A Microfiber‐Reinforced Janus Hydrogel E‐Skin With Recyclable Feature for Multimodal Sensing and Gender‐Specific Physiological Monitoring

ABSTRACT Hydrogel‐based wearable electronics hold great promise for physiological monitoring, yet their application in privacy‐sensitive regions remains constrained by the simultaneous demands of ultrathin form factors, mechanical robustness, multimodal sensing, and long‐term stability. Inspired by dragonfly wings, this study develops a gelatin hydrogel e‐skin reinforced with polyurethane (PU) microfibers, featuring ultra‐thinness (7.15 µm), high strength (55.62 MJ m −3 ), and high sensitivity (GF = 2.52, TCR = 3.5%°C −1 ). Its controlled binary heterogeneous structure ensures asymmetric adhesion and long‐term skin conformability. A deep eutectic solvents (DES)‐induced ion‐electron dual‐conducting system enhances conductivity by 13 times while improving flexibility, thereby boosting sensing performance. This sensor boasts biocompatibility, antibacterial properties, transparency, freeze resistance and recyclability. It enables high‐precision continuous monitoring and achieves multimodal signal decoupling via finite element design. Integrated with flexible circuits and wireless modules, it supports non‐invasive at‐home tracking of privacy signals during pregnancy and erectile function. This work offers an intelligent solution for high‐precision monitoring in precision and personalized healthcare.