Department of Materials Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
ACS Sens. 2022 Mar 25;7(3):716-721. doi: 10.1021/acssensors.1c02721. Epub 2022 Mar 16.
The sensing of gas components in a mixed gas is required for breath-based health monitoring and diagnosis. In this work, we report the simultaneous detection of mixed-gas components using a sensor consisting of [EMIM][BF]-based ionic gel with four electrodes made of Au, Pt, Rh, and Cr. The voltage between any given pair of electrodes depends on the gas molecules absorbed in the ionic gel and the elements the electrodes are made of. When the voltage signals between all pairs of electrodes were used, H, NH, and CHOH concentrations were simultaneously estimated by a neural-network-based inference. From molecular dynamics simulations, the origin of the voltage signal was attributed to the catalytically generated adsorbates on the electrodes.
在基于呼吸的健康监测和诊断中，需要对混合气体中的气体成分进行感测。在这项工作中，我们报告了使用由 [EMIM][BF] 基离子凝胶和由 Au、Pt、Rh 和 Cr 制成的四个电极组成的传感器对混合气体成分的同时检测。任意给定的两个电极之间的电压取决于离子凝胶中吸收的气体分子和电极的元素。当使用所有电极对之间的电压信号时，通过基于神经网络的推断可以同时估计 H、NH 和 CHOH 的浓度。通过分子动力学模拟，将电压信号的起源归因于电极上催化生成的吸附物。
