* Corresponding authors

^a School of Life Sciences, University of Science & Technology of China, Hefei, Anhui 230027, P. R. China

^b Department of Bioengineering, California Nanosystems Institute and Center for Minimally Invasive Therapeutics, University of California, Los Angeles, Los Angeles, CA 90095, USA
E-mail: guzhen@ucla.edu

^c Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, China

^d Institutes for Life Sciences, School of Biomedical Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510006, P. R. China
E-mail: mcjwang@scut.edu.cn

^e National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, Guangdong 510006, P. R. China

^f Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510006, P. R. China

^g Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou, Guangdong 510006, P. R. China