1. CAS
Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety,
CAS Center of Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
2. Department
of Chemistry, Tsinghua University, Beijing 100084, P. R. China
3. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
4. Laboratory
for Biomaterials and Drug Delivery, Department of Anesthesiology,
Division of Critical Care Medicine, Children’s Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, Massachusetts 02115, United States