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(a) Schematic illustration for electrospinning on iron block in HFIP/TFA (85:15, v/v). SEM observation of electrospun (b) Col, (c) Col/α-Chi, and (d) Col/β-Chi mats and corresponding width distributions constituting the nanofibers (n = 100, inset: magnified images and all scale bars are 3 μm).
