中国物理B ›› 2006, Vol. 15 ›› Issue (2): 422-427.doi: 10.1088/1009-1963/15/2/031

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Electron field emission from single-walled carbon nanotube nonwoven

刘双1, 罗述东1, 沈俊1, 周建军1, 王刚1, 周维亚1, 宋礼2, 刘利峰2, 马文君2, 刘东方2, 赵小伟2, 张增星2, 向彦娟2, 张耿民3   

  1. (1)Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; (2)Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; (3)Department of Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
  • 收稿日期:2005-09-09 修回日期:2005-09-14 出版日期:2006-02-20 发布日期:2006-02-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10334060 and 50572119) and ``973'' National Basic Research Project (Grant No 2005CB623602).

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   

  1. 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
  • Received:2005-09-09 Revised:2005-09-14 Online:2006-02-20 Published:2006-02-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10334060 and 50572119) and ``973'' National Basic Research Project (Grant No 2005CB623602).

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摘要： 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.

关键词: single-walled carbon nanotubes, field

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.

Key words: single-walled carbon nanotubes, field

中图分类号:  (Field emission, ionization, evaporation, and desorption)

  • 79.70.+q
61.46.Fg (Nanotubes)