Xiong Jiaqing, Li Shaohui, Ye Yiyang, Wang Jiangxin, Qian Kai, Cui Peng, Gao Dace, Lin Meng-Fang, Chen Tupei, Lee Pooi See
School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Adv Mater. 2018 Jul 13:e1802803. doi: 10.1002/adma.201802803.
Huge challenges remain regarding the facile fabrication of neat metallic nanowires mesh for high-quality transparent conductors (TCs). Here, a scalable metallic nanowires bundle micromesh is achieved readily by a spray-assisted self-assembly process, resulting in a conducting mesh with controllable ring size (4-45 µm) that can be easily realized on optional polymer substrates, rendering it transferable to various deformable and transparent substrates. The resultant conductors with the embedded nanowires bundle micromesh deliver superior and customizable optoelectronic performances, and can sustain various mechanical deformations, environmental exposure, and severe washing, exhibiting feasibility for large-scale manufacturing. The silver nanowires bundle micromesh with explicit conductive paths is embedded into an ethyl cellulose (EC) transparent substrate to achieve superior optoelectronic properties endowed by a low amount of incorporated nanowires, which leads to reduced extinction cross-section as verified by optical simulation. A representative EC conductor with a low sheet resistance of 25 Ω □ , ultrahigh transmittance of 97%, and low haze of 2.6% is attained, with extreme deformability (internal bending radius of 5 µm) and waterproofing properties, opening up new possibilities for low-cost and scalable TCs to replace indium-tin oxide (ITO) for future flexible electronics, as demonstrated in a capacitive touch panel in this work.
在轻松制造用于高质量透明导体（TCs）的纯金属纳米线网格方面，仍然存在巨大挑战。在此，通过喷雾辅助自组装工艺轻松实现了可扩展的金属纳米线束微网格，从而得到一种具有可控环尺寸（4 - 45微米）的导电网格，该网格可在任意聚合物基板上轻松实现，使其能够转移到各种可变形和透明的基板上。所得的具有嵌入式纳米线束微网格的导体具有卓越且可定制的光电性能，并且能够承受各种机械变形、环境暴露和强力清洗，展现出大规模制造的可行性。具有明确导电路径的银纳米线束微网格被嵌入乙基纤维素（EC）透明基板中，以通过少量掺入的纳米线实现卓越的光电性能，经光学模拟验证，这导致消光截面减小。获得了一种具有代表性的EC导体，其方阻低至25Ω□，透过率高达97%，雾度低至2.6%，具有极高的可变形性（内弯曲半径为5微米）和防水性能，为低成本且可扩展的TCs开辟了新的可能性，以取代氧化铟锡（ITO）用于未来的柔性电子产品，如本工作中在电容式触摸面板中所展示的那样。
