Fig 1: (a) Nyquist plot of EIS responses to different concentrations of carcinoembryonic antigens (CEA) in 0.1 M PBS solution (pH = 7.4); (b) The calibration curve between the relative change rate of Rct and concentration of CEA in PBS samples (n = 5); (c) Nyquist plot of EIS responses to different concentrations of CEA in human serum samples; (d) The calibration curve between the relative change rate of Rct and concentration of CEA in human serum samples (n = 5).
Fig 2: (a) Comparison of Rct response of aptasensors in the presence of other analytes including bovine serum albumin (BSA), prostate specific antigen (PSA), and insulin, as well as the working electrode without immobilizing CEA aptamers; (b) Comparison of Rct response of the proposed paper-based aptasensor and paper-based immunoassay sensing method.
Supplier Page from Abcam for Anti-CEACAM5 antibody