1. National Engineering Research Center for Nanotechnology, Shanghai 200241, China
2. School
of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
3. Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
4. Department
of Medical Imaging, Jinan Military General Hospital, Shandong Province 250031, China