fig5

Figure 5. (A) Amperometric curve of the response of Cu/Cu_xO@MWCNTs-modified GC electrode to glucose measured at 0.45 V. The insert is the i-t curve of the response of the electrode to glucose with consecutive addition of glucose ranging from 0.005 to 0.5 μM. (B) Corresponding calibration plots of Ivs. C, n = 3.