Fig. 1
From: Anderson light localization in biological nanostructures of native silk
Nanofibrillar structures in a silkworm silk fibre. a 3D illustration of light localization in a single silk filament of nanofibrillar structures (yellow translucent cylinders). b, c SEM showing a freeze fractured edge of twin fibroin filaments b and nanofibrils c. d–f TEM with different magnifications. The colour-coded overlay in d distinguishes nanofibrils, voids and sericin layers. The dark granule-like dots in e, f indicate nanofibrils. g 2D fast Fourier transforms of e. h, i Histograms of scattering centre size (h) and distance (i). j 3D rendering of reconstructed nanofibril trajectories (cylinders) in a single filament (Supplementary Movie 1). Each connected component is labelled to a different colour. The 3D nanofibril trajectories are reconstructed from z-stack reflectance confocal microscopy images (Olympus FV1000) of a sericin-removed silk filament (×60 water immersion objective, confocal aperture of 55 µm, stack size of 7.5 µm and step size of 100 nm)
