Field emission properties of a carbon nanotube cathode in different electric field modes
Field emission properties of a carbon nanotube cathode in different electric field modes
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不同电场模式下碳纳米管阴极的场发射特性
DOI：
10.1016/j.matlet.2007.10.046
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Xiaoqin Yan
中科院分区：
文献类型：
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作者：
Qingliang Liao;Yue Zhang;J. Qi;Yunhua Huang;Z. Gao;L. Xia;Xiaoqin Yan
采用喷射沉积法制备了大面积碳纳米管阴极。在直流和脉冲模式下对阴极的发射特性进行了研究。在直流模式下，阴极具有较高的场增强系数和发射电流密度。在脉冲模式下，从阴极获得了稳定的强流电子束。在16.7V/μm的电场下，电子束的平均电流密度为108A/cm2。对电子束的均匀性和质量进行了研究，结果表明，电子束的均匀性和质量都很好。碳纳米管阴极不仅适用于场发射显示，也适用于高功率微波器件的应用。
A large area carbon nanotube cathode was fabricated by spray deposition. The emission properties of the cathode were investigated in both direct current and pulse mode experiments. In the direct current mode, the cathode has high field enhancement factor and high emission current density. In the pulse mode, steady intense-current electron beams were obtained from the cathode. The average current density is 108 A/cm2at an electric field of 16.7 V/μm. The uniformity and quality of electron beams were investigated, and they were very good. The carbon nanotube cathode is suitable for not only field emission display applications but also high-power microwave device applications.