Electron field emission from single-walled carbon nanotube nonwoven
Song Li (宋礼)ab, Liu Shuang (刘双)a, Zhang Geng-Min (张耿民)c, Liu Li-Feng (刘利峰)ab, Ma Wen-Jun (马文君)ab, Liu Dong-Fang (刘东方)ab, Zhao Xiao-Wei (赵小伟)ab, Luo Shu-Dong (罗述东)ab, Zhang Zeng-Xing (张增星)ab, Xiang Yan-Juan (向彦娟)ab, Shen Jun (沈俊)a, Zhou Jian-Jun (周建军)a, Wang Gang (王刚)a, Zhou Wei-Ya (周维亚)a
a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; b Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; c Department of Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
Abstract Field emission from single-walled carbon nanotube (SWNT) nonwoven has been investigated under high vacuum with different vacuum gaps. A low turn-on electric field of 1.05\,V/$\mu $m is required to reach an emission current density of 10 $\mu $A/cm$^{2}$. An emission current density of 10 mA/cm$^{2}$ is obtained at an operating electric field of 1.88\,V/$\mu $m. No current saturation is found even at an emission current of 5\,mA. With the vacuum gap increasing from 1 to 10 mm, the turn-on field decreases monotonically from 1.21 to 0.68\,V/$\mu $m, while the field amplification is augmented. The good field-emission behaviour is ascribed to the combined effects of the intrinsic field emission of SWNT and the waved topography of the nonwoven.
Received: 09 September 2005
Revised: 14 September 2005
Accepted manuscript online:
PACS:
79.70.+q
(Field emission, ionization, evaporation, and desorption)
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10334060 and 50572119) and ``973'' National Basic Research Project (Grant No 2005CB623602).
Cite this article:
Song Li (宋礼), Liu Shuang (刘双), Zhang Geng-Min (张耿民), Liu Li-Feng (刘利峰), Ma Wen-Jun (马文君), Liu Dong-Fang (刘东方), Zhao Xiao-Wei (赵小伟), Luo Shu-Dong (罗述东), Zhang Zeng-Xing (张增星), Xiang Yan-Juan (向彦娟), Shen Jun (沈俊), Zhou Jian-Jun (周建军), Wang Gang (王刚), Zhou Wei-Ya (周维亚) Electron field emission from single-walled carbon nanotube nonwoven 2006 Chinese Physics 15 422
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