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. 2015 Jul 24;10(7):e0132609. doi: 10.1371/journal.pone.0132609

Fig 5. The influence of outer liquid flow rate Q out on the stable cone-jet mode and the size of resultant droplets.

Fig 5

(a) Sequence of experimental images showing the stable cone-jet structure changing with Q out; (b) The angle of the cone θ as a function of Q out; (c) The diameter of the resultant droplets D d as a function of Q out. The applied voltages: V 1 = 4 kV, V 2 = 1.5 kV, V 3 = -5 kV; The outer liquid: 10.0 w% PLGA (Mw = 10,000) in ethyl acetate solution; The inner liquid: 4.0 w% curcumin and 1.0 w% PLGA (Mw = 50,000) in acetone solution, Q in = 0.2 mL/h; The vertical distances: h = 0.3 mm, H 1 = 2 mm, H 2 = 20 mm, H 3 = 80 mm.