Xin Ming, Li Jiean, Ma Zhong, Pan Lijia, Shi Yi
Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, China.
Front Chem. 2020 Apr 21;8:297. doi: 10.3389/fchem.2020.00297. eCollection 2020.
MXenes, a kind of two-dimensional material of early transition metal carbides and carbonitrides, have emerged as a unique class of layered-structured metallic materials with attractive features, as good conductivity comparable to metals, enhanced ionic conductivity, hydrophilic property derived from their hydroxyl or oxygen-terminated surfaces, and mechanical flexibility. With tunable etching methods, the morphology of MXenes can be effectively controlled to form nanoparticles, single layer, or multi-layer nanosheets, which exhibit large specific surface areas and is favorable for enhancing the sensing performance of MXenes based sensors. Moreover, MXenes are available to form composites with other materials facilely. With structure design, MXenes or its composite show enhanced mechanical flexibility and stretchability, which enabled its wide application in the fields of wearable sensors, energy storage, and electromagnetic shielding. In this review, recent progress in MXenes is summarized, focusing on its application in wearable sensors including pressure/strain sensing, biochemical sensing, temperature, and gas sensing. Furthermore, the main challenges and future research are also discussed.
MXenes是一种由早期过渡金属碳化物和碳氮化物组成的二维材料，已成为一类独特的具有吸引力特性的层状结构金属材料，具有与金属相当的良好导电性、增强的离子导电性、源自其羟基或氧端表面的亲水性以及机械柔韧性。通过可调蚀刻方法，可以有效控制MXenes的形态，形成纳米颗粒、单层或多层纳米片，这些纳米片具有大的比表面积，有利于提高基于MXenes的传感器的传感性能。此外，MXenes可以很容易地与其他材料形成复合材料。通过结构设计，MXenes或其复合材料表现出增强的机械柔韧性和拉伸性，这使其能够在可穿戴传感器、能量存储和电磁屏蔽等领域得到广泛应用。在这篇综述中，总结了MXenes的最新进展，重点关注其在可穿戴传感器中的应用，包括压力/应变传感、生化传感、温度传感和气体传感。此外，还讨论了主要挑战和未来研究方向。
