弹性毛细弯液面介导柔性固体表面相邻结构间的相互作用
Elastocapillary menisci mediate interaction of neighboring structures at the surface of a compliant solid
AI总结：
本文研究了柔性固体表面相邻微柱凸起间的弹性毛细相互作用，发现微柱底部形成的弯液面设定了相互作用距离，导致微柱变形并簇集形成有序图案。
摘要：
表面应力在柔性固体表面驱动长程弹性毛细相互作用，已有观察表明它能介导粒子间相互作用并改变液滴的输运。我们证明，这种弹性毛细相互作用产生于仅仅是柔性固体凸起部分的相邻结构之间。对于排列在间距 p 小于相互作用距离 p* 的方形晶格中的柔性微柱，微柱与其邻居的距离决定了它因表面应力而产生的变形程度：靠得近的微柱往往比相距较远的微柱更圆、更扁平。这种相互作用由在每个微柱底部形成的弹性毛细弯液面介导，它设定了相互作用距离，并导致相邻结构比相对孤立的结构变形更多。相邻微柱也会向彼此移动形成簇集，从而导致图案形成和有序畴的出现。
英文摘要：
Surface stress drives long-range elastocapillary interactions at the surface of compliant solids, where it has been observed to mediate interparticle interactions and to alter the transport of liquid drops. We show that such an elastocapillary interaction arises between neighboring structures that are simply protrusions of the compliant solid. For compliant micropillars arranged in a square lattice with spacing p less than an interaction distance p*, the distance of a pillar to its neighbors determines how much it deforms due to surface stress: pillars that are close together tend to be rounder and flatter than those that are far apart. The interaction is mediated by the formation of an elastocapillary meniscus at the base of each pillar, which sets the interaction distance and causes neighboring structures to deform more than those that are relatively isolated. Neighboring pillars also displace toward each other to form clusters, leading to the emergence of pattern formation and ordered domains.
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