Figure 5.

E-AB sensor performance using electrodes modified with SC-34-MB in the presence (target-assisted immobilization) or absence (traditional immobilization) of 50 μM MDPV in low-salt PBS at pH (A) 8.0, (B) 7.4, (C) 7.0, and (D) 6.0. The top panels show calibration curves for electrodes fabricated via target-assisted aptamer immobilization (red) or traditional modification method (black) produced by challenging with 0–100 μM MDPV, and bottom panels show their respective linear ranges. Error bars represent the standard deviation of measurements from three independently fabricated electrodes.