Figure 7
Nyquist plot for impedence measurement and corresponding calibration curve of (A,B) PSA-Aptamer and (C,D) Anti-PSA modified electrodes in presence of different concentration of PSA (0 to 11.6 ng mL−1) in human blood serum in PBS (pH 7.4) containing 5 mM [Fe(CN)6]3−/4−.
