Low Cost CuO Nanorod Growth on Screen-printed Carbon Electrode for Pesticide Analysis

摘要

To evaluate the effectivity of low-cost electrodes for the application of pesticide analysis, two alternatives fabricated from Cu foil and screen-printed carbon electrodes (SPCE) modified with CuO nanorod arrays were compared. Cu foils were modified through anodization and annealing; SPCEs were modified through electrodeposition and anodization; SEM images showed CuO nanorods on SPCEs were smaller and denser than those on Cu foils. The current drop sensitivity (ΔI/I) caused by pesticide inhibition were obtained from cyclic voltammograms as -0.23 for Cu modified on SPCE and -0.26 for modified Cu foil. The results indicated that our alternative SPCE modified with CuO nanorods presents a potential toward future development as a portable pesticide sensor.