Abstract
)Abstract Well-aligned Zinc oxide (ZnO) nanowires were synthesized on silicon substrates by a carbothermalevaporation method using a mixture of ZnO and graphite powder with Au thin film was used as a catalyst.The XRD results showed that as-prepared product is the hexagonal wurzite ZnO nanostructure and SEMimages demonstrated that ZnO nanowires had been grown along the [0001] direction with hexagonal crosssection. As-grown ZnO nanowires were coated with glucose oxidase (GOx) for glucose sensing. Glucoseconverted into gluconic acid by reaction with GOx and two electrons are generated. They transfer into ZnOnanowires due to the electric force between electrons and the positively charged ZnO nanostructures in PBS.Photoluminescence (PL) spectroscopy was employed for investigating the movements of electrons, and the peakPL intensity increased with the glucose concentration and became saturated when the glucose concentrationis above 10 mM. These results demonstrate that ZnO nanostructures have potential applications in biosensors.Keywords ZnO nanowires, glucose sensor, glucose oxidase (GOx), photoluminescense (PL)
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