1. Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea
2. CRD Research Institute, LG Chemical Corporation, 104-1 Munji-dong, Yuseong-gu, Daejeon, 305-380, Republic of Korea