Jiaojiao Wang1,2, Min Li2, Bochong Tang2, Peng Xie2, Lei Ma2, Zhongbo Hu1, Yuliang Zhao2 and Zhongqing Wei2*
1 College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Yuquan Rd. 19A, Beijing 100049, China
2 CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Yuquan Rd. 19B, Beijing 100049, China
