Mechanical Properties of Robust Ultrathin Silk Fibroin Films (pages 2229–2237)
C. Jiang, X. Wang, R. Gunawidjaja, Y.-H. Lin, M. K. Gupta, D. L. Kaplan, R. R. Naik and V. V. Tsukruk
Version of Record online: 2 AUG 2007 | DOI: 10.1002/adfm.200601136
Freely suspended multilayer films of silk fibroin fabricated by spin-assisted layer-by-layer assembly exhibit high elastic moduli of 6–8 GPa and ultimate tensile strengths reaching up to 100 MPa. The gradual development of a self-reinforcing microstructure of highly crystalline β-sheets, serving as reinforcing fillers and physical crosslinks (see figure) are suggested to be fundamental for these properties. Such regenerated silk fibroin films have great potential in various bio-related applications.