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. 2017 Sep 13;33(46):13262–13271. doi: 10.1021/acs.langmuir.7b01985

Figure 1.

Figure 1

Products of the co-electrospraying of immiscible and miscible core/shell solution combinations: (a) PCL/chloroform (9 wt %) only, (b) PCL/chloroform (9 wt %) + water as core, (c) PCL/chloroform (9 wt %) + PEO/water (1 wt %), (d) PCL/chloroform (9 wt %) + PEG/water (15 wt %), (e) PCL/chloroform (9 wt %) + cyclohexane, and (f) PCL/chloroform (5 wt %) + PEG/chloroform (15 wt %). Co-electrospraying settings: applied voltage, 9 kV; working distance, 20 cm; core/shell flow rate, 0.5/2 mL/h (except in part f, where the core/shell flow rate was 1.0/3.0 mL/h). Insets in parts a and f: cross-section of electrosprayed solid PCL microspheres (scale bar: 130 μm) and a confocal laser scanning microscope image showing the core–shell structure (scale bar: 10 μm), respectively. Spheres in these SEM images were collected on a static wire electrode placed above the aluminum foil substrate.