1. Department of Chemistry; Faculty of Liberal Arts and Science; Kasetsart University; Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand), Fax
2. Department of Chemistry; NANOTEC Center for Nanoscale Materials Design for Green Nanotechnology; Kasetsart University; Bangkok 10900 Thailand
3. Institute of Ion Physics and Applied Physics; University of Innsbruck; 6020 Innsbruck Austria
4. Department of Materials Science and Engineering; Vidyasirimedhi Institute of Science and Technology; Rayong 21210 Thailand