Facile Fabrication of CuO Nanoparticles Embedded in N-Doped Carbon Nanostructure for Electrochemical Sensing of Dopamine

Figure 4

(a) Cyclic voltammograms of GCE, NDC, and CuO-NDC with DA at 100 mV/s scan rate, (b) cyclic voltammograms of CuO-NDC at different scan rates (25, 50, 75, 100, 125, 150, 175, and 200 mV/s), (c) relationship between redox peak current and scan rate (); (d) differential pulse voltammograms of different concentrations of dopamine on CuO@NC electrode in electrolyte solution, (e) plot of current versus concentration of DA, and (f) relationship between the peak potential (Ep) and the natural logarithm of scan rate.

(a)

(b)

(c)

(d)

(e)

(f)