Stable Field Emitters for a Miniature X-ray Tube Using Carbon Nanotube Drop Drying on a Flat Metal Tip

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Stable carbon nanotube (CNT) field emitters for a vacuum-sealed miniature X-ray tube have been fabricated. The field emitters with a uniform CNT coating are prepared by a simple drop drying of a CNT mixture solution that is composed of chemically modified multi-walled CNTs, silver nanoparticles, and isopropyl alcohol on flat tungsten tips. A highly thermal- and electrical-conductive silver layer strongly attaches CNTs to the tungsten tips. Consequently, the field emitters exhibit good electron emission stability: continuous electron emission of around 100 mu A at 2.3 V/mu m has stably lasted over 40 h even at non-high vacuum ambient (similar to 10(-3) Pa).
Publisher
SPRINGER
Issue Date
2010-04
Language
English
Article Type
Article
Keywords

ELECTRON SOURCES; EMISSION; BRACHYTHERAPY

Citation

NANOSCALE RESEARCH LETTERS, v.5, no.4, pp.720 - 724

ISSN
1931-7573
DOI
10.1007/s11671-010-9537-x
URI
http://hdl.handle.net/10203/97069
Appears in Collection
NE-Journal Papers(저널논문)
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