1. College of Physics and Optoelectronics, Key Laboratory of Interface Science and Engineering in Advanced Materials, Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
2. Chemical Physics Division and NanoLund, Lund University, Box 124, Lund 22100, Sweden
3. Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030006, China