1. CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety; Institute of High Energy Physics; Chinese Academy of Sciences; Beijing 100049 China
2. Beijing Synchrotron Radiation Facility; Institute of High Energy Physics; Chinese Academy of Sciences; Beijing 100049 China
3. CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety; National Center for Nanoscience and Technology; Beijing 100190 China