Department of Computer Science, Universidad Autónoma de Madrid, Francisco Tomás y Valiente 11, 28049 Madrid, Spain.
Sensors (Basel). 2020 May 11;20(9):2745. doi: 10.3390/s20092745.
The use of the photoacoustic effect to gauge the concentration of gases is an attractive alternative in the realm of optical detection methods. Even though the effect has been applied for gas sensing for almost a century, its potential for ultra-sensitive and miniaturized devices is still not fully explored. This review article revisits two fundamentally different setups commonly used to build photoacoustic-based gas sensors and presents some distinguished results in terms of sensitivity, ultra-low detection limits, and miniaturization. The review contrasts the two setups in terms of the respective possibilities to tune the selectivity, sensitivity, and potential for miniaturization.
利用光声效应来衡量气体浓度是光学检测方法领域中一种极具吸引力的替代方法。尽管该效应已经在气体传感领域应用了近一个世纪，但它在超灵敏和小型化设备方面的潜力尚未得到充分探索。本文回顾了两种常用的构建基于光声的气体传感器的基本不同设置，并根据灵敏度、超低检测限和小型化等方面展示了一些杰出的结果。本文还比较了这两种设置在调谐选择性、灵敏度和小型化潜力方面的各自可能性。
