Numerical study on the field emission properties of aligned carbon nanotubes using the hybrid field enhancement scheme

被引：0
|
作者：
D. Kim
J.E. Bourée
S.Y. Kim
机构：
[1] Ecole Polytechnique,Laboratoire de Physique des Interfaces et des Couches Minces
[2] Ajou University,Department of Molecular Science and Technology
来源：
Applied Physics A | 2006年 / 83卷
关键词：
Enhancement Factor; Maximum Current Density; Emission Current Density; Aligned Carbon Nanotubes; Electrostatic Force Microscopy;
D O I：
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中图分类号：
学科分类号：
摘要：
The magnitude of the local electric field and the electron emission current density for an array of aligned carbon nanotubes is estimated. For describing in detail the properties of the local electric field in the vicinity of the nanotube tips, a hybrid method allowing for the local determination of the field enhancement factor is introduced. The field factor consists of two parts: an internal factor which describes the structure of the carbon nanotubes and an external factor which represents the field screening effect due to neighboring nanotubes. The current density is obtained using the Fowler–Nordheim equation with the hybrid field enhancement scheme. As a result, the emission properties for an array of nanotubes with a given length are described satisfactorily, and an optimum value for the nanotube spacing is determined.
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页码：111 / 114
页数：3
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