1. CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety
2. Institute of High Energy Physics
3. the Chinese Academy of Sciences
4. Beijing 100049, P. R. China
5. CAS Key Laboratory of Standardization and Measurement for Nanotechnology
6. National Center for Nanoscience and Technology
7. Beijing 100080, China
8. Key Laboratory of Microsystems and Microstructures Manufacturing
9. Ministry of Education
10. Harbin Institute of Technology
11. Harbin, China