Triple-electrode self-decoupled bimodal sensor with synchronized high-fidelity spatial localization and wide-range...

Flexible sensors capable of simultaneously identifying the location and magnitude of external stimuli is of great significance for intelligent grasping and human-machine interaction. However, achieving multimodal decoupled sensing remains challenging due to the inherent trade-off between signal decoupling and functional integration in sensor structure design, along with the difficulty of realizing a broad pressure detection range. In this work, a simple three-electrode stacked integrated structure is proposed, which effectively suppresses signal crosstalk between sensing channels. By incorporating a highly conductive continuous sensing layer, the sensor achieves excellent linearity (R²>0.99) and continuous spatial localization capability. Furthermore, the introduction of a graphene oxide (GO)-modified piezoelectric layer imparts superior pressure sensing performance, enabling a wide detection range of 2.663 kPa ∼ 445 kPa, with a linearity of R²=0.919 and a response time of 111 ms. The proposed sensor enables synchronous perception of gripping force and contact position, ensuring grasping stability and demonstrating promising applicability under low-light or fully dark conditions.