1. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai50200, Thailand
2. Environmental Science Research Center (ESRC), Chiang Mai University, Chiang Mai50200, Thailand
3. Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok10900, Thailand
4. Department of Polymer Engineering, University of Akron, Akron, Ohio44325-0301, United States