Electron field emission from single-walled carbon nanotube nonwoven

被引：10
|
作者：
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China [1 ]
不详 [2 ]
不详 [3 ]
机构：
来源：
Chin. Phys. | 2006年 / 2卷 / 422-427期
关键词：
Amplification - Carbon nanotubes - Current density - Electric fields - Vacuum;
D O I：
10.1088/1009-1963/15/2/031
中图分类号：
学科分类号：
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/μm is required to reach an emission current density of 10 μA/cm2. An emission current density of 10 mA/cm2 is obtained at an operating electric field of 1.88 V/μm. 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/μm, 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. © 2006 Chin. Phys. Soc. and IOP Publishing Ltd.
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