Iron-nickel co-doped ZnO nanoparticles as scaffold for field effect transistor sensor: Application in electrochemical detection of hexahydropyridine chemical

The nickel (Ni) and iron (Fe) co-doped zinc oxide nanoparticles, Zn0.97Fe0.01Ni0.02O NPs, were synthesized by a simple hydrothermal method and used for the fabrication of a highly sensitive, reliable and reproducible field effect transistor (FET) sensor for the detection of hexahydropyridine chemical. The highly dense spherical NPs of well-defined crystalline structure of the typical wurtzite hexagonal phase were obtained. The energy-dispersive X-ray spectroscopy (EDS) analysis confirmed the synthesis of Zn0.97Fe0.01Ni0.02O NPs. The highly accessible FETsensor was fabricated by depositing Zn0.97Fe0.01Ni0.02O NPs on SiO2/Si substrate and the sensing performances were measured towards the detection of different concentrations of hexahydropyridine chemical. Zn0.97Fe0.01Ni0.02O NPs modified FET-sensor showed the high sensitivity of similar to 62.28 mu A mu M-1 cm -2 and the good detection limit of similar to 79 mu M with correlation coefficient (R) of similar to 0.96405 and a short response time (10 s) towards hexahydropyridine chemical.