High-Current-Density field emission from self-heating printed carbon nanotubes. Issue 4 (2nd April 2016)

• Record Type: Journal Article
• Authors: Wang, Qilong; Yu, Cairu; Di, Yusong; Zhu, Zhuoya; Zhang, Xiaobing; Li, Chen; Lei, Wei
• Is Part Of: Fullerenes, nanotubes and carbon nanostructures. Volume 24:Issue 4(2016)
• Page Start: 273
• Page End: 277
• Publication Date: 2016-04-02
• Subjects: Field emission -- Self heating -- Printed carbon nanotube -- Vacuum device; Fullerenes -- Periodicals; Nanotubes -- Periodicals; Nanostructures -- Periodicals; 546.6812
• DOI: 10.1080/1536383X.2016.1152470
• Languages: English
• ISSNs: 1536-383X

Abstract

ABSTRACT: High-current-density field emitters are considered as the potential and necessary components for compact high definition x-ray sources and high-power cold cathode microwave amplifiers. In this report, high-current-density field emission from self-heating printed carbon nanotubes is introduced. Large emission current causes large heat that increases the temperature of the emitters. The temperature is estimated to be more than ~1600 K. Localized surface field and high temperature both drive more electrons escaping from the emitters, and the maximum current density is larger than ~2.7 A/cm 2 that will satisfy the need of most vacuum electron devices including x-ray sources and microwave electron devices.