Dual-Graded Microstructure Engineering for Flexible Piezoresistive Sensors with High Sensitivity and Broad Linear Range in Physiological Monitoring.

ABSTRACT: Flexible piezoresistive sensors that offer both high sensitivity and a broad linear detection range are highly desirable for wearable health monitoring, as they facilitate simplified circuit design and enable accurate detection of subtle physiological signals. However, existing sensors typically encounter an intrinsic trade-off between sensitivity and linearity, primarily due to structural stiffening under increasing pressure. Here, a flexible piezoresistive pressure sensor featuring dual-graded microstructures (DGM) is reported, formed by embedding multi-walled carbon nanotubes (MWCNTs) into a thermoplastic polyurethane matrix. Leveraging the synergistic effects of progressive structural deformation and MWCNTs-induced tunneling conduction, the sensor achieves a high sensitivity of 69.8 kP

SUBMITTER: Bai N 

PROVIDER: S-EPMC12520465 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature