1. The Graduate School in Chiang Mai University (GSCMU), Chiang Mai University, Chiang Mai 50200, Thailand
2. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
3. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
4. Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand