Abstract
sStretchable chemical sensors for detection of gases/vapours are of great interest for wearable applications in healthcare and environmental safety. Here, we demonstrate a simple but effective approach based on layering electro-spun elastomeric polyurethane (PU) nanofibres to produce stretchable chemically responsive nanohybrids of PU nanofibres with self-assembled reduced-graphene oxide (R-GO). The study using a chemiresistive structure reveals the positive effects of layering the elastomeric fibres of R-GO/PU nanohybrids on both stretching and sensing capabilities. The R-GO/PU devices layered four and five times own excellent sensitivity towards NO2 (50 ppb‒5 ppm at room temperature) as well as mechanical sustainability under static and cyclic stretching tests up to 50% of strain. These stretchable chemiresistors based on multilayering of hybrid fibre network of an elastomer and 2D sensing nanomaterials provides a good premise for wearable chemical sensing applications.
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