Nano Archive

Vacuum-breakdown-induced needle-shaped ends of multiwalled carbon nanotube yarns and their field emission applications

Wei, Yang and Jiang, Kaili and Liu, Liang and Chen, Zhuo and Fan, Shoushan (2007) Vacuum-breakdown-induced needle-shaped ends of multiwalled carbon nanotube yarns and their field emission applications. NANO LETTERS, 7 (12). pp. 3792-3797.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl072298y

Abstract

The Joule-heating-induced vacuum breakdown of the carbon nanotube (CNT) yarns was studied. Wall-by-wall breakdown and superplastic deformation of CNTs are the main physical processes at the hottest location before breakdown. The two ends at the breaking point are needle-shaped with surfaces rich in tightly compacted conelike CNT bundles with a single CNT at the tips. Both of the ends can provide emission currents of over 150 mu A within an area 5 mu m in diameter; the cathode ends start field emission at a lower voltage. Laser irradiation was introduced to control the breaking location making the methodology more practical. Small pixels were constructed with the yarn emitter cathodes, which are potentially building blocks of large outdoor displays.

Item Type:Article
Subjects:Physical Science > Nano objects
Physical Science > Nanoelectronics
Engineering > Nanotechnology applications in ICT
ID Code:535
Deposited By:IoN
Deposited On:20 Jan 2009 14:56
Last Modified:20 Jan 2009 14:56

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