Multifunctional modular electrospun fiber with heterogenous structure for multimodal sensing

The flexible sensors have progressed rapidly to achieve skin-like multisensory capabilities. However, the performance of flexible devices is compromised by strain disturbances and multi-parameter interactions, impeding their widespread deployment. Herein, we report a flexible fibrous device with a remarkably patterned structure featuring anti-strain interference, dual-parameter measurement and static/dynamic detection. The patterned cellular fibrous structure achieved a heterogenous strain distribution to preserve the sensing performance under 10% strain. The sensor utilized a piezoresistive component for low-frequency mechanical stimuli, while the thermoelectric response for calibrating temperature-induced resistance changes. Then, the hybrid piezoresistive/piezoelectric sensing platform was experimentally implemented for static pressure persistence and high-frequency acoustic excitation from 0 to 300 Hz. The hybrid tactile sensing achieved the highest material identification accuracy of 98.6%. This work provides valuable proposals to resolve practical constraints in flexible sensor applications, compelling advantages for broader wearable integration.