Highly Sensitive Immunosensing of Carcinoembryonic Antigen Based on Gold Nanoparticles Dotted PB@PANI Core-Shell Nanocubes as a Signal Probe

Figure 4

(a) DPV responses of the as-prepared immunosensor after incubation with CEA concentrations (From a–g: 0.001, 0.01, 0.1, 1.0, 10.0, 50.0, and 100 ng·mL⁻¹) in 0.1 M PBS (pH 6.5). (b) Calibration curves of the immunosensor. Error bars represent standard deviations from five repeated measurements.

(a)

(b)