1. Department of Applied Physics The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong P. R. China
2. Department of Chemistry Hong Kong Baptist University Kowloon Tong, Kowloon Hong Kong P. R. China
3. School of Fashion and Textiles The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong P. R. China
4. Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong P. R. China
5. Research Institute of Intelligent Wearable Systems The Hong Kong Polytechnic University Hung Hom, Kowloon Hong Kong P. R. China