Disposable Nonenzymatic Uric Acid and Creatinine Sensors Using PAD Coupled with Screen-Printed Reduced Graphene Oxide-Gold Nanocomposites

Figure 3

(a) Cyclic voltammograms of 1 mM uric acid in 0.1 M PBS pH 6.0 on PDA-rGO/Au with various scan rates 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, and 300 mV . (b) Plot for the anodic peak current versus the square root of the scan rate (ν^1/2) in the same solution.