Field emission behavior study of multiwalled carbon nanotube yarn under the influence of adsorbents

被引：16
作者：
Liu, Peng [1 ]
Jiang, Kaili [1 ]
Wei, Yang [1 ]
Liu, Kai [1 ]
Liu, Liang [1 ]
Fan, Shoushan [1 ]
机构：
[1] Tsinghua Univ, Dept Phys, Tsinghua Foxconn Nanotechnol Res Ctr, Beijing 100084, Peoples R China
来源：
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2010年 / 28卷 / 04期
基金：
中国博士后科学基金;
关键词：
LARGE-AREA; EMITTERS; ADSORPTION; ARRAYS; DISPLAY; FILM; O-2; TIP;
D O I：
10.1116/1.3449188
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The authors have studied the field emission (FE) behavior of multiwalled carbon nanotube (MWCNT) yarn at different temperatures. By analyzing how the FE characteristics change with temperature and the residual gas spectra of the vacuum chamber, it was concluded that the intrinsic FE of MWCNTs follows the Fowler-Nordheim theory fairly well, and the deviation from the theory at low temperature (below similar to 700 K) is caused by the influence of adsorption. Water is deduced to be the dominant species that influences the FE. It was found that the adsorbents can be desorbed at high voltage due to the Joule heating of the FE current. The adsorption was deduced to be physical from the value of the desorption temperature. The FE current recovery time at different pressures shows that monolayer adsorption is enough to cause obvious FE current changes. (C) 2010 American Vacuum Society. [DOI: 10.1116/1.3449188]
引用
收藏
页码：736 / 739
页数：4
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