1. Graduate School of Advanced Science and Technology, Energy and Environment Area, Japan Advanced Institute of Science and Technology(JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
2. School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (SIIT), Thammasat University, P.O. Box 22, Pathum Thani 12121, Thailand