Effect of Sodium Carbonate Concentrations on the Formation and Mechanism of Regenerated Silk Fibroin Nanofibers by Electrospinning

Figure 4

SEM images of electrospun silk nanofibers of the SF/FA solutions prepared from 0.005% Na₂CO₃ concentration under different silk fibroin concentrations: (a) 1%, (b) 2%, (c) 3%, and (d) 6%.

(a)

(b)

(c)

(d)