title: Nanostructured Tungsten Oxide Composite for High-Performance Gas Sensors.
abstract: We report the results of composite tungsten oxide nanowires-based gas sensors. The morphologic surface, crystallographic structures, and chemical compositions of the obtained nanowires have been investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman scattering, respectively. The experimental measurements reveal that each wire consists of crystalline nanoparticles with an average diameter of less than 250 nm. By using the synthesized nanowires, highly sensitive prototypic gas sensors have been designed and fabricated. The dependence of the sensitivity of tungsten oxide nanowires to the methane and hydrogen gases as a function of time has been obtained. Various sensing parameters such as sensitivity, response time, stability, and repeatability were investigated in order to reveal the sensing ability.
authors.affiliation: Escuela Secundaria de la Universidad de Puerto Rico, San Juan, PR 00936, USA. sfengpr@gmail.com.
authors.forename: Siyuan Feng
authors.initials: SF
authors.lastname: Chen
authors.affiliation: Department of Chemistry, King Saud University, Riyadh 11451, Saudi Arabia. aaldalbahi@ksu.edu.sa.
authors.forename: Ali
authors.initials: A
authors.lastname: Aldalbahi
authors.affiliation: Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA. peter.feng@upr.edu.
authors.forename: Peter Xianping
authors.initials: PX
authors.lastname: Feng
keywords: gas sensor; response; sensitivity; tungsten oxide composite nanowires