Liu Yahua, Zhou Ling, Wang Xu, Chu Jiahui, Lu Chenguang, Feng Shile, Yuan Zichao
State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, P. R. China.
ACS Appl Mater Interfaces. 2025 Jul 2;17(26):38689-38695. doi: 10.1021/acsami.5c06118. Epub 2025 Jun 19.
Controllable droplet manipulation plays a crucial role in microfluidics, biomedicine, and energy harvesting. Despite significant advances, synchronously controlling multiple droplets on a monolayer surface or spatially dislocated surfaces remains challenging. Here, a droplet ultrasonic bowl (DUB) is developed to enable the multi-droplet manipulation on a spatial slippery liquid-infused surface. By leveraging multiple twin-trap ultrasonic fields and dynamically modulating their quantity and positions, the DUB achieves programmable manipulation of single and multiple droplets on a monolayer surface such as single droplet precise movement, synchronous position exchange of two droplets, and simultaneous transport of three droplets. Furthermore, the spatial reach of the twin trap allows for the synchronized manipulation of multiple droplets on double-layer surfaces as well as steady control of pendant droplets. These capabilities demonstrate the applications in intelligent droplet circuits, spatial chemical reactions, and obstacle avoidance, offering a promising strategy for contactless droplet manipulation.
可控液滴操纵在微流体、生物医学和能量收集领域发挥着关键作用。尽管取得了重大进展，但在单层表面或空间错位表面上同步控制多个液滴仍然具有挑战性。在此，开发了一种液滴超声碗（DUB），以实现对空间超滑液体注入表面上的多液滴操纵。通过利用多个双阱超声场并动态调制它们的数量和位置，DUB实现了对单层表面上单个和多个液滴的可编程操纵，如单液滴精确移动、两个液滴的同步位置交换以及三个液滴的同时传输。此外，双阱的空间作用范围允许对双层表面上的多个液滴进行同步操纵以及对悬垂液滴进行稳定控制。这些能力展示了在智能液滴电路、空间化学反应和避障方面的应用，为非接触式液滴操纵提供了一种有前景的策略。
