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
2. Beijing 100081
3. P. R. China
4. Laser Micro-/Nano-Fabrication Laboratory, Beijing Institute of Technology
5. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of P. R. China, State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University
6. Beijing 100084