Solution-processed SnO2 nanowires for sensitive and fast-response H2S detection

Solution-processed nanocrystalline semiconductors possess ease of processing, physical flexibility and large area coverage, which are beneficial for developing high performance gas sensors with low cost. Here we reported low temperature chemiresistive gas sensors based on SnO2 nanowires that were synthesized and dispersed in solution. The gas sensors were fabricated via a room-temperature spin-coating route and their sensing properties toward H2S at low temperatures were investigated. The sensors exhibited sensitive response upon H2S gas exposure at 70 degrees C with fast response (2 sat 50 ppm) and the response was fully recoverable upon H2S gas release. The highly sensitive response, combined with the benefit of room-temperature fabrication, make the solution processed SnO2 nanowires attractive candidates for the construction of gas sensors. (C) 2016 Elsevier B.V. All rights reserved.