1. HKUST-Shenzhen
Research Institute, No. 9 Yuexing 1st RD, South Area,
Hi-tech Park, Nanshan, Shenzhen 518057, P. R. China
2. Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Division of Life Science, Institute of Advanced Study and Division of Biomedicine Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China
3. Chemistry Department, Loughborough University, Loughborough, Leicestershire LE11 3TU, U.K.
4. NSFC Center for luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China