蒸发诱导自组装超薄 AgNW 网络,用于高适配性可穿戴电子设备

IF 12.3 1区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC npj Flexible Electronics Pub Date : 2024-05-07 DOI:10.1038/s41528-024-00314-2
Chu Qin, Qingyin Sun, Yu Chen, Shah Fahad, Jiaxin Wu, Yuxuan Dong, Hongyu Yu, Min Wang
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引用次数: 0

摘要

透明电极的柔韧性和稳定性对柔性设备,尤其是潜在的可穿戴电子设备的日益普及起着至关重要的作用。迄今为止,已开发出多种溶液涂层技术用于制造银纳米线(AgNW)柔性生物电子器件。然而,如何实现银纳米线的有序分布而不产生不良聚集仍然是一个巨大的挑战。本文提出了一种通过蒸发诱导自组装在独立电纺 PVDF-TrFE 框架上实现规则图案化超薄 AgNW 网络的方法。通过实验和理论分析,研究了蒸发AgNW胶体悬浮液的图案化机理。探讨了蒸发诱导胶体独立膜内部流动对形成规则方孔阵列、AgNW 选择性沉积以及沿人工针阵列排列的影响。由于 AgNW 网络的有序排列,所得到的柔性电极实现了超薄厚度(约 5 μm)、高透光率(87.8%)和低薄片电阻(8.4 Ω-sq-1),而 AgNW 的用量相对较少(9 μg-cm-2)。该电极在循环弯曲(50,000 次)和拉伸(50% 应变)过程中表现出卓越的耐久性。在日常环境中使用 200 天后,其电阻值几乎保持不变。此外,附着在人体皮肤上的柔性透明电极具有极佳的保形性和透气性,这表明它具有作为电子皮肤传感器的应用潜力。我们的研究结果有力地推动了一种简单的方法,即通过 AgNW 的自组装,以有效的模式为高度保形的可穿戴电子产品强调更好的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Evaporation-induced self-assembled ultrathin AgNW networks for highly conformable wearable electronics
The flexibility and stability of transparent electrodes play a crucial role in the growing popularity of flexible devices, especially in potential wearable electronics. To date, various solution-coating techniques have been developed for fabricating silver nanowire (AgNW) flexible bioelectronics. However, achieving the orderly distributed patterns of AgNW without undesirable aggregations still poses a grand challenge. Here, an approach to realize regular patterned ultrathin AgNW networks on a freestanding electrospun PVDF-TrFE frame by evaporation-induced self-assembly is proposed. The patterning mechanism of evaporating AgNW colloidal suspension is investigated from experimental and theoretical analysis. The influence of evaporation-induced flow inside colloidal freestanding membranes on forming regular square hole-shaped arrays, selective deposition of AgNW, and aligning them along the artificial pinning array are addressed. Owing to the orderly arrangement of AgNW networks, the resultant flexible electrode achieves ultrathin thickness (about 5 μm), high optical transmittance (87.8%), and low sheet resistance (8.4 Ω·sq−1) with a relatively low dosage of AgNW (9 μg·cm−2). The electrode exhibits excellent durability during cyclic bending (50,000 times) and stretching (50% strain). The resistance remains virtually unchanged during 200 days in everyday environments. Furthermore, the excellent conformability and breathability of the flexible transparent electrode attached to the human skin demonstrates its potential application as an e-skin sensor. Our findings reliably urge a simple approach to underscore better outcomes with effective patterns by self-assembly of AgNW for highly conformal wearable electronics.
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来源期刊
CiteScore
17.10
自引率
4.80%
发文量
91
审稿时长
6 weeks
期刊介绍: npj Flexible Electronics is an online-only and open access journal, which publishes high-quality papers related to flexible electronic systems, including plastic electronics and emerging materials, new device design and fabrication technologies, and applications.
期刊最新文献
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