Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
AML and CNMM, Department of Engineering Mechanics, State Key Laboratory of Tribology, Tsinghua University, Beijing, 100084, China.
Angew Chem Int Ed Engl. 2016 Mar 18;55(13):4265-9. doi: 10.1002/anie.201600224. Epub 2016 Mar 1.
By introducing anisotropic micropatterns on a superhydrophobic surface, we demonstrate that water microdroplets can coalesce and leap over the surface spontaneously along a prescribed direction. This controlled behavior is attributed to anisotropic liquid-solid adhesion. An analysis relating the preferential leaping probability to the geometrical parameters of the system is presented with consistent experimental results. Surfaces with this rare quality demonstrate many unique characteristics, such as self-powered, and relatively long-distance transport of microdroplets by "relay" coalescence-induced leaping.
通过在超疏水表面引入各向异性的微图案，我们证明了微小的水滴可以沿着预定的方向自发地合并并跃过表面。这种可控的行为归因于各向异性的液体-固体附着力。我们提出了一个分析，将优先跳跃概率与系统的几何参数联系起来，并得到了一致的实验结果。具有这种罕见特性的表面展示了许多独特的特征，例如自驱动，以及通过“接力”合并诱导的跳跃实现微滴的相对远距离输送。
