1. Institute of High Energy PhysicsChinese Academy of Science (CAS)CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety No. 19A Yuquan Road Beijing 100049 China
2. CAS Center for Excellence in NanoscienceCAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology (NCNST)Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of Sciences No. 11 Beiyitiao, Zhongguancun Beijing 100190 China
3. Beijing Institute of Fashion Technology No. 2, Yinghuadong, Chaoyang Beijing 100029 China
4. Crump Institute for Molecular ImagingCalifornia NanoSystems InstituteDepartment for Molecular and Medical Pharmacology UCLA Los Angeles CA 90095 USA