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. Author manuscript; available in PMC: 2014 Dec 18.
Published in final edited form as: Chem Eng Sci. 2013 Sep 18;104:10.1016/j.ces.2013.09.020. doi: 10.1016/j.ces.2013.09.020

Fig. 4.

Fig. 4

SEM of electrosprayed composite microspheres prepared based on a constant core flow rate (1.0 ml/h), but different shell flow rates. The nozzle voltage (4.5 kV), the core and shell polymer concentrations (20% (w/v)), and the nozzle-to-collector distance (15 cm) were maintained. Scale bar = 25 μm.