1. Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University 1 , Shantou, Guangdong 515063, People’s Republic of China
2. Chemistry and Chemical Engineering Guangdong Laboratory 2 , Shantou 515063, People’s Republic of China
3. Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong 3 , Tat Chee Avenue, Kowloon, Hong Kong, China