Self-propelled droplet transport on shaped-liquid surfaces
Self-propelled droplet transport on shaped-liquid surfaces
复制标题
DOI：
10.1038/s41598-020-70988-x
复制
发表时间：
2020-09-11
影响因子：
4.6
通讯作者：
Wells, Gary G.
中科院分区：
文献类型：
--
作者：
Launay, Gaby;Sadullah, Muhammad Subkhi;Wells, Gary G.
少量液体在固体表面上的运输对于微流体应用是基本的。允许控制液体液体在平坦表面上的技术通常涉及生成润湿性对比度。但是，这种方法受到液滴和固体之间直接接触引起的运动的阻力的限制。我们在这里表明，可以通过双重长度尺度微观结构和“液体表面”的概念来防止直接接触，从而大大降低这种电阻。这些新的表面使液滴沿定义的路径轻柔地运输，并且可以很好地控制其速度。此外，它们的较高粘附允许捕获撞击的液滴，并在雾收集和传热等应用中打开了新的可能性。
The transport of small amounts of liquids on solid surfaces is fundamental for microfluidics applications. Technologies allowing control of droplets of liquid on flat surfaces generally involve the generation of a wettability contrast. This approach is however limited by the resistance to motion caused by the direct contact between the droplet and the solid. We show here that this resistance can be drastically reduced by preventing direct contact with the help of dual-length scale micro-structures and the concept of "liquid-surfaces". These new surfaces allow the gentle transport of droplets along defined paths and with fine control of their speed. Moreover, their high adhesion permits the capture of impacting droplets, opening new possibilities in applications such as fog harvesting and heat transfer.