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Size-dependent fracture behavior of silver nanowires

机译：银纳米线的尺寸依赖性断裂行为

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摘要

Silver (Ag) nanowires have great potential to be used in the flexible electronics industry for their applications in flexible, transparent conductors due to high conductivity and light reflectivity. Those applications always involve mechanical loading and deformations, which requires an indepth understanding of their mechanical behavior and performance under loadings. However, current understanding on the mechanical properties of Ag nanowires is limited, especially on their size-dependent fracture behavior. In this work, mechanical properties of Ag nanowires with diameters ranging from 50 to 300 nm were systematically studied by in situ TEM tensile testing for the first time. The size effect was clearly found, with the increasing of the diameter of Ag nanowires, the ultimate tensile stress decreased. More importantly, the fracture behavior of Ag nanowire was studied and a brittle-to-ductile transition in fracture behavior was observed at the diameters around 100 nm which could be attributed to the dislocation activities within the geometry confinement. This work could give insights for understanding nanosized Ag wires and the design of Ag nanowire-based flexible devices and touchable panels.
机译：银色（AG）纳米线具有由于高导电率和光反射率的柔性透明导体中的应用而有很大的潜力。这些应用始终涉及机械负载和变形，这需要不对载荷下的机械行为和性能的深入了解。然而，目前对Ag纳米线的机械性能的了解是有限的，特别是在其依赖于依赖性骨折行为上。在这项工作中，通过第一次原位TEM拉伸测试系统地研究了直径为50至300nm的AG纳米线的机械性能。清楚地发现尺寸效果，随着Ag纳米线的直径的增加，最终拉伸应力降低。更重要的是，研究了Ag纳米线的断裂行为，并且在大约100nm的直径下观察到骨折行为中的脆性 - 延展性转变，其可归因于几何禁闭内的位错活动。这项工作可以为了解纳米化AG线和Ag基于AG的基于AG的柔性装置和可触摸面板的设计提供见解。

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  • 来源
    《Nanotechnology》 |2018年第29期|共7页
  • 作者

    Cao Ke; Han Ying; Zhang Hongti; Gao Libo; Yang Hongwei; Chen Jialin; Li Yuxiu; Lu Yang;

  • 作者单位

    City Univ Hong Kong Dept Mech &

    Biomed Engn Kowloon Hong Kong Peoples R China;

    City Univ Hong Kong Dept Mech &

    Biomed Engn Kowloon Hong Kong Peoples R China;

    City Univ Hong Kong Dept Mech &

    Biomed Engn Kowloon Hong Kong Peoples R China;

    City Univ Hong Kong Dept Mech &

    Biomed Engn Kowloon Hong Kong Peoples R China;

    Kunming Inst Precious Met State Key Lab Adv Technol Comprehens Utilizat Pla Kunming 650106 Yunnan Peoples R China;

    Kunming Inst Precious Met State Key Lab Adv Technol Comprehens Utilizat Pla Kunming 650106 Yunnan Peoples R China;

    Kunming Inst Precious Met State Key Lab Adv Technol Comprehens Utilizat Pla Kunming 650106 Yunnan Peoples R China;

    City Univ Hong Kong Dept Mech &

    Biomed Engn Kowloon Hong Kong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    Ag nanowire; in situ TEM; tensile testing; size effect; fracture;

    机译：AG纳米线;原位TEM;拉伸试验;尺寸效果;骨折;

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