A kirigami approach to engineering elasticity in nanocomposites through patterned defects
A kirigami approach to engineering elasticity in nanocomposites through patterned defects
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DOI：
10.1038/nmat4327
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发表时间：
2015-08-01
期刊：
影响因子：
41.2
通讯作者：
Kotov, Nicholas A.
中科院分区：
文献类型：
--
作者：
Shyu, Terry C.;Damasceno, Pablo F.;Kotov, Nicholas A.
在纳米复合材料中赋予弹性和多功能性的努力主要集中在整合聚合物（1，2）和纳米级（3-5）组分上。然而，由于应变集中缺陷的随机出现和分布以及纳米级组件在高应变下的硬化，这种复合材料通常具有不可预测的应变-性能关系。在这里，通过从kirigami（日本剪纸艺术）中获得灵感，我们展示了通过自上而下的图案化技术在刚性纳米复合材料和其他复合材料片材中制成的缺口网络（6-8），可以防止不可预测的局部失效，并将片材的极限应变从4%增加到370%。我们还表明，片材的拉伸行为可以通过有限元建模准确地预测。此外，与其他可拉伸导体（3-5）形成鲜明对比的是，可拉伸kirigami片的电导在整个应变范围内保持不变，并且我们证明了它们用于调节等离子体放电现象。kirigami纳米复合材料作为等离子体电极的独特性能为可拉伸电子和光电器件以及其他应用可能性开辟了广泛的新技术解决方案。
Efforts to impart elasticity and multifunctionality in nanocomposites focus mainly on integrating polymeric(1,2) and nanoscale(3-5) components. Yet owing to the stochastic emergence and distribution of strain-concentrating defects and to the stiffening of nanoscale components at high strains, such composites often possess unpredictable strain-property relationships. Here, by taking inspiration from kirigami-the Japanese art of paper cutting-we show that a network of notches(6-8) made in rigid nanocomposite and other composite sheets by top-down patterning techniques prevents unpredictable local failure and increases the ultimate strain of the sheets from 4 to 370%. We also show that the sheets' tensile behaviour can be accurately predicted through finite-element modelling. Moreover, in marked contrast to other stretchable conductors(3-5), the electrical conductance of the stretchable kirigami sheets is maintained over the entire strain regime, and we demonstrate their use to tune plasma-discharge phenomena. The unique properties of kirigami nanocomposites as plasma electrodes open up a wide range of novel technological solutions for stretchable electronics and optoelectronic devices, among other application possibilities.