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Unencapsulated and washable two-dimensional material electronic-textile for NO2 sensing in ambient air

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Oluwasanya, Pelumi W 
Carey, Tian 
Samad, Yarjan Abdul 
Occhipinti, Luigi G 


jats:titleAbstract</jats:title>jats:pMaterials adopted in electronic gas sensors, such as chemiresistive-based NOjats:sub2</jats:sub> sensors, for integration in clothing fail to survive standard wash cycles due to the combined effect of aggressive chemicals in washing liquids and mechanical abrasion. Device failure can be mitigated by using encapsulation materials, which, however, reduces the sensor performance in terms of sensitivity, selectivity, and therefore utility. A highly sensitive NOjats:sub2</jats:sub> electronic textile (e-textile) sensor was fabricated on Nylon fabric, which is resistant to standard washing cycles, by coating Graphene Oxide (GO), and GO/Molybdenum disulfide (GO/MoSjats:sub2</jats:sub>) and carrying out in situ reduction of the GO to Reduced Graphene Oxide (RGO). The GO/MoSjats:sub2</jats:sub> e-textile was selective to NOjats:sub2</jats:sub> and showed sensitivity to 20 ppb NOjats:sub2</jats:sub> in dry air (0.05%/ppb) and 100 ppb NOjats:sub2</jats:sub> in humid air (60% RH) with a limit of detection (LOD) of ~ 7.3 ppb. The selectivity and low LOD is achieved with the sensor operating at ambient temperatures (~ 20 °C). The sensor maintained its functionality after undergoing 100 cycles of standardised washing with no encapsulation. The relationship between temperature, humidity and sensor response was investigated. The e-textile sensor was embedded with a microcontroller system, enabling wireless transmission of the measurement data to a mobile phone. These results show the potential for integrating air quality sensors on washable clothing for high spatial resolution (< 25 cmjats:sup2</jats:sup>)—on-body personal exposure monitoring.</jats:p>



Article, /639/166/987, /639/166/988, article

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Scientific Reports

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Springer Science and Business Media LLC
EPSRC (EP/LO15889/1, EP/KO3099X/1)
Innovate UK (103543)
European Commission (685758, 881603)
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