Time-Dependent Pinning of Nanoblisters Confined by Two-Dimensional Sheets. Part 2: Contact Line Pinning.
Time-Dependent Pinning of Nanoblisters Confined by Two-Dimensional Sheets. Part 2: Contact Line Pinning.
复制标题
二维片限制的纳米泡的时间依赖性钉扎。
DOI：
10.1021/acs.langmuir.2c03318
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发表时间：
2023
期刊：
影响因子：
3.9
通讯作者：
J. Chu
中科院分区：
文献类型：
--
作者：
Chengfu Ma;Yuhang Chen;J. Chu
液滴在固体表面的钉扎是一种普遍存在的润湿现象，引起了广泛的研究兴趣。与经典的润湿，钉扎效应在一个新的润湿问题，液滴被限制在基板上的弹性膜几乎没有被调查。在这里，我们的研究在一个附带的文件（第1部分）之间的二维弹性片和基板的纳米级水泡的静态力学，我们调查在这一部分的钉扎行为，这样的水泡使用原子力显微镜。泡罩的横向保持力被示出为几乎与它们的接触线成线性比例，并且在增加它们的静止时间时增加直到饱和。我们的分析揭示了在接触线的基板的微变形的机制。微变形的蠕变被发现会导致随时间变化的钉扎，这是由气泡在长时间的休息后扩散后留下的残留细脊结构所证明的。
Pinning of droplets on solids is an omnipresent wetting phenomenon that attracts intense research interest. Unlike in classical wetting, pinning effects in a novel wetting problem where droplets are confined onto the substrates by elastic films have hardly been investigated. Here, following our study in an accompanying paper (part 1) on the static mechanics of nanoscale blisters confined between a two-dimensional elastic sheet and its substrate, we investigate in this part the pinning behaviors of such blisters by using atomic force microscopy. The blisters' lateral retention forces are shown to scale almost linearly with their contact lines and to increase until saturation upon increasing their resting times. Our analysis reveals a mechanism of microdeformation of the substrate at the contact line. The creep of the microdeformation is found to cause the time-dependent pinning, which is evidenced by residual fine ridge structures left by blisters after their spread after long resting times.