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

Heo, Sung Hwan and Ihsan, Aamir and Yoo, Seung Hwa and Ali, Ghafar and Cho, Sung Oh (2010) Stable Field Emitters for a Miniature X-ray Tube Using Carbon Nanotube Drop Drying on a Flat Metal Tip. Nanoscale Research Letters, 5 (4). pp. 720-724.

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Official URL: http://www.springerlink.com/content/f317848u4083k2...

Abstract

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 μA at 2.3 V/μm has stably lasted over 40 h even at non-high vacuum ambient (~10−3 Pa).

Item Type:Article
Uncontrolled Keywords:Carbon nanotube - Field emission - Drop drying - Miniature X-ray tube
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:8833
Deposited By:IoN
Deposited On:14 May 2010 16:00
Last Modified:14 May 2010 16:00

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