1. State key laboratory of Modern Optical Instrumentation; Zhejiang University; Hangzhou 310027 China
2. Nanotechnology Center; Institute of Textiles and Clothing; The Hong Kong Polytechnic University; Hong Kong SAR China
3. Advanced Research Centre for Fashion and Textiles; The Hong Kong Polytechnic University Shenzhen Research Institute; Shenzhen 518000 China
4. Department of Applied Physics; The Hong Kong Polytechnic University; Hong Kong SAR China