Low temperature synthesis of hexagonal ZnO nanorods and their hydrogen sensing properties

The growth of hexagonal ZnO nanorods was demonstrated by low temperature chemical synthesis approach. X-ray diffraction (XRD) analysis revealed a wurtzite hexagonal structure of the ZnO nanorods. The optical properties were measured by UV–vis spectrophotometer at room temperature. X-ray photoelectron spectroscopy (XPS) confirmed high purity of the ZnO nanorods. The hydrogen sensor made of the ZnO nanorods showed reversible response. The hydrogen gas tests were carried out in presence of ambient air and the influence of operation temperature on the hydrogen gas sensing property of ZnO nanorods was also investigated.

The growth of hexagonal ZnO nanorods was demonstrated by low temperature chemical synthesis approach. The hydrogen sensor made of the ZnO nanorods showed reversible response. The hydrogen gas tests were carried out in presence of ambient air and the influence of operation temperature on the hydrogen gas sensing property of ZnO nanorods was also investigated. (a) and (b) Low and high magnification FESEM images of hexagonal ZnO nanorods. (c) Response of a gas sensor made of ZnO hexagonal nanorods at 200 °C to H2 gas and (d) temperature verses sensitivity of ZnO hexagonal nanorods.Figure optionsDownload as PowerPoint slide