(A) Typical cyclic voltammogram of a solution containing 2 mM KFeCy showing the linear regression used for the baseline correction of the cathodic peak. The peak was integrated after the linear regression to obtain the total charge transferred from the redox process. (B) Relative charge transfer plot of 20–400 nm MSEs coated with 0.5 mg/mL DMPC after being exposed to a 0.1% SDS solution for 10 minutes. The charge transferred was normalized to bare electrodes without membranes (dotted line). Bars represent the mean values and error bars shown are standard deviations obtained from n = 3 replicate sensors.