1. a Materials Science Program, Faculty of Science , Maejo University , Chiang Mai , 50290 , Thailand
2. b College of Nanotechnology , King Mongkut's Institute of Technology Ladkrabang , Bangkok , 10520 , Thailand
3. c Key Laboratory of Inorganic Functional Materials and Integrated Devices , Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai , 200050 , China
4. d School of Physics, Institute of Science , Suranaree University of Technology and NANOTECH-SUT Center of Excellence on Advanced Functional Nanomaterials , Nakhon Ratchasima , 30000 , Thailand
5. e Department of Physics and Materials Science, Faculty of Science , Chiang Mai University , Chiang Mai , 50200 , Thailand