In situ study of field emission vacuum breakdown of individual multi-wall carbon nanotube
In situ study of field emission vacuum breakdown of individual multi-wall carbon nanotube
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单根多壁碳纳米管场发射真空击穿的原位研究
DOI：
10.1049/mnl.2018.5253
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发表时间：
2019
影响因子：
1.3
通讯作者：
Deng Shaozhi
中科院分区：
文献类型：
--
作者：
Liu Zhenkun;Zhang Yu;Zhao Peng;Ye Yuan;Chen Jun;Xu Ningsheng;Deng Shaozhi
利用原位场发射结合扫描电镜系统对单根碳纳米管场发射过程中的真空击穿临界条件进行了实验研究。结果表明，碳纳米管的临界击穿电场与其长度和直径有关。碳纳米管具有较短的长度和较大的直径，可以承受较高的电场。其机理与碳纳米管的散热能力有关。较小长度和较大直径的CNT具有较好的散热性。结果与理论计算相符，有助于从一个直观的角度理解场致发射过程中碳纳米管真空击穿的物理机制。
The vacuum breakdown critical condition of individual carbon nanotube (CNT) during field emission was investigated experimentally using the in‐situ field emission combined scanning electron microscope system. The results showed that the critical breakdown electric field of CNT was related to its length and diameter. CNT which has a shorter length and larger diameter could bear higher electric field. The underlying mechanism was attributed to the heat dissipation ability of CNT. A smaller length and larger diameter CNT has better heat dissipation. The results met with the theoretical calculations and helped to understand the physics mechanism of vacuum breakdown of CNT during field emission in a visual perspective.