1. College of Chemistry, Chemical Engineering and Materials
Science, Soochow University, Suzhou, Jiangsu 215123, China
2. Department
of Physics and Interdisciplinary Program of Biomedical Engineering, Pukyong National University, Busan 608-737, Republic of Korea
3. LED-Marin Convergence Technology R&BD Center, Pukyong National University, Busan 608-739, Republic of Korea