1. National Laboratory of Solid State Microstructures; Department of Physics; Nanjing University; 22 Hankou Road Nanjing Jiangsu 210093 P. R. China
2. Jiangsu Engineering Technology Research Centre of Environmental Cleaning Materials; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control; Jiangsu Joint Laboratory of Atmospheric Pollution Control; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology; School of Environmental Science and Engineering; Nanjing University of Information Science & Technology; 219 Ningliu Road Nanjing Jiangsu 210044 P. R. China
3. Jiangsu Key Laboratory of Molecular Medicine; Medical School; Nanjing University; 22 Hankou Road Nanjing Jiangsu 210093 P. R. China