics.

Original languageEnglish (US)
Pages (from-to)1022-1025
Number of pages4
JournalDiamond and Related Materials
Volume13
Issue number4-8
DOIs
StatePublished - Apr 2004
Externally publishedYes

Fingerprint

Electron emission
Diamond films
diamond films
Field emission
electron emission
Surface morphology
field emission
Surface topography
Spatial distribution
Electronic structure
Grain boundaries
Microscopes
Electric fields
Thin films
topography
spatial distribution
Scanning electron microscopy
grain boundaries
diamonds
microscopes

Keywords

  • Field emission
  • Nanocrystalline
  • Plasma chemical vapor deposition

ASJC Scopus subject areas

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

Cite this

Direct correlation of surface morphology with electron emission sites for intrinsic nanocrystalline diamond films. / Köck, F. A M; Garguilo, J. M.; Nemanich, Robert.

In: Diamond and Related Materials, Vol. 13, No. 4-8, 04.2004, p. 1022-1025.

Research output: Contribution to journalArticle

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