1. Institute of Functional Nano and Soft Materials Laboratory (FUNSOM); Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou Jiangsu 215123 China
2. Department of Radiology; University of Wisconsin-Madison; Madison WI USA
3. Materials Science Program; University of Wisconsin-Madison; Madison WI USA
4. School of Radiation Medicine and Protection and School for Radiological and Interdisciplinary Sciences (RAD-X); Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection; Soochow University; Suzhou Jiangsu 215123 P.R. China
5. Center for Molecular Imaging and Translational Medicine; School of Public Health; Xiamen University; Xiamen Fujian 361005 P.R. China
6. Department of Medical Physics; University of Wisconsin-Madison; Madison WI USA