1. Department of Chemistry, City University of Hong Kong, Hong Kong
2. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
3. Tsing Hua Interdisciplinary Program, National Tsing Hua University, Hsinchu 300, Taiwan
4. Department and Graduate Institute of Physics, National Changhua University of Education, Changhua 500, Taiwan
5. Department of Applied Science, School of Science and Technology, Hong Kong Metropolitan University, Hong Kong
6. Department of Chemistry, Soonchunhyang University, Asan 31538, Korea
7. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
8. City University of Hong Kong Chengdu Research Institute, Chengdu, China