Fig. 5. (a) EIS response of Ab/Cu3(BTC)2/PANI biosensor toward different concentration of cTnI (1–400 ng mL−1); (b) corresponding calibration plot between Rct values and cTnI concentration; (c) experimental and fitted Nyquist plots for the response of Ab/Cu3(BTC)2/PANI sensor towards 400 ng mL−1 and 200 ng mL−1 cTnI; (d) experimental and fitted Nyquist plots for the response of Ab/Cu3(BTC)2/PANI sensor towards 100 ng mL−1, 10 ng mL−1, and 1 ng mL−1 cTnI.
