Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China.
Nat Commun. 2022 Oct 29;13(1):6472. doi: 10.1038/s41467-022-34168-x.
The development of flexible thermistor epidermal electronics (FTEE) to satisfy high temperature resolution without strain induced signal distortion is of great significance but still challenging. Inspired by the nacre microstructure capable of restraining the stress concentration, we exemplify a versatile MXene-based thermistor elastomer sensor (TES) platform that significantly alleviates the strain interference by the biomimetic laminated strategy combining with the in-plane stress dissipation and nacre-mimetic hierarchical architecture, delivering competitive advantages of superior thermosensitivity (-1.32% °C), outstanding temperature resolution (~0.3 °C), and unparalleled mechanical durability (20000 folding fatigue cycles), together with considerable improvement in strain-tolerant thermosensation over commercial thermocouple in exercise scenario. By a combination of theoretical model simulation, microstructure observation, and superposed signal detection, the authors further reveal the underlying temperature and strain signal decoupling mechanism that substantiate the generality and customizability of the nacre-mimetic strategy, possessing insightful significance of fabricating FTEE for static and dynamic temperature detection.
开发具有高分辨率且不受应变引起的信号失真影响的柔性热敏电阻表皮电子器件（FTEE）具有重要意义，但仍具有挑战性。受能够抑制应力集中的珍珠母微观结构的启发，我们举例说明了一种基于 MXene 的热敏电阻弹性体传感器（TES）平台，该平台通过仿生层压策略结合平面内应力耗散和珍珠母样分层结构，显著减轻了应变干扰，具有卓越的热敏性（-1.32% °C）、出色的温度分辨率（~0.3 °C）和无与伦比的机械耐久性（20000 次折叠疲劳循环），以及在运动场景中相对于商用热电偶在应变容限热敏传感方面的显著提高。通过理论模型模拟、微观结构观察和叠加信号检测的组合，作者进一步揭示了温度和应变信号解耦的内在机制，证实了珍珠母样策略的通用性和可定制性，为静态和动态温度检测制造 FTEE 具有重要意义。
