摘要
基于金属尖端场致电子发射理论,建立了碳纳米管发光管场致电子发射模型.利用高温热解酞菁铁的方法,在几种不同金属丝上生长了碳纳米管,测试比较了几种金属丝上碳纳米管的场致电子发射特性.结果表明,钨丝上生长的碳纳米管场发射特性最好,开启电场低于其他金属丝上生长的碳钠米阴极,且发射电流密度大于其他金属丝上碳钠米管发射阴极.
Basis on the theory of field-emission from metallic tip, the model of electric field in emission of carbon nanotubes （CNT）on metallic wire is established. The catalyst iron particles and carbon atom are introduced onto the substrate by high temperature pyrolysis of FePc. Carbon nanotubes directly grown on some kinds of metallic wires. The characteristics of CNT for field- emission cathodes were measured in different meta[lic wires under 10^-6 pa pressure. The field- emission characteristics of CNT grown on every metallic wire was measured and comparised. The results show that the Tungsten wire on the growth of carbon nanotube field emission characteristics of the best, opening the electric field is lower than other metal wire on the cathode, and the launch of the current density is stronger than other metal wire on the emission of carbon nanotubes.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第5期32-34,共3页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(60844006)
陕西省自然科学基金资助项目(ZK2007F46)
关键词
场致发射模型
高温热解
金属丝
碳纳米管
model of field-emission
high temperature pyrolysis
metallic wire
carbon nanotubes
