电介质上电润湿(EWOD),公认为最成功的电液滴驱动方法,在不同的应用中至关重要,从热管理到微流体和集水。尽管取得了重大进展,实现可重复性仍然具有挑战性,高速,在超疏水表面上基于EWOD的液滴操纵中,电路简单。此外,其有效操作通常需要电极阵列和复杂的电路控制。这里,我们报道了在轨道EWOD(OEW)超疏水表面上新观察到的液滴操纵现象。由于轨道上产生的不对称电润湿力,灵活和通用的液滴操纵促进OEW。我们证明了在超疏水表面上的OEW液滴操纵表现出更高的速度(快5倍),增强功能(反重力),和操纵不同的液体(酸,基地,盐,有机,例如,甲基蓝,人造血液)无污染,1000次试验后耐久性好。我们设想使用OEW的这种强大的液滴操纵策略将为涉及液滴的各种过程提供有价值的平台,从微流体设备到可控的化学反应。本研究中显示的先前未报道的液滴操纵现象和控制策略可能会升级基于EWOD的微流体,防雾,防冰,除尘,和超越。本文受版权保护。保留所有权利。
Electrowetting-on-dielectric (EWOD), recognized as the most successful electrical droplet actuation method, is essential in diverse applications, ranging from thermal management to microfluidics and water harvesting. Despite significant advances, it remains challenging to achieve repeatability, high speed, and simple circuitry in EWOD-based droplet manipulation on superhydrophobic surfaces. Moreover, its efficient operation typically requires electrode arrays and sophisticated circuit control. Here, a newly observed droplet manipulation phenomenon on superhydrophobic surfaces with orbital EWOD (OEW) is reported. Due to the asymmetric electrowetting force generated on the orbit, flexible and versatile droplet manipulation is facilitated with OEW. It is demonstrated that OEW droplet manipulation on superhydrophobic surfaces exhibits higher speed (up to 5 times faster), enhanced functionality (antigravity), and manipulation of diverse liquids (acid, base, salt, organic, e.g., methyl blue, artificial blood) without contamination, and good durability after 1000 tests. It is envisioned that this robust droplet manipulation strategy using OEW will provide a valuable platform for various processes involving droplets, spanning from microfluidic devices to controllable chemical reactions. The previously unreported droplet manipulation phenomenon and control strategy shown here can potentially upgrade EWOD-based microfluidics, antifogging, anti-icing, dust removal, and beyond.