1. CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
2. Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, P. R. China
3. Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, École Polytechnique Fedérale de Lausanne, 1951 Sion, Switzerland
4. University of Chinese Academy of Sciences, Beijing 100049, P. R. China