1. School of Energy and Environment City University of Hong Kong Tat Chee Avenue Kowloon Tong Hong Kong HKG China
2. Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong HKG China
3. Department of Physics City University of Hong Kong Tat Chee Avenue, Kowloon Tong Hong Kong HKG China