Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Collaborative Innovation Center for Eco-Textiles of Shandong Province, Qingdao University, Qingdao, Shandong 266071, P.R. China.
School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, Guangdong 518060, P.R. China.
Nano Lett. 2022 Jan 26;22(2):740-750. doi: 10.1021/acs.nanolett.1c04185. Epub 2022 Jan 12.
Flexible transparent electrodes demand high transparency, low sheet resistance, as well as excellent mechanical flexibility simultaneously, however they still remain to be a great challenge due to"trade-off" effect. Herein, inspired by a hollow interconnected leaf vein, we developed robust transparent conductive mesh with biomimetic interwoven structure via hierarchically self-assembles silver nanowires interwoven metal carbide/nitride (MXene) sheets along directional microfibers. Strong interfacial interactions between plant fibers and conductive units facilitate hierarchically interwoven conductive mesh constructed orderly on flexible and lightweight veins while maintaining high transparency, effectively avoiding the trade-off effect between optoelectronic properties. The flexible transparent electrodes exhibit sheet resistance of 0.5 Ω sq and transparency of 81.6%, with a remarkably high figure of merit of 3523. In addition, invisible camouflage sensors are further successfully developed as a proof of concept that could monitor human body motion signals in an imperceptible state. The flexible transparent conductive mesh holds great potential in high-performance wearable optoelectronics and camouflage electronics.
柔性透明电极需要同时具备高透明度、低方阻以及出色的机械柔韧性，但由于“权衡”效应，它们仍然是一个巨大的挑战。在此，受中空互联叶脉的启发，我们通过沿着定向微纤维自组装银纳米线交织的金属碳化物/氮化物（MXene）片，开发出具有仿生交织结构的坚固透明导电网。植物纤维和导电单元之间的强界面相互作用有助于在柔性和轻质叶脉上有序构建分层交织的导电网，同时保持高透明度，有效地避免了光电性能之间的权衡效应。柔性透明电极的方阻为 0.5 Ω/sq，透光率为 81.6%，其性能显著，优值高达 3523。此外，进一步成功开发了隐形伪装传感器作为一个概念验证，可在不可察觉的状态下监测人体运动信号。这种柔性透明导电网在高性能可穿戴光电学和伪装电子学方面具有巨大的潜力。
