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. 2024 Oct 1;16(19):2789. doi: 10.3390/polym16192789

Figure 2.

Figure 2

The electrochemical pH sensor for drop-casted PANI thin films. The CVs for different pH buffer electrolytes for sample PANI20500 are shown in (a). Calibration curves plotted as E1/2 vs. pH of the set of PANI thin films deposited with volume of deposition solution equal to 20 μL (b). The sensitivities of the samples are shown in (c). The sensitivities were calculated from the redox potential calibration curve, and the highest value obtained was 127.3 ± 6.2 mV/pH for sample PANI20100. The linearities of the samples are shown in (d). The lowest linearity obtained was 98.3% in PANI15100.