Self-assembly of silk fibroin. A, Illustration of SF fibrils in Aqueous solution. B, AFM image of SF fibrils. Reproduced with permission.[22e] Copyright 2014, Wiley-VCH. C, Illustration of SF assembled with Nanofibril interface. D, AFM image of assembled SF-30 wt% CNF materials. Reproduced with permission. [27] Copyright 2017, American Chemical Society. E, Illustration of SF fibrils assembled with graphene nanosheet. F, AFM image of the hybrid prepared from SF/graphene (8:2) assembly at pH 10.3. Reproduced with permission.[29] Copyright 2017, American Chemical Society. G, Illustration of SF assembly within oil/water interface. H, 3D reconstructions of confocal images of silk micrococoons assembled by SF. Reproduced with permission.[32] Copyright 2017, Springer-Nature.