Strategy to minimize bending strain interference for flexible acoustic wave sensing platform

Abstract There are great concerns for sensing using flexible acoustic wave sensors and lab-on-a-chip, as mechanical strains will dramatically change the signals (e.g., frequency) when they bent during measurements. These strain-induced signal changes cannot be easily separated from those of real humidity, ultraviolet, or gas/biological molecules). Herein, we proposed a new strategy to minimize/eliminate effects bending by optimizing off-axis angles between direction deformation propagation waves on curved surfaces layered piezoelectric film/flexible glass structure. This has theoretically been proved optimization designs acoustically elastic effect. Proof-of-concept humidity ultraviolet-light SAW devices with negligible interferences achieved within wide range strains. work provides best solution achieving high-performance under deformed/bending conditions.