Bulk graphene/multi-walled carbon nanotubes based field emitters

被引：9
|
作者：
Ji, Qianyu [1 ,2 ]
Wang, Bowen [3 ]
Zheng, Yajuan [4 ]
Yan, Xueping [5 ]
Zeng, Fanguang [4 ]
Lu, Bingheng [3 ]
机构：
[1] Xi An Jiao Tong Univ, Fac Elect & Informat Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Microelect, Xian 710049, Peoples R China
[3] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
[4] Zhengzhou Univ Aeronaut, Sch Mat Sci & Engn, Zhengzhou 450046, Peoples R China
[5] Natl Innovat Inst Addit Mfg, 997 Shanglinyuan 8th Rd, Xian 710300, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 897卷
基金：
中国国家自然科学基金;
关键词：
Bulk graphene/carbon nanotubes; Cold pressing; Field emission; EMISSION CHARACTERISTICS; NANOPARTICLES;
D O I：
10.1016/j.jallcom.2021.163136
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Graphene and carbon nanotubes are excellent field emission materials. However, film-based emitters were easily damaged with poor long-time stability. Here, for the first time, we developed the bulk graphene/carbon nanotubes hybrid materials for field emission applications. The bulk material was synthesized by a quick and easy method of cold-pressing. The effects of pressure and the carbon nanotubes content on the field emission performance were quantitatively studied. The novel bulk emitters exhibited an excellent field emission performance achieving the maximum current density of 364.47 mA/cm(2) at 3.73 V/mu m. Besides, a stable emission of 219.34 mA/cm(2) was obtained continuously for over 36 h. Hence, the bulk emitters can be used in high-power cold cathode applications, such as 3D printing, electron beam welding and electron beam melting. (C) 2021 Published by Elsevier B.V.
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页数：7
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