Structure and electrical properties of tungsten oxide nanorods epitaxially organized on a mica substrate

DFT study on interaction of NO2 with the vacancy-defected WO3 nanowires for gas-sensing

“…That is, the initial model of crystalline WO 3 nanowire was constructed by cutting the supercell of monoclinic WO 3 structure with a virtual cylinder, as shown in Fig.1 (a). Since tungsten oxide has a close-packed plane of (010), nanowires prepared in experiments thus usually preferentially grow along the b-axis [17,18]. So the direction of the cylinder was chosen to produce wires with [010] growth direction.…”

An epitaxial hexagonal tungsten bronze as precursor for WO3 nanorods on mica

“…For instance, tungsten oxide nanorods have shown interesting properties as NH 3 [1] and humidity sensors [2]. For this reason, the synthesis of monocrystalline tungsten oxide as nanowires or nanorods is of great interest and several papers have been devoted to the growth of such one-dimensional nanostructures: Y.Q.…”

Micro-Structural, Electrical and Spectroscopic Investigations of Pulsed Laser Ablated Palladium Incorporated Nanostructured Tungsten Oxide Films

“…Tungsten oxide is highly insulating as long as the material is stoichiometric. The reported values of resistivity of physical vapor deposited tungsten oxide films lie in the range of 10 1 -10 6 m. [44][45][46][47] Delamare et al, 48 have reported a low resistivity of 5 6 × 10 −3 m for the WO 3 nanorods grown on mica substrates. In the present study the resistivity values of the investigated films lie between 0.602 m to 17 m. The slight increase in resistivity observed for the 5 wt% Pd incorporated WO 3 film compared to that of 1 wt% Pd incorporated WO 3 film can be due to the grain boundary scattering induced by the incorporated Pd segregation as suggested from the Raman spectral data.…”

“…The excellent electrochromic and photo-chromic properties of tungsten oxide make it a potential candidate for switchable windows, catalysts, lithium batteries, electro-chromic materials, high contrast systems for passive and active information display, variable reflectance mirrors and, variable emission surfaces for controlled thermal emission. [2][3][4][5] Recently, interest in nanostructured tungsten oxide is focused on use in gas sensors due to its high surface to volume ratio, high sensitivity, fast response time, room temperature operation and sensitivity to a broad range of oxidizing or reducing gases such as H 2 S, NO X , O 3 , C 2 H 5 OH, H 2 , NH 3 etc. [6][7][8][9][10] Gas sensing applications of WO 3 include environmental monitoring, automotive exhaust monitoring and medical diagnostics for the detection of toxic gases exhausted by patients suffering from various heart and lung diseases.…”