Skin-conformal PMN-PT ultrasonic sensor for cuffless blood pressure sensing via eutectic solder integration.

ABSTRACT: Wearable ultrasonic systems are emerging as promising tools for noninvasive cardiovascular monitoring, enabling the real-time assessment of vascular dynamics without the need for cuff-based measurements. However, the integration of high-performance piezoelectric materials into flexible, skin-conformal arrays poses challenges in terms of mechanical stretchability, acoustic fidelity, and scalability. In this study, we present a flexible 5 × 4 ultrasonic transducer array (UTA) based on 1-3 lead magnesium niobate-lead titanate (PMN-PT) composite elements for continuous blood pressure monitoring. To achieve reliable integration, we employed a dual-sided eutectic solder bonding method using an Sn-Bi alloy to ensure low-temperature attachment without depolarization. The fabricated UTA operates at

SUBMITTER: Zaidi STH 

PROVIDER: S-EPMC12756301 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature