Figure 4

Detection of dopamine. (a) DPV curves of the Pd/NPG wire biosensor at various concentrations of DA (from 1 to 220 μΜ). (b) Plots of the anodic peak currents versus the concentrations of DA of Pd/NPG wire biosensor (1, 5, 10, 30, 50, 100, 150, 200, 220 μΜ) and NPG wire biosensor (30, 50, 100, 150, 200 μΜ).