Affiliation: | 1. Department of Chemistry and HKU‐CAS Joint Laboratory on New Materials, The University of Hong Kong, Pokfulam Road (Hong Kong), Fax: (+852)?2857‐1586;2. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong);3. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking, 100080 (China), Fax: (+86)?10‐6255‐4670 |