Journal
APPLIED PHYSICS LETTERS
Volume 78, Issue 16, Pages 2339-2341Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1366369
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The observation of electron emission from amorphous carbon thin films at low applied electric fields is explained in terms of an enhancement of the field brought about by dielectric inhomogeneities within the film. These inhomogeneities originate from the differences between conductive, spatially localized sp(2) C clusters surrounded by a more insulating sp(3) matrix. By a more complete understanding of the concentration and distribution of the clusters, a generic model for field emission from amorphous carbon thin films can be developed. Extensions of this model to explain the emission properties of carbon nanotubes and carbon nanocomposite materials are also presented. (C) 2001 American Institute of Physics.
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