1. Faculty of Science and Technology, Pibulsongkram Rajabhat University, Phitsanulok, Thailand;
2. Faculty of Liberal Arts and Science, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom, Thailand;
3. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai, and ThEP Center, CHE, Bangkok, Thailand