Affiliation: | 1. Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand 2. Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand 3. Nanotec-KKU Center of Excellence on Advanced Nanomaterials for Energy Production and Storage, Khon Kaen University, Khon Kaen, 40002, Thailand 4. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
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