Synthesis, structure, and field emission properties of sulfur-doped nanocrystalline diamond

The synthesis and properties of sulfur-doped nanocrystalline diamond films were investigated. The films were deposited by hot-filament chemical vapor deposition on Mo substrates using methane, hydrogen, and hydrogen disulfide. The nanocrystalline nature of the material arises from the induction of c...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2006-06, Vol.17 (6), p.443-451
Main Authors: Morell, G, Gonzalez-Berrios, A, Weiner, B R, Gupta, S
Format: Article
Language:English
Subjects:
Carbon
Chemical vapor deposition
Diamond films
Diamond tools
Field emission
Nanocrystals
Nanostructure
Semiconductors
Synthesis
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Summary:The synthesis and properties of sulfur-doped nanocrystalline diamond films were investigated. The films were deposited by hot-filament chemical vapor deposition on Mo substrates using methane, hydrogen, and hydrogen disulfide. The nanocrystalline nature of the material arises from the induction of continuous secondary nucleation in the chemical vapor deposition environment. Complementary characterization tools were employed in order to obtain a comprehensive and coherent understanding of the correlations between the structural and electronic properties. In particular, sulfur-doped nanocrystalline diamond films show n-type Hall conductivity, enhanced field emission properties, and insensitivity to ion radiation. It was found that n-type doping of the tetragonally-bonded carbon matrix together with a nano network of trigonally-bonded carbon are crucial elements for enhanced field emission from nanocrystalline diamond. These conclusions and the corresponding supporting evidence are discussed.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-006-8090-y