A novel tubular NiO nanostructure was synthesized by a facile and low-cost hydrothermal strategy and then further functionalized by decorating α-Fe2O3 nanorods. The images of electron microscopy indicated that the α-Fe2O3 nanorods were assembled epitaxially on the surfaces of NiO nanotubes to form α-Fe2O3/NiO nanotubes. As a proof-of-concept demonstration of the function, gas sensing devices we...

Porous TiO2 films were prepared by the micro-arc oxidation (MAO) of Ti plates, and their CO sensing properties at low concentrations (5–100 ppm) were investigated as an application for an air quality control sensor. The obtained rutile films exhibited the maximum CO gas response at 350 ◦C, which is typical for semiconductor-type gas sensors, and the Ra/Rg was ∼1.6 for 10 ppm CO (Ra: resistance ...

The present article studied gas sensor sensing characteristics based on surface-modified porous silicon (PS) by depositing the metal oxide semiconductor layer. PS layer was prepared through electrochemical etching of crystalline in an HF-based solution. DC magnetron sputtering technology used to obtain p-CuO surface p-PS. obtained material’s structural, morphological, and behavior were investig...

There is an urgent need to develop a low-cost and high-performance gas sensor for industrial production daily life. Perovskite-type oxides are appropriate materials resistive sensors. In this paper, two gas-sensing of gadolinium orthoferrite (GdFeO3) with rod butterfly morphologies were obtained by annealing the corresponding precursors at 800 °C in muffle furnace 3 h. The GdFe(CN)6·4H2O novel ...

This article provides a comprehensive review of recent (2008 and 2009) progress in gas sensors based on semiconducting metal oxide one-dimensional (1D) nanostructures. During last few years, gas sensors based on semiconducting oxide 1D nanostructures have been widely investigated. Additionally, modified or doped oxide nanowires/nanobelts have also been synthesized and used for gas sensor applic...