A Highly Sensitive Capacitance Pressure Sensor With ZnO ‐ GO ‐ PVDF Dielectric Composite Layer for Wearable Applications

ABSTRACT Flexible pressure sensors play an increasingly important role in wearable electronics, particularly in areas such as healthcare monitoring, human–machine interaction, and motion detection. Despite significant progress, maintaining high sensitivity while ensuring stable performance over a broad pressure range remains a major challenge. To address this, the present work develops a flexible capacitance pressure sensor using a PVDF‐GO‐ZnO composite as the dielectric layer. Zinc oxide nanoparticles were synthesized through a solvothermal reflux method, and graphene oxide was prepared using the Modified Hummers' process. The composite layer was formed by spin‐coating PVDF incorporated with GO and ZnO, enabling a systematic evaluation of how these fillers influence the dielectric properties and sensing behavior. The resulting sensor shows excellent performance in the low‐pressure range (0–3 kPa), achieving a sensitivity of 2.73655 kPa −1 , response and recovery times (0.5 and 0.48 s), hysteresis (3.53%), and stable operation over 3500 s. These results highlight the device's robustness and suitability for wearable applications, particularly in health diagnostics, motion tracking, and speech‐based monitoring.