Analytical optimization for field emission of carbon nanotube array

To optimize field emission （FE） property of carbon nanotube （CNT） array on a planar cathode surface, the Fowler-Nordheim formula has been used to discuss the maximum of the emission current density with the floating sphere model in this paper. The emission current density is dominating as the analyt...

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Bibliographic Details
Published in:Chinese science bulletin 2009-05, Vol.54 (10), p.1801-1804
Main Authors: Wang, XinQing, Li, Liang, Chen, Min, Jin, HongXiao, Jin, DingFeng, Peng, Min, Ge, HongLiang
Format: Article
Language:English
Subjects:
Brief Communication/Condensed Matter Physics
Chemistry/Food Science
CNT
Earth Sciences
Engineering
Humanities and Social Sciences
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
发射电流密度
场发射
场增强因子
有限元分析
碳纳米管阵列
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Summary:To optimize field emission （FE） property of carbon nanotube （CNT） array on a planar cathode surface, the Fowler-Nordheim formula has been used to discuss the maximum of the emission current density with the floating sphere model in this paper. The emission current density is dominating as the analytical Fowler-Nordheim function of the intertube distance, and the maximum of the emission current density is deduced and discussed. The results indicate that the intertube distance in CNT array critically affects the field enhancement factor and the emission current density, whose maximum occurs at the intertube distance approximating a tenth of the tube height. Considering the emission current density and the field enhancement factor, the FE can be optimized analytically when the intertube distance is about a tenth of the tube height.
ISSN:1001-6538
2095-9273
1861-9541
2095-9281
DOI:10.1007/s11434-009-0247-7