Electron field emission from single-walled carbon nanotube nonwoven |
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Authors: | Song Li Liu Shuang Zhang Geng-Min Liu Li-Feng Ma Wen-Jun Liu Dong-Fang Zhao Xiao-Wei Luo Shu-Dong Zhang Zeng-Xing Xiang Yan-Juan Shen Jun Zhou Jian-Jun Wang Gang and Zhou Wei-Ya |
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Affiliation: | 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; Department of Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China |
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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. |
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Keywords: | single-walled carbon nanotubes field |
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