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首页> 外文期刊>ACS applied materials & interfaces >Growth of a Large-Area, Free-Standing, Highly Conductive and Fully Foldable Silver Film with Inverted Pyramids for Wearable Electronics Applications
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Growth of a Large-Area, Free-Standing, Highly Conductive and Fully Foldable Silver Film with Inverted Pyramids for Wearable Electronics Applications

机译：具有可穿戴电子产品应用的倒金字塔的大面积，独立式，高度导电和完全可折叠银膜的生长

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摘要

A promising new concept is the application of flexible and foldable conductive film or paper for wearable electronics, in which silver nanowires, carbon nanotubes, and graphene are primarily used as conductive materials. However, their insufficient nanostructure contacts lead to poor electrical conductivity and mechanical fracture. Here, we demonstrate a simple and innovative strategy for fabricating a free-standing silver film with inverted pyramids by replicating pyramids on a textured silicon wafer under a hydrothermal reaction. In this unique structure, the inverted pyramids on the film surface can provide sufficient buffer space for a mechanically foldable and unfoldable cushion, and the continuous film ensures an uninterrupted electron transport pathway. As a result, the silver film with inverted pyramids can exhibit extremely high conductivity, with a sheet resistance as low as 2.55 x 10(-3) Omega/sq, corresponding to an electrical conductivity of 4.2 x 10(5) S cm(-1) for a 9.2-mu m-thick film (67.7% of bulk silver's conductivity). Surprisingly, this film has outstanding mechanical folding stability, with less than a 0.5% deviation from the initial resistance after 35,000 repetitive folding and unfolding cycles when tested at the folding site. The film is free-standing, thin, flexible, foldable, and suitable for cutting and patterned growth, which makes it suitable for wearable electronics, showing a much wider range of applications than substrate-based ones.
机译：一个有希望的新概念是应用柔性和可折叠的导电膜或纸张用于可穿戴电子器件，其中银纳米线，碳纳米管和石墨烯主要用作导电材料。然而，它们不足的纳米结构接触导致导电性差和机械骨折。在这里，我们证明了一种简单而创新的策略，用于通过在水热反应下复制织地用硅晶片上的金字塔来制造具有倒金字塔的独立银膜。在这种独特的结构中，膜表面上的倒金字塔可以为机械可折叠和脱褶垫提供足够的缓冲空间，并且连续膜确保不间断的电子传输路径。结果，具有倒置金字塔的银膜可以表现出极高的导电性，薄层电阻低至2.55×10（3）ω/ Sq，对应于4.2×10（5）厘米的电导率（ - 1）对于9.2-mu m厚的薄膜（散装银的67.7％）。令人惊讶的是，该薄膜具有出色的机械折叠稳定性，在折叠部位测试时，在35,000重复折叠和展开循环后偏离初始阻力小于0.5％。该薄膜采用独立式，薄，柔性，可折叠，适用于切割和图案化的增长，使其适用于可穿戴电子产品，显示比基础基底的更广泛的应用范围。

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  • 作者

    Yu Xiao; Li Zihua; Liu Yong; Zhao Wenxia; Xu Ruimei; Wang Donghai; Shen Hui;

  • 作者单位

    Sun Yat Sen Univ State Key Lab Optoelect Mat &

    Technol Sch Mat Sci &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ State Key Lab Optoelect Mat &

    Technol Sch Mat Sci &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ State Key Lab Optoelect Mat &

    Technol Sch Mat Sci &

    Engn Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Instrumental Anal &

    Res Ctr Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Instrumental Anal &

    Res Ctr Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Inst Solar Energy Syst Guangzhou 510275 Guangdong Peoples R China;

    Sun Yat Sen Univ Inst Solar Energy Syst Guangzhou 510275 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    wearable electronics; shape conformability; silver film; smart electronic textile; hydrothermal reaction;

    机译：可穿戴电子;形状符合性;银膜;智能电子纺织;水热反应;

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