The development of vapor sensors with tunable sensitivity and selectivity is highly desirable because of the manifold applications ranging from air quality monitoring to food control. The design of such sensors remains, however, a great challenge. Here, we address this challenge by intercalating primary and tertiary alkylamines with varying alkyl chain lengths into H₃Sb₃P₂O₁₄ nanosheet-based Fabry-Pérot interference sensors. As the sensors are photonic in nature, the different amines can be distinguished based on their intercalation time and optical shift. Since the amines are protonated during intercalation and therefore trapped, this allows us to use amine modification as the basis for creating optical sensors. Intercalation of different amines gradually and widely tunes the sensor’s sensitivity and selectivity to various analytes. This adjustment of sensing properties allows us to construct a sensor array on a single chip, which can distinguish different volatile organic compounds. The color change of this sensor array upon exposure to solvent vapors can be tracked with the naked eye, making this system a promising platform for the high-fidelity identification of volatile compounds. The sensor design protocol presented herein is straightforward and robust and can be transferred to other nanosheet-based devices for the rational tuning of their vapor-sensing properties and beyond.

中文翻译：

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气相胺插层用于光子纳米片传感器的合理设计

由于从空气质量监测到食品控制的多种应用，迫切需要开发具有可调灵敏度和选择性的蒸汽传感器。然而，这种传感器的设计仍然是巨大的挑战。在这里，我们通过将具有不同烷基链长的伯和叔烷基胺插入H ₃ Sb ₃ P ₂ O _14来应对这一挑战。基于纳米片的Fabry-Pérot干涉传感器。由于传感器本质上是光子传感器，因此可以根据其插入时间和光学位移来区分不同的胺。由于胺在插入过程中被质子化并因此被捕获，因此这使我们可以使用胺改性作为创建光学传感器的基础。不同胺的插入逐渐广泛地调节了传感器对各种分析物的灵敏度和选择性。感测特性的这种调整使我们能够在单个芯片上构建一个传感器阵列，从而可以区分不同的挥发性有机化合物。可以用肉眼跟踪传感器阵列在暴露于溶剂蒸汽时的颜色变化，这使得该系统成为用于高保真度鉴定挥发性化合物的有前途的平台。