Gas Sensors Articles

  • A comparative study on the NH
    3
    gas-sensing properties of ZnO, SnO
    2
    , and WO
    3
    nanowire

    In this work, a large quantity of ZnO, SnO2 and WO3 nanowires (NWs) was successfully synthesised by simple and efficient methods. Their morphology and microstructure were characterised by FE-SEM, TEM, XRD, PL, and Raman. The NH3 gas-sensing ...


    By Inderscience Publishers

  • Growth and gas-sensing studies of metal oxide semiconductor nanostructures

    One-dimensional (1D) nanostructures of semiconductor oxides are of interest for various applications including gas sensors. For gas sensors, nanostructures have advantages of improved gas-sensing characteristics and have potential in fabrication of miniature sensor. In this paper, we review some of the work done in our laboratory towards growth of nanostructures of SnO2, ZnO and CuO and ...


    By Inderscience Publishers

  • Transparent conductive oxide materials: financial stakes and technological challenges

    Although transparent conductive oxides (TCOs) have been known and used for quite some time, research on these materials is still very active to improve their characteristics. This paper is aimed at giving an overview of the contribution of the TCO materials to the economy in various fields of applications (flat panel displays, photovoltaics, light-emitting diodes, smart windows, gas sensors, ...


    By Inderscience Publishers

  • Effect of chemical oxidation on the gas sensing properties of multi-walled carbon nanotubes

    The effect of chemical oxidation on the gas sensing properties of multi-walled carbon nanotubes (MWNT) is presented in this paper. The MWNT were chemically oxidised in a mixture of concentrated sulphuric and nitric acids. The oxidation time was varied from 4 h to 12 h. X-ray photoelectron spectroscopy was used to study the effect on the chemical composition of the nanotube surface. The results ...


    By Inderscience Publishers

  • Nano-structural and surface characteristics of non-stoichiometric In2O3−x thin films

    In this work we present recent results on non-stoichiometric In2O3−x thin films grown by dc magnetron sputtering technique focusing on structural and surface characterisation using cross-section transmission electron microscopy (XTEM), Atomic force Microscopy (AFM) and X-ray diffraction (XRD). The films were amorphous in the early stage of growth becoming crystalline after a critical thickness. ...


    By Inderscience Publishers

  • Some recent trends in the fabrication, functionalisation and characterisation of metal oxide nanowire gas sensors

    Due to strong interdependence of the electron transport and surface processes in quasi 1-D metal oxide nanostructures, chemiresistors and field effect transistors (FETs) based on nanowires perform excellently as sensing elements and may be able to compete with traditional thin film sensors in the field of solid state sensorics. Namely, applications requiring a stable, reproducible sensing element ...


    By Inderscience Publishers

  • Study of defect behaviour in Ga2O3 nanowires and nano-ribbons under reducing gas annealing conditions: applications to sensing

    The growth of monoclinic Ga2O3 nanowires, nano-ribbons and nano-sheets has been investigated. Results indicate that high quality single crystal nanowires can be grown at 900?C using an Au catalyst, while single crystal nano-ribbons and nano-sheets require no metal catalyst for growth. Since bulk Ga2O3 is a promising material for high temperature gas sensing, Ga2O3 nanowires and nano-ribbons may ...


    By Inderscience Publishers

  • Nonaqueous synthesis, assembly and formation mechanisms of metal oxide nanocrystals

    Nonaqueous solution routes to metal oxide nanoparticles are a valuable alternative to the well-known aqueous sol-gel processes, offering advantages such as high crystallinity at low temperatures, robust synthesis parameters and avoidance of surfactants in order to control the crystal growth. In the first part of this paper we give an overview of the various solution routes to metal oxides in ...


    By Inderscience Publishers

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