1. Center of Super-Diamond and Advanced Films (COSDAF); Department of Chemistry; City University of Hong Kong; 83 Tat Chee Avenue, Kowloon Hong Kong SAR China
2. Jiangsu Key Laboratory of Biofunctional Molecule; College of Life Sciences and Chemistry; Jiangsu Second Normal University; Nanjing 210013 China
3. Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong P. R. China