Field emission current saturation of aligned carbon nanotube - Effect of density and aspect ratio
Field emission current saturation of aligned carbon nanotube - Effect of density and aspect ratio
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DOI：
10.1063/1.2219082
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发表时间：
2006-07-15
影响因子：
3.2
通讯作者：
Rao, G. Mohan
中科院分区：
文献类型：
--
作者：
Patra, S. K.;Rao, G. Mohan
碳纳米管薄膜的场发射特性与其密度和长径比有很强的相关性。Fowler-Nordheim（F-N）图中的非线性已被解释为在FE期间由于加热而导致的碳的功函数变化。F-N图中的特征拐点将线性区域与非线性区域分开。I-knee值是定义有限元过程的基本参数。结果表明，最佳的纳米管密度和长度具有较高的场发射效率。解释了短纳米管场致发射的现象。(c)2006年，美国物理学会。
The investigation of field emission (FE) properties of carbon nanotube film reveals a strong dependency on the density and its aspect ratio. Nonlinearity in the Fowler-Nordheim (F-N) plot has been explained in terms of change in work function of carbon due to heating during FE. A characteristic knee in the F-N plot, separates the linear region from the nonlinear region. I-knee value turns out to be a basic parameter to define the FE process. It has been shown that an optimum density and length of the nanotubes have high efficiency of field emission. An explanation has been given for the phenomena responsible for efficient field emission in short nanotubes. (c) 2006 American Institute of Physics.