926213.fig.004
Figure 4: Cyclic voltammograms of 1 × 10−4 M phenol at GCE (a), PEDOT/GCE (b), SWCNT/PEDOT/GCE (c), and SWCNT/GCE (d); 0.1 M sodium acetate buffer solution, pH 6; scan rate of 50 mV s−1.