Appearance of a knee on the Fowler-Nordheim plot of carbon nanotubes on a substrate

被引：23
|
作者：
Zhang, JH [1 ]
Yang, CR
Yang, WW
Feng, T
Wang, X
Liu, XH
机构：
[1] Univ Elect Sci & Technol China, Inst Microelect & Solid State Elect, Chengdu 610054, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2006年 / 138卷 / 01期
关键词：
carbon nanotubes; thin film; field emission; electronic band structure;
D O I：
10.1016/j.ssc.2006.01.046
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Existing theories for electron-field emission of carbon nanotubes (CNTs) cannot interpret why there appears in certain cases a knee on some Fowler-Nordheim (F-N) plots while not on others. We consider the interaction between substrate and CNTs and introduce a double-barrier model to explain the knee on the F-N plot. The knee on the F-N plot is a consequence of the transition from direct tunneling to F-N tunneling. The absence of the knee for the CNT films on titanium is attributed to the removal of the interface barrier by the formation of a conductive titanium carbide interlayer. The double-barrier model is helpful in understanding the field emission mechanism of CNTs and can explain the experimental results regardless whether or not there is a knee on F-N plot. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：13 / 16
页数：4
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