Fig. 4

(A) The bar plots demonstrating the effect of pH on the sensor’s response (AuNSs = 100 μL, MES buffer = 5.0 mM, iron(III) edta = 20 µM, Ag = 300 µM, AA = 200 µM, H₂O₂ = 60 µM). (B) The bar plots demonstrate the effect of iron(III) edta on the sensor’s response.