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Scanning electron microscope (SEM) images of fibers used for this study. PGS/PLGA fiber mat with varying flow rates of (a) 9 µl/min / 1.5 µl/min and (b) 1.5 µl/min / 1.5 µl/min, respectively. (c) SEM image of PLGA nanofiber mat. Scale, 2µm. Average fiber diameters for Fig. 1(a), 1(b) and 1(c) were 366 ± 150 nm, 245 ± 60 nm and 166 ± 37 nm, respectively.
