在拉力,压力和循环负荷下支持的五倍双联银纳米线的变形和故障
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在PubMed上查看摘要
概括
此摘要是机器生成的。在聚合物上对银纳米线 (AgNW) 的机械测试显示了基板依赖的行为. 在PET上使用的AgNW会多次断裂,而在PDMS上使用的AgNW会一次滑动和断裂,从而影响灵活的电子性能.
科学领域
- 材料科学
- 纳米技术
- 机械工程
背景情况
- 由于其电,光学和机械特性,银纳米线 (AgNW) 网络是灵活透明导电极的关键.
- 低成本的印刷技术使AgNW在灵活的电子产品中具有大规模应用的潜力.
- 在聚合物基板的机械应力下了解个体的AgNW行为对于设备的可靠性至关重要.
研究的目的
- 在现场拉伸试验中研究分离的AgNW在不同聚合物基板 (PET和PDMS) 上的机械反应.
- 阐明基板类型和纳米线方向对变形,断裂和粘附的影响.
- 在压力负荷下描述塑性变形和疲劳行为.
主要方法
- 相关显微镜结合光学和电子显微镜,用于在PET和PDMS上的AgNW的现场拉伸测试.
- 对聚合物的拉力轴的AgNW方向的控制变化,以诱导拉力或压力.
- 使用电子显微镜分析变形机制,断裂模式和粘附效应.
主要成果
- 基板类型显著影响AgNW变形和断裂;PET上的电线多次断裂,而PDMS上的电线呈现单次断裂和滑动.
- 压缩测试显示在两种基板上的AgNW中通过扭曲和新的粒度边界形成局部塑性变形.
- 新形成的粒度边界在循环压缩过程中作为断裂点,而弹性变形可以在1000个循环内逆转.
结论
- AgNW和PET/PDMS基板之间的粘附强度差异是机械反应和故障模式的关键决定因素.
- 纳米线曲和粒度边界形成是压缩下的关键塑性变形机制.
- 了解这些纳米级机械行为对于设计使用AgNW的强大的灵活电子设备至关重要.
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