Affiliations
School of Materials Science and Innovation, Faculty of Science, Mahidol University, Nakhon Pathom, 73170, Thailand; Department of Physics, Faculty of Science, Mahidol University, 272 Rama VI Road, Bangkok, 10400, Thailand; Research Network of NANOTEC at Mahidol University, National Nanotechnology Center, Pathum Thani, 10400, Thailand; Thai Carbon & Graphite Co., Ltd., 15/2 Phutthamonthon Sai IV Road74130, Thailand