1. Department of Chemistry, Institute of Molecular Functional Materials
2. HKUST Fok Ying Tung Research Institute, Nansha, Guangzhou, China
3. Department of Physics, The Hong Kong University of Science & Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China
4. Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
5. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China