液滴在梯度表面上的双向运动
Bidirectional Motion of Droplets on Gradient Liquid Infused Surfaces
摘要：
我们证明了自发的双向运动的液滴在液体注入的表面上的存在下的地形梯度，其中液滴可以移动到更密集或更稀疏的固体部分区域。我们的分析理论解释了这种双向运动的起源。此外，使用格子玻尔兹曼模拟和实验，我们表明，决定运动方向的关键因素是固体表面上的液滴和润滑油膜上的润湿性差异。示出了液滴和润滑剂的各种组合以及不同形式的地形梯度的双向运动。
英文摘要：
We demonstrate spontaneous bidirectional motion of droplets on liquid infused surfaces in the presence of a topographical gradient, in which the droplets can move either toward the denser or the sparser solid fraction area. Our analytical theory explains the origin of this bidirectional motion. Furthermore, using both lattice Boltzmann simulations and experiments, we show that the key factor determining the direction of motion is the wettability difference of the droplet on the solid surface and on the lubricant film. The bidirectional motion is shown for various combinations of droplets and lubricants, as well as for different forms of topographical gradients.
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