Xuewen He,1,2,3 Jacky W.Y. Lam,1,3 Ryan T.K. Kwok,1,3 and Ben Zhong Tang1,2,3,4,5

1Department of Chemistry, The Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration and Reconstruction, Institute for Advanced Study, Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China; email: [email protected], [email protected]

2Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China

3HKUST-Shenzhen Research Institute, Shenzhen 518057, China

4Center for Aggregation-Induced Emission, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China

5AIE Institute, Guangzhou Development Distinct, Huangpu, Guangzhou 516530, China