1. Department of Energy Engineering
2. Hanyang University
3. Seoul 133-791, Korea
4. Photocatalysis International Research Center
5. Tokyo University of Science
6. Noda, Japan
7. Department of Materials Science and Engineering
8. Semiconductor Physics Research Center
9. School of Semiconductor and Chemical Engineering
10. Chonbuk National University
11. Jeonju 561-756, Korea