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

Figure 5

Square-wave voltammograms of (a) bare SPCE, (b) GO/SPCE, (c) PDA-rGO/SPCE, (d) GO/Au/SPCE, and (e) PDA-rGO/Au/SPCE in 0.1 M PBS pH 6.0 containing 1 mM uric acid.