1. College of Chemistry, Chemical Engineering and Materials Science, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
2. National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, People’s Republic of China
3. Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States