1. Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong 999077 China
2. Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Industrial Technology Chinese Academy of Sciences Ningbo Zhejiang 315201 China
3. National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou University Zhengzhou Henan 450002 China
4. Centre for Functional Photonics City University of Hong Kong Kowloon Hong Kong 999077 China