Electron field emission from sp2-induced insulating to metallic behaviour of amorphous carbon (a-C) films

被引：0
|
作者：
Pitamber Mahanandia
P. N. Viswakarma
Prasad Vishnu Bhotla
S. V. Subramanyam
Karuna Kar Nanda
机构：
[1] Indian Institute of Science,Department of Physics
[2] Indian Institute of Science,Department of Materials Research Centre
来源：
Bulletin of Materials Science | 2010年 / 33卷
关键词：
Amorphous carbon; transport; field emission;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The influence of concentration and size of sp2 cluster on the transport properties and electron field emissions of amorphous carbon films have been investigated. The observed insulating to metallic behaviour from reduced activation energy derived from transport measurement and threshold field for electron emission of a-C films can be explained in terms of improvements in the connectivity between sp2 clusters. The connectivity is resulted by the cluster concentration and size. The concentration and size of sp2 content cluster is regulated by the coalescence of carbon globules into clusters, which evolves with deposition conditions.
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页码：215 / 220
页数：5
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