Stretchability of thin metal films on elastomer substrates
Stretchability of thin metal films on elastomer substrates
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DOI：
10.1063/1.1806275
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发表时间：
2004-10-18
影响因子：
4
通讯作者：
Wagner, S
中科院分区：
文献类型：
--
作者：
Li, T;Huang, ZY;Wagner, S
许多柔性电子表面包括有机基板上的无机膜。刚性和柔性材料的这种集成结构的机械故障构成了重大挑战。这封信研究弹性体基板上的金属薄膜的拉伸性。我们的实验表明，当拉伸时，支撑金属膜在应变大于独立膜的应变时破裂。利用有限元程序模拟了金属薄膜的破裂过程。独立的金属膜通过形成单个颈部而破裂。相比之下，弹性体基底上的金属膜可在破裂之前形成颈部阵列。虽然预破裂颈部不会明显改变电导率，但它们会拉长金属膜，导致较大的总体破裂应变。(C)2004年，美国物理学会。
Many flexible electronic surfaces comprise inorganic films on organic substrates. Mechanical failure of such integrated structures of stiff and compliant materials poses a significant challenge. This letter studies the stretchability of metal films on elastomer substrates. Our experiment shows that, when stretched, elastomer-supported metal films rupture at strains larger than those reported for freestanding films. We use a finite element code to simulate the rupture process of metal films. A freestanding metal film ruptures by forming a single neck. By contrast, a metal film on an elastomer substrate may develop an array of necks before rupture. While the pre-rupture necks do not change the electrical conductance appreciably, they elongate the metal film, leading to a large overall rupture strain. (C) 2004 American Institute of Physics.