Figure 4.

Representative biofouling effects on the 5-HT response with both the CFME and BDDME using the Jackson waveform 0.2 V to +1.0 V to −0.1 V to 0.2V at a scan rate of 1000 V s⁻¹ and 10 Hz application frequency. (A) Current vs. time trace extracted from the color plots (B,C) for the response of 1 µM 5-HT before and after biofouling the CFME surface. (D). Extracted voltammogram from the CFME response showing the change in sensitivity from fouling to 1 µM 5-HT. (E). Current vs. time trace extracted from the color plots (F,G) for 10 µM 5-HT measured on the BDDME from before and after biofouling the electrode surface. (H). Extracted cyclic voltammogram from the color plot for the BDDME showcasing the biofouling changes to the measured response. Dashed lines on color plots indicate extracted CV and current vs. time traces. Red arrows in (D,H) indicate direction of CV peaks shift after biofouling.