Dynamic control of local field emission current from carbon nanowalls

被引：5

作者：

Wang, Ying ^{[1
]}

Yang, Yumeng ^{[1
]}

Wu, Yihong ^{[1
]}

机构：

[1] Natl Univ Singapore, Dept Elect & Comp Engn, Informat Storage Mat Lab, Singapore 117583, Singapore

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2014年 / 32卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

FABRICATION; FILMS; GROWTH;

D O I：

10.1116/1.4893540

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 report on a systematic study of modulation of the field emission current from carbon nanowalls using a sharp probe as the anode in an ultrahigh vacuum system. Modulation of the local emission current was achieved by either varying the anode-cathode distance (d) with the aid of an AC magnetic field or superimposing a small AC bias on a DC bias during the field emission measurement. Current modulation ratio of over two orders of magnitude was achieved with the modulation becoming more efficient at a smaller d. The experimental results are discussed using the Fowler-Nordheim theory in combination with a simple cantilever model to account for the modulation effect. The experimental results demonstrated good static stability and dynamic controllability of local field emission current from the carbon nanowalls. (C) 2014 American Vacuum Society.

引用

页数：9

共 39 条

[11] An improved lamellae drop-off technique for sharp tip preparation in scanning tunneling microscopy [J].