Abstract A porous structure based on a solution-based approach is highly desired for electrodes in flexible electronics due to the requirements of efficient electron and mass transfer. However, such a structure is largely unexplored for MXene-based electrodes. Here, we developed a solution-based self-assembly system to produce a conductive film with a high void space. Using water evaporation-induced self-assembly, a dendritic-lamellar MXene/carbon nanotube/polyvinylpyrrolidone electrode with high flexibility was prepared. By printing this electrode on hemisphere bumps of natural rubber substrates, a tactile sensor was prepared using face-to-face contacting of the hemisphere bumps. A detection limit of 0.69 Pa and a response time of ∼48 ms were obtained for the sensor, which were demonstrated for voice recognition and pulse measurement. An artificial skin realized a resolution of n2 using 2n connection ports based on the printed MXene/SWCNT/PVP electrode. This solution-based self-assembly for construction of MXene-related composites can be applied to other two-dimensional nanomaterials.

中文翻译：

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用于可穿戴触觉传感器和人造皮肤的树枝状层状MXene/碳纳米管导电薄膜的自组装

摘要 由于对高效电子和传质的要求，柔性电子器件中的电极非常需要基于溶液方法的多孔结构。然而，对于基于 MXene 的电极，这种结构在很大程度上尚未得到探索。在这里，我们开发了一种基于溶液的自组装系统来生产具有高空隙空间的导电薄膜。使用水分蒸发诱导的自组装，制备了具有高柔韧性的树枝状层状MXene/碳纳米管/聚乙烯吡咯烷酮电极。通过在天然橡胶基板的半球凸起上印刷该电极，使用半球凸起的面对面接触制备了触觉传感器。该传感器的检测限为 0.69 Pa，响应时间为~48 ms，已用于语音识别和脉搏测量。人造皮肤使用基于印刷 MXene/SWCNT/PVP 电极的 2n 个连接端口实现了 n2 的分辨率。这种用于构建 MXene 相关复合材料的基于溶液的自组装可应用于其他二维纳米材料。