Improvement of the field emission of carbon nanotubes by hafnium coating and annealing

被引：43
作者：
Zhang, JH [1 ]
Yang, CR
Wang, YJ
Feng, T
Yu, WD
Jiang, J
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：
NANOTECHNOLOGY | 2006年 / 17卷 / 01期
关键词：
D O I：
10.1088/0957-4484/17/1/043
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Despite the promising field emission properties, as-grown carbon nanotubes (CNTs) are far from perfect and need improvement. We report on the field electron emission properties of hafnium coated CNTs. The result shows hafnium carbide (HfC) can be formed on the surface of CNT films at an annealing temperature of 1200 degrees C. This treatment improves the field emission current density, emission uniformity and emission stability of CNT films. The improvement of field emission by Hf coating on the CNT surface benefits from the formation of HfC, which is conductive, inert, robust and of low work function. This approach may provide an effective method for the modification of the field emission of CNTs.
引用
收藏
页码：257 / 260
页数：4
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