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A Cross-Platform Investigation of Hg-Au Response Profiles

机译：HG-AU响应配置文件的跨平台调查

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The amalgamation of elemental mercury (Hg) with gold (Au) thin-films is a commonly utilized mechanism for sensing Hg vapor in air. In this work, we investigate and compare the sensing mechanisms of a resistive based sensor and a quartz crystal microbalance (QCM) which both employ an Au thin-film sensitive layer which was deposited under identical conditions. Both sensors were tested concurrently at several operating temperatures ranging between 30 and 130°C. Contrary to models described in the literature, which suggests that the response profile should be independent of sensing platforms, this work clearly shows that the mechanisms are different for the two tested platforms. The QCM is shown to primarily respond to the surface bound Hg, including Hg-Hg bonds, whereas the resistive wheatstone-bridge device primarily responds to Hg diffused into the Au sensitive layer, resulting in different transient responses for the same Hg concentration under identical conditions for each sensor platform.
机译：用金（Au）薄膜的元素汞（Hg）的融合是用于在空气中感测Hg蒸气的常用机制。在这项工作中，我们研究并比较并比较电阻基于传感器的传感机制和石英晶体微观（QCM），其均采用沉积在相同条件下的Au薄膜敏感层。在30至130℃之间的几个操作温度下同时测试两个传感器。与文献中描述的模型相反，这表明响应简档应该独立于传感平台，这项工作清楚地表明，两个测试平台的机制是不同的。 QCM被证明主要响应包括Hg-Hg键的表面结合的Hg，而电阻惠斯通桥装置主要响应扩散到Au敏感层的Hg，导致相同条件下相同的Hg浓度的不同瞬态响应对于每个传感器平台。

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