Stabilization of electron emission from nanoneedles with two dimensional graphene sheet structure in a high residual pressure region
Stabilization of electron emission from nanoneedles with two dimensional graphene sheet structure in a high residual pressure region
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DOI：
10.1063/1.2711191
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发表时间：
2007-03
影响因子：
4
通讯作者：
Takahiro Matsumoto;Y. Neo;H. Mimura;M. Tomita;Nariyuki Minami
中科院分区：
文献类型：
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作者：
Takahiro Matsumoto;Y. Neo;H. Mimura;M. Tomita;Nariyuki Minami
采用二维石墨烯片状结构的纳米针阴极，通过热场工作，获得了高剩余压(10−5Torr)下稳定的场发射。获得了1012Asr−1M−2量级的高亮度电子发射和稳定的发射。通过构建一个紧凑的有限元扫描电子显微镜系统来验证稳定阴极的性能，并在10−5Torr以上的残余压力下获得了清晰的有限元扫描电子显微镜图像。基于泊松分布，讨论了发射电流随阴极温度变化的规律。
A stable field emission (FE) under a high residual pressure (10−5Torr) was obtained by the thermal field operation of a nanoneedle cathode with a two dimensional graphene sheet structure. A high brightness electron emission of the order of 1012Asr−1m−2, as well as stable emission, was achieved. The performance of the stabilized cathode was demonstrated by the construction of a compact FE scanning electron microscope (SEM) system, and clear FE-SEM images were obtained at a residual pressure above 10−5Torr. The emission current fluctuation as a function of cathode temperature was discussed based on the Poisson distribution.