1. Nano Science and Technology Program; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong
2. Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong
3. Department of Physics; Hong Kong Baptist University; Kowloon Hong Kong
4. Department of Physics; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong