Monolayer Amphiphiles Hydrophobicize MoS 2 -Mediated Real-Time Water Removal for Efficient Waterproof Hydrogen Detection
Résumé
Ensuring the water fouling-free operation of semiconductor-based gas sensors is crucial to maintaining their accuracy, reliability, and stability across various applications. However, achieving a balance between waterproofing and timely leak detection remains challenging in terms of current hydrophobic strategies. Herein, we construct a novel waterproof H2 sensor by integrating single-atom Ru (III) self-assembly with hydrophobic monolayer micelles embedded in MoS2. The unique monolayer structure enables the sensor to detect H2 in the presence of water, as well as facilitating the self-transport of in-situ generated water from the H2-O2 reaction during H2 detection.
Simultaneously, single-atom Ru (III) exhibits high H2 dissociation ability and works synergistically with monolayer micelles of efficient H2 enrichment, reducing the response time to 3.5 s, compared to 21 s for pristine MoS2 and 9.7 s for multilayer micelles. Deployable on mobile platforms, it enables wireless H2 detection for up to 6 months, without introduction of protective membranes against dust and water ingress. This work significantly broadens the utility of semiconductor-based gas sensors for rapid gas detection in harsh environments.
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