Title :
High-Current-Density Edge Electron Emission and Electron Beam Shaping for Vacuum Electronics Using Flexible Graphene Paper
Author :
Jianlong Liu ; Baoqing Zeng ; Yun Yang ; Nannan Li ; Jing Guo
Author_Institution :
Nat. Key Lab. for Vacuum Electron. Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
We demonstrate edge electron emission from flexible free-standing graphene paper (GP). The turn-on field is measured at 2.2 V/μm, and the maximum emission current density at 3 A/cm2. The field emission properties of GP can be optimized by adjusting the thickness and annealing temperature. Because it is flexible, it can be shaped into different forms to meet the requirements of specific applications. The electron beam shape can range from a sheet electron beam to a cylindrical (hollow) electron beam.
Keywords :
annealing; current density; electron beams; electron emission; graphene; paper; C; annealing temperature; cylindrical hollow electron beam; edge electron emission; electron beam shaping; emission current density; field emission properties; flexible free-standing graphene paper; flexible graphene paper; high-current-density; vacuum electronics; Annealing; Current density; Educational institutions; Electron beams; Electron emission; Graphene; Temperature measurement; Edge emitter; field emission; flexible electron beam; graphene paper (GP); graphene paper (GP).;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2014.2309993
