Time-Dependent Pinning of Nanoblisters Confined by Two-Dimensional Sheets. Part 1: Scaling Law and Hydrostatic Pressure
Time-Dependent Pinning of Nanoblisters Confined by Two-Dimensional Sheets. Part 1: Scaling Law and Hydrostatic Pressure
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DOI：
10.1021/acs.langmuir.2c02837
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发表时间：
2023-01-03
期刊：
影响因子：
3.9
通讯作者：
Chu, Jiaru
中科院分区：
文献类型：
--
作者：
Ma, Chengfu;Chen, Yuhang;Chu, Jiaru
了解气泡的力学对于研究二维（2D）材料非常重要，其中纳米级气泡经常出现在其异质结构中。它还有助于理解一种新型的部分湿润现象，即弹性湿润，其中液滴被薄膜限制。在这两部分的工作中，我们研究了静态力学的纳米级水泡之间的二维弹性片和基板（第1部分），以及他们的钉扎/脱钉动力学（第2部分）。第一部分利用原子力显微镜（AFM）测量和理论分析研究了气泡的形态特征和静水压力。的形态特征的水泡被证明是相互作用的结果的弹性的封盖片，封盖片和基板之间的粘附力，和界面张力。在实验中观察到的水泡的普遍标度律。我们的分析表明，水泡内的静水压力可以估计从他们的形态特征。这种估计的可靠性验证了AFM压痕测量的静水压力的各种水泡。
Understanding the mechanics of blisters is important for studying two-dimensional (2D) materials, where nanoscale blisters appear frequently in their heterostructures. It also benefits the understanding of a novel partial wetting phenomenon known as elastic wetting, where droplets are confined by thin films. In this two-part work, we study the static mechanics of nanoscale blisters confined between a 2D elastic sheet and its substrate (part 1) as well as their pinning/depinning dynamics (part 2). Here, in part 1, we investigate the morphology characteristics and hydrostatic pressures of the blisters by using atomic force microscopy (AFM) measure-ments and theoretical analysis. The morphology characteristics of the blisters are shown to be the interplay results of the elasticity of the capping sheet, the adhesion between the capping sheet and the substrate, and the interfacial tensions. A universal scaling law is observed for the blisters in the experiments. Our analyses show that the hydrostatic pressures inside the blisters can be estimated from their morphology characteristics. The reliability of such an estimation is verified by AFM indentation measurements of the hydrostatic pressures of a variety of blisters.