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Thermal shock induced nanocrack as high efficiency surface conduction electron emitter
Authors:Bangdao ChenHongzhong Liu  Hongtao WangFan Fan  Li WangYucheng Ding  Bingheng Lu
Affiliation:a State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, China
b Institute of Applied Mechanics, Zhejiang University, Hangzhou 310027, China
Abstract:Significant emission current enhancement has been achieved for surface conduction electron emitter, due to the special three-dimensional nanocrack structure fabricated by the thermal shock process. The three-dimensional configuration strongly changed the electric field distribution and controlled the emission electron trajectory. Thermal shock treatment was also used to increase the edge roughness of the nanocrack and thereby dramatically improved the field emission characteristics. Stable and uniform electron emission was observed with turn-on voltage of 150 V. The surface conduction current of 400 μA for 6 cells was obtained with the detector voltage of 1 kV and the gap voltage of 170 V.
Keywords:Thermal shock   Nanocrack   Surface conduction electron emitter
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