NO 2 sensing properties of nanostructured tungsten oxide thin films

ppb level detection of NO2 using a WO3 thin film-based sensor: material optimization, device fabrication and packaging

“…The comparison of present study along with responses observed by other researchers using different nanostructures of WO 3 is shown in Table 1. [42][43][44][45][46][47][48][49][50][51] The present study on the WO 3 thin lm-based NO 2 sensor concludes that sub-ppb level NO 2 detection with high sensitivity and selectivity can be obtained by simple reactive-ion sputtered technique, a scalable process. The WO 3 lm selectivity towards NO 2 was tested in the presence of CO, CO 2 , SO 2 , and NH 3 gases at 150 C. The study clearly indicates the high selectivity of the lm towards NO 2 among other gas species, as represented in Fig.…”

Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature

“…It is clear from Table 1 that the WO 3 nanomesh material in this work exhibits the lowest detection limit at low operating temperature compared to other materials from Refs. [40][41][42][43][44]. In the absence of noble metal modification and ion doping, the intrinsic WO 3 nanomesh material exhibits high response and very low detection limit at low operating temperature.…”

Selectivity of Tungsten Oxide Synthesized by Sol-Gel Method Towards Some Volatile Organic Compounds and Gaseous Materials in a Broad Range of Temperatures

“…Air pollution is an important environmental issue due to intensive industrial manufacturing processes, car exhaust, biomass burning, combustion of fossil fuels, and microbiological emission from soil. The main air pollutants such as NO x , SH 2 , NH 3 , and some volatile organic compounds (VOC) contribute to a greenhouse effect and can cause respiratory diseases such as bronchitis, emphysema, as well as heart problems [1]. Therefore, the demand for new sensors, which are suitable for the determination of gases and/or VOCs, is constantly increasing.…”