Figure 3.

(A) Strategy for the electrochemical detection of atrazine based on the change in electroactivity of a polymer film poly(juglone-ATZ); (1) polymer/hapten-modified electrode; (2) after complexation with anti-ATZ; (3) after addition of ATZ in solution; (B) Calibration curve measured from SWV at −450 mV/SCE, after addition of ATZ from 1 pM up to 10 μM. Adapted from [22], Copyright 2012, with permission from Elsevier; (C) RCA-based immunosensor for HE4 detection. Reprinted from [26], Copyright 2012, with permission from Elsevier; (D) Scheme of the competitive inhibition assay for detecting HbA1c (anti-HbA1c: blue Y; HbA1c: red triangle; GPP: pink triangle, surface bound); (E) Above, a representative SWV for a FDMA-modified electrodes after (a) grafting of GPP and (b) incubation in 2 μg mL⁻¹ anti-HbA1c and 13.5% HbA1c. Below, corresponding calibration curve. Reprinted from [23] with permission from The Royal Society of Chemistry.