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Browse Journals & Magazines > Applied Physics Letters ...> Volume:91 Issue:6 Help

On the enhancement of field emission performance of ultrananocrystalline diamond coated nanoemitters

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5 Author(s)
Tzeng, Yu-Fen ; Department of Materials Science and Engineering, National Tsing Hua University, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30043, Taiwan, Republic of China ; Lee, Yen-Chih ; Lee, Chi-Young ; Lin, I.-Nan
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Ultrananocrystalline diamond (UNCD) nanoemitters were synthesized by a microwave plasma enhanced chemical vapor deposition process using silicon nanowires (SiNWs) as the template. Preseeding markedly enhances the nucleation of diamond on the SiNW templates, resulting in UNCD grains of smaller size and uniform distribution, which leads to significantly improved electron field emission (EFE) properties. The EFE for UNCD nanoemitters can be turned on at (E0)UNCD-NE=4.4 V/μm, achieving large EFE current density, (Je)UNCD-NE=13.9 mA/cm2 at an applied field of 12 V/μm, which is comparable with that of carbon nanotubes, but with much better processing reliability.

Published in:
Applied Physics Letters  (Volume:91 ,  Issue: 6 )

Date of Publication: Aug 2007

Page(s):
063117 - 063117-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.2768880
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Aug 2007

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