Effect of length and spacing of vertically aligned carbon nanotubes on field emission properties
Effect of length and spacing of vertically aligned carbon nanotubes on field emission properties
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DOI：
10.1063/1.1576310
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发表时间：
2003-05-19
影响因子：
4
通讯作者：
Ren, ZF
中科院分区：
文献类型：
--
作者：
Jo, SH;Tu, Y;Ren, ZF
碳纳米管（CNT）膜的长度和间距独立地变化，以研究其对通过等离子体增强热灯丝化学气相沉积使用脉冲电流电化学沉积的催化剂颗粒生长的垂直排列的CNT膜的场发射特性的影响。结果表明，一般情况下，宏观电场E-mac，E-1，定义为当发射电流密度达到1 mA/cm（2）时的电场，可以通过增加碳纳米管的长度和间距来降低。然而，对于非常高密度的CNT膜，长度的增加略微增加了E-mac，E-1，而对于非常短的CNT膜，间距的增加并没有有效地减少E-mac，E-1。(C)2003年，美国物理学会。
The length and the spacing of carbon nanotube (CNT) films are varied independently to investigate their effect on the field-emission characteristics of the vertically aligned CNT films grown by plasma-enhanced hot filament chemical vapor deposition using pulsed-current electrochemically deposited catalyst particles. It is shown that, in general, the macroscopic electric field E-mac,E-1, defined as the electric field when the emission current density reaches 1 mA/cm(2), can be reduced by increasing the length and the spacing of CNTs. However, for the very-high-density CNT films, the increase of length increases E-mac,E-1 slightly, whereas for the very short CNT films, the increase of spacing does not effectively reduce E-mac,E-1. (C) 2003 American Institute of Physics.