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Hierarchical structure of A. yamamai silk fiber. A, schematic of the hierarchical structure of A. yamamai silk. B-C, polarized light microscopy image of A. yamamai silk. D, the cross-sectional SEM image of A. yamamai silk after tensiled to fracture. E, cross-sectional SEM image of A. yamamai silk fiber embedded in epoxy resin. Reproduced with permission. [11] Copyright 2018, American Chemical Society.
