1. Department
of Physics, The Hong Kong University of Science and Technology, Hong Kong, China
2. Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong, China
3. Department
of Chemistry, The Hong Kong University of Science and Technology, Hong Kong, China
4. Department
of Physics, South University of Science and Technology of China, Nanshan District, Shenzhen, Guangdong 518055, China
5. Shanghai
Key Laboratory of Functional Materials Chemistry and Institute of
Fine Chemicals, East China University of Science and Technology, Meilong Road 130, Shanghai, China