Flexible wearable strain sensors have received extensive attention in human–computer interaction, soft robotics, and human health monitoring. Despite significant efforts in developing stretchable electronic materials and structures, developing flexible strain sensors with stable interfaces and low hysteresis remains a challenge. Herein, Ti₃C₂T_x MXene/AgNWs/liquid metal strain sensors (MAL strain sensor) with self-healing function are developed by exploiting the strong interactions between Ti₃C₂T_x MXene/AgNWs/LM and the disulfide and hydrogen bonds inside the self-healing poly(dimethylsiloxane) elastomers. AgNWs lap the Ti₃C₂T_x MXene sheets, and the LM acts as a bridge to increase the lap between Ti₃C₂T_x MXene and AgNWs, thereby improving the interface interaction between them and reducing hysteresis. The MAL strain sensor can simultaneously achieve high sensitivity (gauge factor for up to 3.22), high linearity (R² = 0.98157), a wide range of detection (e.g., 1%–300%), a fast response time (145 ms), excellent repeatability, and stability.In addition, the MAL strain sensor before and after self-healing is combined with a small fish and an electrothermally driven soft robot, respectively, allowing real-time monitoring of the swinging tail of the small fish and the crawling of the soft robot by resistance changes.

中文翻译：

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由动态二硫键和氢键调制的高线性度、低滞后 Ti3C2Tx MXene/AgNW/液态金属自愈应变传感器

柔性可穿戴应变传感器在人机交互、软机器人和人体健康监测领域受到广泛关注。尽管在开发可拉伸电子材料和结构方面付出了巨大努力，但开发具有稳定界面和低磁滞的柔性应变传感器仍然是一个挑战。本文利用Ti ₃ C ₂ T _x MXene/AgNWs/LM与二硫化物和氢之间的强相互作用，开发了具有自愈功能的Ti ₃ C ₂ T _x MXene/AgNWs/液态金属应变传感器（MAL应变传感器）自修复聚（二甲基硅氧烷）弹性体内部的键。AgNW 重叠 Ti ₃ C ₂ T_x MXene片材，LM充当桥梁，增加Ti ₃ C ₂ T _x MXene和AgNW之间的搭接，从而改善它们之间的界面相互作用并减少滞后。MAL应变传感器可以同时实现高灵敏度（应变系数高达3.22）、高线性度（ R ² = 0.98157）、宽检测范围（例如1%–300%）、快速响应时间（145 ms）此外，自愈前后的MAL应变传感器分别与小鱼和电热驱动的软体机器人结合，可以实时监测小鱼的尾巴摆动和小鱼的摆动情况。软体机器人通过阻力变化进行爬行。