Affiliation: | 1. Department of Chemistry, Seoul National University, Seoul 151‐747 (Korea), Fax: (+82)?887‐4354, http://www.niel.or.kr/;2. Interdisciplinary Program, Bioengineering Major, Seoul National University, Seoul 110‐744 (Korea);3. Department of Biomedical Engineering, College of Medicine and Institute of Medical and Biological Engineering, Medical Research Center, Seoul National University, Seoul 110‐744 (Korea) |