Room temperature NO2-sensing properties of WO3 nanoparticles/porous silicon

Fabrication of highly sensitive gas sensor based on Au functionalized WO3 composite nanofibers by electrospinning

“…This is mainly due to a large surface to volume ratio achieved in this case leading to more available surface reaction sites for the absorption of gas species. As a consequence, many research efforts have been focused on the fabrication of gas sensors based on micro/nano-structured amorphous WO 3 films [6][7][8], and various shapes of WO 3 nanostructures, including nanoplates [9], nanoneedles [10], nanorods [11] and nanoparticle (NPs) [12].…”

Optimization of tungsten oxide films electro-deposited on macroporous silicon for gas sensing applications: Effect of annealing temperature

“…Ma et al [15,16,28] have grown different morphologies of tungsten oxide onto MPS for gas sensing application using an expensive, complex and time consuming technique for such deposition [27]. In the present work, optical, structural, electrical and sensing properties of WO x films, deposited onto the MPS substrate through inexpensive, facile and rapid technique (i.e.…”

“…Fang et al [25] reported WO x films with different stoichiometries, deposited on Si(111) wafers by pulsed laser deposition technique; Galléa et al [26] investigated the growth process of WO x nanostructures deposited on Si substrates by a thermal oxidation and constructed a phase growth diagram with the possibility to realize the phase selection and morphology control of WO x . Recently Yan et al [27] synthesized WO x nanoparticles by sol-gel method and deposited it onto the porous silicon and alumina substrates by dip-coating. Gas sensing tests experimentally demonstrated an improved NO 2 -sensing with PS substrates decorated with WO 3 nanoparticles, as compared to WO x deposited on alumina or pristine/pure PS.…”

Preparation and room temperature NO 2 -sensing performances of n-porous silicon/n-WO 3 nanowires heterojunction

“…Alternatively, WO3 nanostructures have been also synthesized on porous silicon (PS) substrate to obtain great gas sensing properties [18][19][20]. PS has been used extensively for NO2 detection at low temperatures due to its large specific surface area and high chemical reactivity over the last decade [18].…”