Humidity-Resilient Wearable NO Sensors Using IL-Functionalized Cu3(HHTP)2 on PLA Textiles
Keywords:
humidity effects, ionic liquids, Cu3(HHTP)2 MOF, smart textiles, NO gas sensing, wearable devices, PLA substrates, chemiresistive sensors, mixed conduction, humidity effects, ionic liquids, Cu3(HHTP)2 MOF, smart textiles, NO gas sensing, wearable devices, PLA substrates, chemiresistive sensors, mixed conductionAbstract
Humidity poses a significant challenge to chemiresistive gas sensors, particularly in wearable applications where environmental variability is high. This review examines the humidity resilience of IL-functionalized Cu3(HHTP)2 MOFs printed on PLA textiles, as reported by Ahmadipour et al. (2025), which achieve 570% response at 100 ppm NO despite RH variations. Synthesizing 41 recent publications (2020-2025), we discuss mixed ionic-electronic conduction mechanisms and introduce an original RH-compensation model based on proton-mediated pathways. Two new tables compare RH-dependent sensitivity and baseline drift across MOF types, while figures depict conduction models and response curves. The novelty resides in proposing porous over-layers for humidity mitigation, enhancing stability from 20-80% RH. This perspective offers guidelines for designing robust wearable NO sensors for occupational monitoring, bridging gaps in real-world deployment.
