Jiwen Zhao
Harbin Institute of Technology
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Publication
Featured researches published by Jiwen Zhao.
Journal of Coating Science and Technology | 2018
Jiaqi Zhu; Kaili Yao; Bing Dai; Victor Ralchenko; Guoyang Shu; Jiwen Zhao; Kang Liu; Lei Yang; Andrey Bolshakov; Jiecai Han
Hydrogen plasma etching of graphite generates radicals that can be used for diamond synthesis by chemical vapor deposition (CVD). We studied the etching of polycrystalline graphite by a hydrogen microwave plasma, growth of diamond particles of the non-seeded graphite substrates, and characterized the diamond morphology, grain size distribution, growth rate, and phase purity. The graphite substrates served simultaneously as a carbon source, this being the specific feature of the process. A disorder of the graphite surface structure reduces as the result of the etching as revealed with Raman spectroscopy. The diamond growth rate of 3 – 5 μm/h was achieved, the quality of the produced diamond grains improving with growth time due to inherently nonstationary graphite etching process. Received on 29-12-2017 Accepted on 05-03-2018 Published on 16-08-2018
Applied Physics Letters | 2018
Kang Liu; Weihua Wang; Bing Dai; Lei Yang; Jiwen Zhao; Jingjing Xue; Benjian Liu; Zhijun Lv; Minghao Bi; Guoyang Shu; Mingqi Sun; Kaili Yao; Ge Gao; Jiecai Han; Jiaqi Zhu
A UV detector based on a planar quadrant electrode structure with a 100-μm isolating cross-gap deposited on chemical vapor deposition diamond was fabricated. An asymmetrical behavior was observed for the amplitude of photocurrent when in forward and reverse bias. A linear relationship between the sum of the photocurrents at biases U and −U, and the light spot position was also observed. The aim of this study is to clarify the mechanism underlying this asymmetrical behavior and exhibit its potential application based on this behavior. A mechanism involving lowering of the contact barrier height between gold and i-diamond by carrier generation upon UV illumination was adopted to account for the photocurrent behavior and confirmed when an opposite asymmetrical photocurrent behavior was observed in other samples. In addition, position-sensitive detection performance, based on this asymmetrical photocurrent behavior, was preliminarily studied. The results exhibited the potential for application as a position-sensitive detector.
Laser Physics Letters | 2010
Y. Tian; Jiwen Zhao; Wenzhu Gao; Wei Wang; Y. Z. Wang
Sensors and Actuators A-physical | 2017
Kang Liu; Bing Dai; Victor Ralchenko; Yuanqin Xia; Baogang Quan; Jiwen Zhao; Guoyang Shu; Mingqi Sun; Ge Gao; Lei Yang; Pei Lei; Jiecai Han; Jiaqi Zhu
Journal of Crystal Growth | 2017
Guoyang Shu; Bing Dai; Victor Ralchenko; A.A. Khomich; E.E. Ashkinazi; Andrey Bolshakov; S.N. Bokova-Sirosh; Kang Liu; Jiwen Zhao; Jiecai Han; Jiaqi Zhu
Powder Technology | 2017
Kaili Yao; Bing Dai; Jiaqi Zhu; Victor Ralchenko; Guoyang Shu; Jiwen Zhao; Peng Wang; Benjian Liu; Ge Gao; Mingqi Sun; Kang Liu; Zhijun Lv; Lei Yang; Jiecai Han
Diamond and Related Materials | 2017
Bing Dai; Guoyang Shu; Victor Ralchenko; Andrey Bolshakov; Dmitry Sovyk; A. A. Khomich; V.A. Shershulin; Kang Liu; Jiwen Zhao; Ge Gao; Lei Yang; Pei Lei; Jiaqi Zhu; Jiecai Han
Thin Solid Films | 2018
Kaili Yao; Bing Dai; Lei Yang; Guoyang Shu; Jiwen Zhao; Kang Liu; Wenxin Cao; Victor Ralchenko; Jiecai Han; Jiaqi Zhu
Journal of Crystal Growth | 2018
Guoyang Shu; Bing Dai; Victor Ralchenko; Andrey Bolshakov; A.A. Khomich; E.E. Ashkinazi; V.Yu. Yurov; Kaili Yao; Kang Liu; Jiwen Zhao; Jiecai Han; Jiaqi Zhu
Diamond and Related Materials | 2018
Kaili Yao; Bing Dai; Victor Ralchenko; Guoyang Shu; Jiwen Zhao; Kang Liu; Zhenhuai Yang; Lei Yang; Jiecai Han; Jiaqi Zhu
