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Title: Strategy to minimize bending strain interference for flexible acoustic wave sensing platform
Authors: Zhou, Jian
Ji, Zhangbin
Guo, Yihao
Liu, Yanghui
Zhuo, Fengling
Zheng, Yuanjin
Gu, Alex Yuandong
Fu, YongQing
Duan, Huigao
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Zhou, J., Ji, Z., Guo, Y., Liu, Y., Zhuo, F., Zheng, Y., Gu, A. Y., Fu, Y. & Duan, H. (2022). Strategy to minimize bending strain interference for flexible acoustic wave sensing platform. Npj Flexible Electronics, 6(1).
Journal: npj Flexible Electronics
Abstract: There are great concerns for sensing using flexible acoustic wave sensors and lab-on-a-chip, as mechanical strains will dramatically change the sensing signals (e.g., frequency) when they are bent during measurements. These strain-induced signal changes cannot be easily separated from those of real sensing signals (e.g., humidity, ultraviolet, or gas/biological molecules). Herein, we proposed a new strategy to minimize/eliminate the effects of mechanical bending strains by optimizing off-axis angles between the direction of bending deformation and propagation of acoustic waves on curved surfaces of layered piezoelectric film/flexible glass structure. This strategy has theoretically been proved by optimization of bending designs of off-axis angles and acoustically elastic effect. Proof-of-concept for humidity and ultraviolet-light sensing using flexible SAW devices with negligible interferences are achieved within a wide range of bending strains. This work provides the best solution for achieving high-performance flexible acoustic wave sensors under deformed/bending conditions.
ISSN: 2397-4621
DOI: 10.1038/s41528-022-00217-0
Schools: School of Electrical and Electronic Engineering 
Rights: © The Author(s) 2022. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://
Fulltext Permission: open
Fulltext Availability: With Fulltext
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