A carbon nanotube field emission cathode with high current density and long-term stability

被引：157

作者：

Calderon-Colon, Xiomara ^{[1
]}

Geng, Huaizhi ^{[2
]}

Gao, Bo ^{[2
]}

An, Lei ^{[3
]}

Cao, Guohua ^{[3
]}

Zhou, Otto ^{[1
,3
]}

机构：

[1] Univ N Carolina, Curriculum Appl Sci & Engn, Chapel Hill, NC 27599 USA

[2] Xintek Inc, Res Triangle Pk, NC USA

[3] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 32期

关键词：

FABRICATION;

D O I：

10.1088/0957-4484/20/32/325707

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Carbon nanotube (CNT) field emitters are now being evaluated for a wide range of vacuum electronic applications. However, problems including short lifetime at high current density, instability under high voltage, poor emission uniformity, and pixel-to-pixel inconsistency are still major obstacles for device applications. We developed an electrophoretic process to fabricate composite CNT films with controlled nanotube orientation and surface density, and enhanced adhesion. The cathodes have significantly enhanced macroscopic field emission current density and long-term stability under high operating voltages. The application of this CNT electron source for high-resolution x-ray imaging is demonstrated.

引用

页数：5