Lin Yong, Fang Ting, Bai Chong, Sun Yuping, Yang Cheng, Hu Gaohua, Guo Haorun, Qiu Weijie, Huang Weixi, Wang Lin, Tao Zihao, Lu Yan-Qing, Kong Desheng
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
State Key Laboratory of Analytical Chemistry for Life Science, and Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210023, China.
Nano Lett. 2023 Dec 13;23(23):11174-11183. doi: 10.1021/acs.nanolett.3c03670. Epub 2023 Dec 4.
Stretchable conductive nanocomposites are essential for deformable electronic devices. These conductors currently face significant limitations, such as insufficient deformability, significant resistance changes upon stretching, and drifted properties during cyclic deformations. To tackle these challenges, we present an electrically self-healing and ultrastretchable conductor in the form of bilayer silver nanowire/liquid metal microcapsule nanocomposites. These nanocomposites utilize silver nanowires to establish their initial excellent conductivity. When the silver nanowire networks crack during stretching, the microcapsules are ruptured to release the encased liquid metal for recovering the electrical properties. This self-healing capability allows the nanocomposite to achieve ultrahigh stretchability for both uniaxial and biaxial strains, minor changes in resistance during stretching, and stable resistance after repetitive deformations. The conductors have been used to create skin-attachable electronic patches and stretchable light-emitting diode arrays with enhanced robustness. These developments provide a bioinspired strategy to enhance the performance and durability of conductive nanocomposites.
可拉伸导电纳米复合材料对于可变形电子设备至关重要。目前这些导体面临着重大限制，例如可变形性不足、拉伸时电阻显著变化以及循环变形过程中性能漂移。为应对这些挑战，我们提出了一种双层银纳米线/液态金属微胶囊纳米复合材料形式的电自修复且超可拉伸导体。这些纳米复合材料利用银纳米线来建立其初始的优异导电性。当银纳米线网络在拉伸过程中破裂时，微胶囊会破裂以释放封装的液态金属来恢复电学性能。这种自修复能力使纳米复合材料在单轴和双轴应变下都能实现超高拉伸性、拉伸过程中电阻变化微小以及重复变形后电阻稳定。这些导体已被用于制造具有增强鲁棒性的可附着在皮肤上的电子贴片和可拉伸发光二极管阵列。这些进展提供了一种受生物启发的策略来提高导电纳米复合材料的性能和耐久性。
