1. Department of Chemistry and Center of Excellence for Innovation in Chemistry; Faculty of Science; Burapha University; Chonburi 20131 Thailand
2. Department of Fundamental Science and Physical Education; Faculty of Science at Siracha; Kasetsart University; Chonburi 20230 Thailand
3. Department of Electrical Engineering; Faculty of Engineering; King Mongkut's Institute of Technology Ladkrabang; Bangkok 10520 Thailand