1. Department
of Chemistry, Sejong University, 98 Gunja-dong,
Gwangjin-gu, Seoul,
Korea 143-747
2. Department
of Chemical Engineering
and Materials Science, University of Southern California, Los Angeles, California 90089, United States
3. Department of Mechanical Engineering
and Materials Science, Rice University,
Houston, Texas 77030, United States
4. School of Advanced Materials
Engineering, Kookmin University, Jeongneung-ro
77, Seoul, Korea 136-702