1. Electrochemistry and Optical Spectroscopy Center of Excellence, Department of Chemistry, Faculty of ScienceChulalongkorn University Patumwan, Bangkok 10330 Thailand
2. The Institute of Biotechnology and Genetic EngineeringChulalongkorn University Patumwan, Bangkok 10330 Thailand
3. Department of Chemistry, Faculty of ScienceSrinakharinwirot University Sukhumvit 23 Bangkok 10110 Thailand
4. Center of Excellence on Petrochemical and Materials TechnologyChulalongkorn University 254 Phayathai Road Pathumwan, Bangkok 10330 Thailand