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. Author manuscript; available in PMC: 2021 Mar 5.
Published in final edited form as: ACS Appl Mater Interfaces. 2021 Jan 15;13(8):9491–9499. doi: 10.1021/acsami.0c20707

Figure 4.

Figure 4.

E-AB sensor performance using electrodes fabricated with SC-34-MB. (A) Effect of MDPV concentration on surface coverage during electrode modification. (B) Signal gain for the various electrodes prepared in panel A from various concentrations of MDPV in buffer. (C) Detection of MDPV in 50% urine using modified electrodes prepared in low-salt Tris with SC-34-MB alone (M1) or in the presence of 50 μM MDPV (M4). SWV spectra from various concentrations of MDPV using electrodes modified via target-assisted immobilization in either (D) low-salt or (E) high-salt PBS. (F) Calibration curves derived from the SWV spectra shown in D (red) and E (brown) or from electrodes prepared in low-salt (blue) or high-salt (navy) Tris buffer. (G) Linear ranges and LODs of electrodes fabricated via different methods in buffer or 50% urine. Error bars represent the standard deviation for three working electrodes from each measurement.