Fabrication of Stretchable Piezoelectric Sensor with a Kirigami Design for Heart Sound Monitoring.

ABSTRACT: Heart sounds contain critical information about valve activity and hemodynamics, serving as an essential basis for cardiovascular disease diagnosis. However, traditional heart sound sensors are either rigid or flexible but non-stretchable, limiting their ability to accommodate chest deformation and leading to signal distortion. This study proposes an easy-to-fabricate, stretchable piezoelectric heart sound sensor with a Kirigami-inspired design, a five-layer "sandwich" structure. Periodic Kirigami cuts significantly enhance stretchability while maintaining piezoelectric conversion efficiency. Finite element simulations reveal the Kirigami structure is more sensitive to hinge length and thickness than to hinge width. Electrical tests demonstrate a linear response to sound pressure, with out

SUBMITTER: Zhang X 

PROVIDER: S-EPMC12694543 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature