1. Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand
2. Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand
3. Department of Physics, Faculty of Science, King Mongkut's Institute of Technology, Ladkrabang, Bangkok 10520, Thailand