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Hierarchy of nanoscale graphene wrinkles on compliant substrate: Theory and experiment
Extreme Mechanics Letters ( IF 4.7 ) Pub Date : 2020-08-22 , DOI: 10.1016/j.eml.2020.100948
Charalampos Androulidakis , Emmanuel N. Koukaras , Krishna Sampathkumar , Jaroslava Rahova , Costas Galiotis , Otakar Frank

Wrinklons, the transition zone where two wrinkles are merged to one, have been observed in various thin films across all scales. For suspended films the evolution of the wrinklon wavelength from the edge can be described by λxm, where m is universal. Herein we show experimentally that for graphene wrinklons on a compliant polymer, m is not universal, but varies with the graphene thickness. An analytical model is developed based on energy principles, which shows that the influence of the substrate has to be taken into account. The present analysis can be applied further in all thin films on substrate and provides significant physical insight for the wrinklon phenomenology.



中文翻译:

顺应性基底上纳米级石墨烯皱纹的层次结构:理论与实验

在所有尺度的各种薄膜中都观察到了皱纹,这是两个皱纹合并为一个的过渡区域。对于悬浮膜,皱纹波长从边缘的演变可以描述为λX,在哪里 是普遍的。在这里,我们通过实验表明,对于顺应性聚合物上的石墨烯皱纹,这不是通用的,但会随石墨烯的厚度而变化。基于能量原理开发了一个分析模型,该模型表明必须考虑基材的影响。本分析可进一步应用于基底上的所有薄膜,并为皱纹现象学提供重要的物理见解。

更新日期:2020-08-22
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