1. Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
2. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of People’s Republic of China; State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
3. Department of Chemistry, Tsinghua University, Beijing 100081, People’s Republic of China