1. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
2. Industrial Chemistry Innovation Program, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand
3. Department of Primary Industries and Mines, Ministry of Industry, Bangkok 10400, Thailand
4. Electron Microscope Research and Service Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand