1. Department of Chemical & Biomolecular Engineering (BK21 program), KAIST, Daejeon 305-701, Korea
2. Department of Chemical Engineering, College of Engineering, Kyung Hee University, 1 Seochon-dong, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Korea
3. BioProcess Engineering Research Center, Center for Systems & Synthetic Biotechnology, and Institute for the BioCentury, KAIST, Daejeon 305-701, Korea
4. Center for Energy Materials Research, Korea Institute of Science and Technology, P.O. Box 131 Cheongryang, Seoul 130-650, Korea
5. Department of Electrical Engineering and Computer Sciences, and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139