Prof.
Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002; Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, THAILAND 40002; Nanotec-KKU Center of Excellence on Advanced Nanomaterials for Energy Production and Storage, Khon Kaen University, Khon Kaen, THAILAND 40002