Stable Electron Field Emission from PMMA-CNT Matrices

被引：55
作者：
Pandey, Archana [1 ]
Prasad, Abhishek [1 ]
Moscatello, Jason P. [1 ]
Yap, Yoke Khin [1 ]
机构：
[1] Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA
来源：
ACS NANO | 2010年 / 4卷 / 11期
关键词：
carbon nanotubes; field emission; stability; Joule heating; screening effect; CARBON NANOTUBES;
D O I：
10.1021/nn100925g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We have created PMMA-CNT matrices by embedding opened tip vertically aligned multiwalled carbon nanotubes (VA MWCNTs) with poly(methyl methacrylate) (PMMA) These PMMA-CNT matrices are excellent electron field emitters with an emission threshold field of 1 675 V/mu m, more than 2 fold lower that that of the as grown sample In addition, the emission site density from these matrices is high, merely filling up the entire sample surface Emission stability test at similar to 135 mA/cm(2) was performed continuously for 40 h with no significant degradation On the basis of our theoretical simulation and hypothetical modeling, we attribute these performances to the reduced screening effect and fewer Joule heatings due to the shorter effective transport distance of the electrons in MWCNTs
引用
收藏
页码：6760 / 6766
页数：7
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