A comparative molecular study between chlorpyriphos and parathion using CuO nanohair pesticide sensor

We were investigating the effect of parathion and chlorpyrifos, organophosphate group pesticides (OPs) commonly used in Thailand’s agricultural sector, on Cu foil electrodes modified with CuO nanohair arrays. The electrodes were successfully synthesized using anodization and annealing; physical structures were evaluated with SEM; functional groups of pesticide structures were analyzed using ultraviolet-visible spectroscopy. Electrochemical tests demonstrated differences in current when applied cyclic voltage between -1.5 to 0.5 V. The existing functional groups in each pesticide were suggested to form different coordinate bonds that caused different current responses.