1. Nano Medical Engineering Laboratory, RIKEN; 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan
2. School of Pharmaceutical Sciences; Jilin University; No. 1266 Fujin Road Changchun Jilin 130021 P.R. China
3. Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Chinese Academy of Sciences; Changchun Jilin 130022 P.R. China
4. Lipid Biology Laboratory, RIKEN; Japan
5. Emergent Bioengineering Materials Research Team; RIKEN Center for Emergent Matter Science; 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan