Improve the field emission uniformity of carbon nanotubes treated by ball-milling process
- 作者：Zhejuan Zhang ; Z. Sun ; Yiwei Chen
- 关键词：Flat panel display ; Carbon nanotubes ; Ball milling ; Field emission property
- 刊名：Applied Surface Science
- 出版年：2007
- 期刊代码：6_01694332
- 类别：ms
- 出版时间：15 January 2007
- 卷：253
- 期：6
- 页码：3292-3297
- 文件大小：798 K
摘要
Carbon nanotubes (CNTs) deposited by chemical vapor deposition (CVD) were treated by ball milling. The morphologies and field emission properties of the treated CNTs depending on milling time were studied. The emission turn-on field is increased, and the field emission current density is reduced, when the milling time increased from 0.5 to 3 h. The as-deposited long CNTs were cut to short CNTs (1 h) and micro-particles (>1 h) with increasing of the milling time. It is found that the optimized milling time is 0.5–1 h, the treated CNTs showed excellent field emission properties, such as low turn-on field, high emission current density and uniform luminescence spots distribution.