Development of Room-Temperature H2S Gas Sensor Using Flower-Like Zno Nanorods

Abstract

- Flower-like ZnO nanorods have been directly deposited on a glass substrate with prefabricated interdigitated electrodes using a modified hydrothermal method. The flower-like nanorods were fabricated in two different rod dimensions and grain sizes. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) characterization measurements were performed to confirm the uniform hexagonal wurtzite structure of the ZnO nanorods. The H 2 S gas sensing properties of the nanorod samples were investigated at room temperature. The response value of 7.4 with 293s response time and 186s recovery time is achieved toward 100ppm H 2 S at room temperature, demonstrating the potential of the sensing layer as a promising candidate for room temperature gas sensing applications.