1. Department of Physics and William Mong Institute of Nano Science and Technology The Hong Kong University of Science and Technology (HKUST) Clear Water Bay Kowloon Hong Kong P. R. China
2. Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong P. R. China
3. Department of Physics and Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong P. R. China
4. Department of Mechanical Engineering The University of Hong Kong Pokfulam Road Hong Kong P. R. China