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Metal-polymer hybrid nanomaterials for plasmonic ultrafast hydrogen detection

机译：用于等离子体超快氢检测的金属-聚合物杂化纳米材料

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摘要

Hydrogen-air mixtures are highly flammable. Hydrogen sensors are therefore of paramount importance for timely leak detection during handling. However, existing solutions do not meet the stringent performance targets set by stakeholders, while deactivation due to poisoning, for example by carbon monoxide, is a widely unsolved problem. Here we present a plasmonic metal-polymer hybrid nanomaterial concept, where the polymer coating reduces the apparent activation energy for hydrogen transport into and out of the plasmonic nanoparticles, while deactivation resistance is provided via a tailored tandem polymer membrane. In concert with an optimized volume-to-surface ratio of the signal transducer uniquely offered by nanoparticles, this enables subsecond sensor response times. Simultaneously, hydrogen sorption hysteresis is suppressed, sensor limit of detection is enhanced, and sensor operation in demanding chemical environments is enabled, without signs of long-term deactivation. In a wider perspective, our work suggests strategies for next-generation optical gas sensors with functionalities optimized by hybrid material engineering.
机译：氢气-空气混合物高度易燃。因此，氢气传感器对于在处理过程中及时发现泄漏至关重要。但是，现有的解决方案不能满足利益相关者设定的严格性能目标，而由于中毒（例如由一氧化碳引起的停用）是一个尚未广泛解决的问题。在这里，我们提出了等离激元金属-聚合物杂化纳米材料的概念，其中聚合物涂层降低了氢转移进和离出等离激元纳米粒子的表观活化能，同时通过定制的串联聚合物膜提供了抗失活性。与纳米颗粒独特提供的信号转换器的优化的体积表面积比相一致，这可以实现亚秒级的传感器响应时间。同时，抑制了氢吸附滞后，增强了传感器的检测极限，并允许在苛刻的化学环境中运行传感器，而没有长期停用的迹象。从更广泛的角度来看，我们的工作提出了通过混合材料工程优化功能的下一代光学气体传感器的策略。

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