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

Volume

61

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

1776

Lastpage

1780

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).;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2014.2309993

Filename

6782635