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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Anal Chem. 2010 Sep 1;82(17):7127–7134. doi: 10.1021/ac1005052

Figure 4.

Figure 4

SECM approach curve to the nanopore membrane for TBA+ in 0.1 M PBS (solid line). Probe scan rate, 0.3 μm/s. The circles represent the approach curve simulated with the k value that gives the best fit with the experimental curve. The dashed and dotted lines were simulated for freely permeable (kd = 4.2 × 10−2 cm/s from eq 2 with l = 16 nm) and impermeable membranes, respectively. All simulated curves were obtained using (a, h/a, rg/a) = (1.7 μm, 0, 1.2).