Ensuring water-fouling-free operation of semiconductor-based gas sensors is essential to maintaining their accuracy, reliability, and stability across diverse applications. Despite the use of hydrophobic strategies to prevent external water intrusion, addressing in situ-produced water transport during H₂ detection remains a challenge. Herein, we construct a novel waterproof H₂ sensor by integrating single-atom Ru^(III) self-assembly with monolayer amphiphiles embedded in MoS₂. The unique monolayer structure enables the sensor to detect H₂ in the presence of water, as well as facilitate the self-transport of in situ-generated water from the H₂–O₂ reaction during H₂ detection. Molecular dynamics simulations reveal that monolayer amphiphiles exhibit a higher water diffusion coefficient than multilayer amphiphiles, making them more advantageous for removing in situ-produced water. Deployable on mobile platforms, it enables wireless H_2cat detection for up to 6 months, without the introduction of protective membranes against dust and water ingress. This work not only enhances the performance of H₂ detection but also introduces a new concept for the advancement of stable water-sensitive sensors.

中文翻译：

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单层两亲物疏水化 MoS2 介导的实时除水，实现高效的防水氢检测


确保基于半导体的气体传感器无水污染运行，对于在各种应用中保持其准确性、可靠性和稳定性至关重要。尽管使用疏水策略来防止外部水侵入，但在 H₂ 检测过程中解决原位采出水运输仍然是一个挑战。在此，我们通过将单原子 Ru^（III） 自组装与 MoS₂ 中嵌入的单层两亲物集成来构建一种新型防水 H₂ 传感器。独特的单层结构使传感器能够在有水的情况下检测 H₂，并有助于在 H₂ 检测过程中从 H₂–O₂ 反应中原位产生的水自行运输。分子动力学模拟表明，单层两亲物比多层两亲物表现出更高的水扩散系数，这使得它们更有利于去除原位产生的水。它可部署在移动平台上，可实现长达 6 个月的无线 H_2cat 检测，而无需引入防止灰尘和水进入的保护膜。这项工作不仅提高了 H₂ 检测的性能，还为稳定的水敏传感器的发展引入了一个新的概念。