The control of coalescence and motion of droplets play a significant role in advanced technology and our daily life, and one of the most important approaches is surface design. Here, the microtextured surfaces decorated with wrinkled substrates are designed and studied for coalescence behaviors. The simulation results show that the coalescence speed would be slower on such surfaces due to the downward movement of the droplets induced by the penetration of atoms into the grooves that delays their movement along the coalescence direction, which is considered as a restriction effect. With the increase of the angles and the interval distance of wrinkled structures, the coalescence time becomes longer and the coalescing process becomes unfavorable, resulting from the enhanced restriction effect. More importantly, a composite substrate possessing the original and sub-wrinkled structures has been designed to tune the coalescence dynamics. The results of this work may not only help shed light on understanding the coalescence behaviors on the wrinkled substrates but also propose a feasible method for controlling the liquid coalescence behavior, which is expected to provide some useful implications for practical applications.

中文翻译：

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纳米液滴在装饰有精心设计的皱纹纳米结构的纹理表面上的可控聚结动力学：分子动力学研究

液滴聚结和运动的控制在先进技术和我们的日常生活中发挥着重要作用，其中最重要的方法之一是表面设计。在这里，设计并研究了装饰有皱纹基材的微纹理表面的聚结行为。模拟结果表明，由于原子渗透到凹槽中引起液滴的向下运动，从而延迟了它们沿聚结方向的运动，这被认为是一种限制效应，因此在这种表面上的聚结速度会较慢。随着褶皱结构的角度和间隔距离的增加，聚结时间变长，聚结过程变得不利，这是由于限制作用增强。更重要的是，具有原始和亚皱纹结构的复合基材已被设计用于调整聚结动力学。这项工作的结果不仅有助于理解起皱基材上的聚结行为，而且还提出了一种控制液体聚结行为的可行方法，有望为实际应用提供一些有用的启示。