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. Author manuscript; available in PMC: 2013 Jul 14.
Published in final edited form as: Soft Matter. 2012 May 28;8(26):2897–2905. doi: 10.1039/C2SM25783A

FIGURE 6.

FIGURE 6

(A) Hypothetical E-gel growth curves (solid lines) and the measured 0.8 mA growth curve (dashed line). The solid blue line represents a growth rate that is twice that of the 0.8 mA case (labeled as 2x Rate), whereas the solid red line is 4-times the 0.8 mA growth rate (labeled as 4x Rate). (B) Corresponding voltage curves (solid lines, see Results for more details on how voltage was estimated) for the hypothetical E-gel growth curves (2x and 4x Rate) and the observed 0.8 mA voltage (dashed line). (C) The model predicts that a current of 2 mA is needed to achieve the E-gel growth curve of 2x Rate, and 3 mA is necessary for the 4x Rate. The resulting concentration profiles for the 2 mA and 3 mA cases are essentially the same (solid black line). The 0.8 mA concentration profile (dashed red line) is plotted for comparison. The profiles correspond to different time points but the same E-gel depth (x=0.6cm) (D) pH distributions, essentially identical for the 2 mA and 3 mA cases (solid black line) and the 0.8 mA case (dashed red line).