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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: Oxidizing and Nano-dispersing the Natural Silk Fibers

Fig. 2

Representative SEM observation of resultant silk fibers in each process. a Disassembled BS fibers after formic acid pretreatment, b oxidized BS fibers, and c the BS nanofibers with a diameter of 105 ± 27 nm. d Disassembled AS fibers after formic acid pretreatment, e oxidized AS fibers, and f the AS nanofibers with a diameter of 112 ± 33 nm. The contour length of BS and AS nanofibers is more than 1 μm

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