W$_{3}$O Nanowires as Gas Sensors

N$_{2}$O interaction on thin films of W$_{3}$O nanowires and nanoparticles at different temperatures and concentrations was investigated. W$_{3}$O nanowire and nanoparticle films were synthesized on quartz substrates by Hot Filament Chemical Vapor Deposition. DC resistance measurements in the Van der Pauw geometrical methods were conducted on the films. It was observed that the W$_{3}$O nanowire thin film as a gas sensor resulted in an improved sensitivity as compared to the W$_{3}$O nanoparticle thin film. Impedance Spectroscopy measurements (1mHz - 100kHz) were also performed in both films to understand the underlying mechanism for these different responses. Measurements on single W$_{3}$O nanowire will also be presented.