1. CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 35002 China
2. Laboratory of Advanced Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen 361021 China
3. University of Chinese Academy of Science Beijing 100049 China
4. Natural Sciences and Science Education National Institute of Education Nanyang Technological University Singapore Singapore 637616 Singapore