1. Department
of Materials Science and Engineering, Research Institute of Advanced
Materials (RIAM), Seoul National University, Gwanak-ro 599,
Gwanak-gu, Seoul 151-742, Republic of Korea
2. Center
for Nanoparticle Research, Institute for Basic Science (IBS), Seoul National University, Gwanak-ro 599, Gwanak-gu, Seoul 151-742, Republic of Korea
3. Materials
and Process Simulation Center (MC 139-74), California Institute of Technology, 12000 East California Boulevard, Pasadena, California 91125, United States
4. Faculty
of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea
5. Department
of Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea