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Structural phase transformation in ZnS nanocrystalline thin films by swift heavy ion irradiation
Authors:Shiv P Patel  AK Chawla  Ramesh Chandra  Jai Prakash  PK Kulriya  JC Pivin  D Kanjilal  Lokendra Kumar
Institution:1. Department of Physics, Faculty of Science, University of Allahabad, Allahabad-211002, India;2. Nanoscience Laboratory, IIC, Indian Institute of Technology, Roorkee-247667, India;3. Department of Chemistry, M.M.H. (P.G.) College, Ghaziabad-201001, India;4. Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi-110067, India;5. CSNSM, IN2P3-CNRS, Batiment 108, F-91405 Orsay Campus, France;1. Supercritical Fluids and Nano Processes Laboratory, School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Republic of Korea;2. Department of Applied Microbiology, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Republic of Korea;1. Science and Technology on Materials Performance Evaluation in Space Environment Laboratory, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Liaoning Zhongwang Group Co. Ltd., Liaoyang 111003, China;3. School of Public Health, Mudanjiang Medical University, Mudanjiang 157011, China;4. State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;1. Aix-Marseille Université, Université de Toulon, CNRS, IM2NP, UMR 7334, 13397 Marseille, France;2. Université de Toulon, CNRS, IM2NP, UMR 7334, 83957 La Garde, France;1. Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;2. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 101408, China;3. School of Physics, Peking University, Beijing 100871, China;4. School of Environment and Safety Engineering, North university of China, Taiyuan 030051, China
Abstract:Zinc sulfide (ZnS) thin films in zinc-blende (ZB) and wurtzite (W) phases have been fabricated by pulsed laser deposition. 150 MeV Ni ion beam irradiation has been carried out at different fluences ranging from 1011 to 1013 ions/cm2 at room temperature for ion induced modifications. Structural phase transformation in ZnS from W to ZB phase is observed after high energy ion irradiation which leads to the decrease in bandgap. Generation of high pressure and temperature by thermal spike during MeV ion irradiation along the ion trajectory in the films is responsible for the structural phase transformation.
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