Analytical optimization for field emission of carbon nanotube array  

作　　者：WANG XinQing LI Liang CHEN Min JIN HongXiao JIN DingFeng PENG Min GE HongLiang 

机构地区：[1]College of Materials Science and Engineering, Zhejiang Province Key Laboratory of Magnetism, China Jiliang University, Hangzhou 310018, China [2]Hangzhou No. 14 Middle School of Zhejiang Province, Hangzhou 310018, China

出　　处：《Chinese Science Bulletin》2009年第10期1801-1804,共4页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 10647149, 20571067 and 20801050)

摘　　要：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.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.

关 键 词：碳纳米管阵列 场发射 优化 发射电流密度 场增强因子 有限元分析 距离 CNT 

分 类 号：O462.4[理学—电子物理学] TB383[理学—物理]