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

被引：11

作者：

Kim, D

Bourée, JE

Kim, SY

机构：

[1] Ecole Polytech, CNRS, UMR 7647, Phys Interfaces & Couches Minces Lab, F-91128 Palaiseau, France

[2] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2006年 / 83卷 / 01期

关键词：

D O I：

10.1007/s00339-005-3465-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：111 / 114

页数：4

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