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Size distribution of PCL particles produced using different concentrations of PCL solution (a) PCL 2 wt%, (b) PCL 5 wt%, (c) PCL 10 wt%, (flow rate: 10 µl min−1, applied voltage: 10 kV), (d) polydispersivity index of particles produced in the cone-jet region as a function of flow rate (applied voltage: 10 kV). (d) Square line, PCL 2 wt% (viscosity: 2.6 mPa s); triangle line, PCL 5 wt% (viscosity: 4.6 mPa s); diamond line, PCL 10 wt% (viscosity: 11.1 mPa s).
