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High-Current-Density Edge Electron Emission and Electron Beam Shaping for Vacuum Electronics Using Flexible Graphene Paper

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5 Author(s)
Jianlong Liu ; Nat. Key Lab. for Vacuum Electron. Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China ; Baoqing Zeng ; Yun Yang ; Nannan Li
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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.

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Electron Devices, IEEE Transactions on  (Volume:61 ,  Issue: 6 )