Acoustic impedance-based surface acoustic wave chip for gas leak detection and respiratory monitoring.

ABSTRACT: Acoustic impedance enables many interesting acoustic applications. However, acoustic impedance for gas sensing is rare and difficult. Here we introduce a micro-nano surface acoustic wave (SAW) chip based on the acoustic impedance effect to achieve ultra-fast and wide-range gas sensing. We theoretically established the relationship between surface load acoustic impedance and SAW attenuation, and analyzed the influence of acoustic impedance on acoustic propagation loss under different gas/humidity media. Experimental measurements reveal that the differences in acoustic impedance generated by different gases trigger different acoustic attenuation, and can achieve wide-range (0-100 v/v%) gas monitoring, with ultra-fast response and recovery speeds reaching sub-second levels (t₉₀ < 1

SUBMITTER: Cui B 

PROVIDER: S-EPMC11787289 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature