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Effect of flow rates on the average nanofiber diameter distribution ((a): 180, (b): 184, (c): 193, (d): 198, and (e): 209 nm), respectively, from a 6% wt chitosan/TFA solution (high voltage: 20 kV; tip-to-target Distance: 10 cm), flow rate: 0.1, 0.2, 0.3, 0.4, and 0.5 mL/h.
