No abstract

No abstract

No abstract

In this work, a sensor layer based on zinc oxide nanowires was synthesized by low-temperature hydrothermal method. The gas sensitivity of sample to isopropyl alcohol vapor was studied both during heating and under ultraviolet radiation. It was shown that depending on the presence of moisture on the surface of zinc oxide nanowires, isopropyl alcohol vapor can act as a reducing or oxidizing gas upon activation of gas sensitivity by ultraviolet irradiation. It was shown that there is an optimal intensity of irradiation, which determines the maximum response of sample. The gas sensitivity under moist air conditions demonstrates the possibility of practical application of adsorption resistive gas sensors with light-activation at room temperature.

Nanostructures based on zinc oxide were synthesized on ceramic substrate with interdigitated electrodes by spin-coating and low-temperature hydrothermal method. The sensor response to CO, CO2 and O2 was studied at room temperature under near UV light illumination. Gas exposure was supplied using metrological certified equipment. All samples showed no response to CO2. Layers based on zinc oxide nanowires are most sensitive to CO because of complex morphology and more effective adsorption of gas molecules. The obtained dependencies allow us to characterize the interaction of nanostructure based on zinc oxide with the main oxidizing and reducing atmosphere gases.

No abstract

Zinc oxide and zinc stannate nanowires were synthesized by hydrothermal method. Zinc oxide nanowires were doped by iodine. The formation of multicomponent and doped oxides was studied by X-ray photoelectron spectroscopy. It was found that formation of zinc stannate from zinc oxide nanowires occurs in 1 hour. The percentage of OH-groups increases on the surface of zinc oxide nanowires as a result of doping by iodine.

No abstract