Wan Hao, Yin Heyu, Lin Lu, Zeng Xiangqun, Mason Andrew J
Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, U.S.A.
Department of Chemistry, Oakland University, Rochester, MI, 48309, U.S.A.
Sens Actuators B Chem. 2018 Feb;255(Pt 1):638-646. doi: 10.1016/j.snb.2017.08.109. Epub 2017 Aug 18.
The growing impact of airborne pollutants and explosive gases on human health and occupational safety has escalated the demand of sensors to monitor hazardous gases. This paper presents a new miniaturized planar electrochemical gas sensor for rapid measurement of multiple gaseous hazards. The gas sensor features a porous polytetrafluoroethylene substrate that enables fast gas diffusion and room temperature ionic liquid as the electrolyte. Metal sputtering was utilized for platinum electrodes fabrication to enhance adhesion between the electrodes and the substrate. Together with carefully selected electrochemical methods, the miniaturized gas sensor is capable of measuring multiple gases including oxygen, methane, ozone and sulfur dioxide that are important to human health and safety. Compared to its manually-assembled Clark-cell predecessor, this sensor provides better sensitivity, linearity and repeatability, as validated for oxygen monitoring. With solid performance, fast response and miniaturized size, this sensor is promising for deployment in wearable devices for real-time point-of-exposure gas pollutant monitoring.
空气中的污染物和爆炸性气体对人类健康和职业安全的影响日益增大，这使得监测有害气体的传感器需求不断升级。本文介绍了一种新型的小型平面电化学气体传感器，用于快速测量多种气态危害物。该气体传感器的特点是采用了多孔聚四氟乙烯基底，以实现快速气体扩散，并使用室温离子液体作为电解质。利用金属溅射法制造铂电极，以增强电极与基底之间的附着力。结合精心选择的电化学方法，这种小型气体传感器能够测量包括氧气、甲烷、臭氧和二氧化硫在内的多种对人类健康和安全至关重要的气体。与手动组装的克拉克电池前身相比，该传感器在氧气监测方面具有更好的灵敏度、线性度和重复性。凭借其出色的性能、快速的响应和小型化的尺寸，这种传感器有望部署在可穿戴设备中，用于实时现场气体污染物监测。
