碳纳米管阴极场致发射的电场数值模拟  

Electrical Numerical Simulation of Field Emission for Carbon Nanotube Cathode

作　　者：李玉魁[1] 成胜利[1] 刘兴辉[2] 刘一婷[2] 朱长纯[3] 

机构地区：[1]中原工学院电子信息学院,郑州450007 [2]辽宁大学物理系,辽宁沈阳110036 [3]西安交通大学电子信息与工程学院,西安710049

出　　处：《辽宁大学学报（自然科学版）》2006年第2期168-171,共4页Journal of Liaoning University：Natural Sciences Edition

基　　金：国家自然科学基金重点项目(60036010);863基金(2001AA313090)资助项目;教育部博士点重点基金项目(2000069823).

摘　　要：利用VisualFORTRAN语言,对碳纳米管阴极的外电势分布和电场强度分布进行了数值模拟.采用非等间距的网格划分对碳纳米管尖端附近进行细致的划分处理,并利用等参有限元方法进行了模拟计算.分析了碳纳米管尖端局部电场强度的增强效应和相邻碳纳米管之间的电场屏蔽现象.讨论了碳纳米管电场强度随管间距变化的关系以及碳纳米管尖端电场强度随半径变化的关系.The numerical simulation was carried out for the electric potential and clectric field intensity distribution of the carbon nanotube cathode by using Visual FORTRAN language. The finite element method was adopted in the course of numerical simulation, and the non - uniform spacing mesh division method was used to process the area near the carbon nanotube tip. For the calculation result, the enhancement effect of electric field intensity at the carbon nanotube tip and the field - screening phenomena between carbon nanotubes tip were analyzed. The characteristics of tube spacing and tube radius for electric field intensity of carbon nanotube were also discussed. 1

关 键 词：碳纳米管 场致发射 数值模拟 电场强度 

分 类 号：TB303[一般工业技术—材料科学与工程]