1. Department of Chemistry Faculty of Science Srinakharinwirot University Sukhumvit 23, Wattana Bangkok 10110 Thailand
2. Electrochemistry and Optical Spectroscopy Research Unit (EOSRU) Department of Chemistry Faculty of Science Chulalongkorn University 254 Phayathai Road, Patumwan Bangkok 10330 Thailand
3. The Institute of Biotechnology and Genetic Engineering Chulalongkorn University 254 Phayathai Road, Patumwan Bangkok 10330 Thailand