1. Department of Chemical Engineering; Center of Excellence on Petrochemical and Materials Technology; Faculty of Engineering; Kasetsart University; 50 Phaholyothin Rd. Jatujak, Bangkok 10900 Thailand
2. Center for Advanced Studies in Nanotechnology and Its Applications in Chemical; Food and Agricultural Industries; Kasetsart University; Bangkok 10900 Thailand
3. Department of Chemical and Materials Engineering; University of Alberta; 9107-116 Street Edmonton Alberta T6G 2V4 Canada