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Type: Artigo de periódico
Title: Electron field emission from boron doped microcrystalline diamond
Author: Roos, M
Baranauskas, V
Fontana, M
Ceragioli, HJ
Peterlevitz, AC
Mallik, K
Degasperi, FT
Abstract: Field emission properties of hot filament chemical vapor deposited boron doped polycrystalline diamond have been studied. Doping level (N-B) of different samples has been varied by the B/C concentration in the gas feed during the growth process and doping saturation has been observed for high B/C ratios. Threshold field (E-th) for electron emission as function of B/C concentration has been measured, and the influences of grain boundaries, doping level and surface morphology on field emission properties have been investigated. Carrier transport through conductive grains and local emission properties of surface sites have been figured out to be two independent limiting effects in respect of field emission. Emitter current densities of 500 nA cm(-2) were obtained using electric fields less than 8 V/mu m. (c) 2007 Elsevier B.V. All rights reserved.
Subject: boron doped diamond surface
electron field emission
chemical vapor deposited diamond
threshold field for electron emission
emission properties of surface sites
Country: Holanda
Editor: Elsevier Science Bv
Citation: Applied Surface Science. Elsevier Science Bv, v. 253, n. 18, n. 7381, n. 7386, 2007.
Rights: fechado
Identifier DOI: 10.1016/j.apsusc.2007.03.023
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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