Jumping-droplet condensation, namely the out-of-plane jumping of condensed droplets upon coalescence, has been a promising technical innovation in the fields of energy harvesting, droplet manipulation, thermal management, etc., yet is limited owing to the challenge of enabling a sustainable and programmable control. Here, we characterized the morphological evolutions and dynamic behaviors of nanoscale condensates on different nanopillar surfaces, and found that there exists an unrevealed domino effect throughout the entire droplet lifecycle and the coalescence is not the only mechanism to access the droplet jumping. The vapor nucleation preferentially occurs in structure intervals, thus the formed liquid embryos incubate and grow in a spatially confined mode, which stores an excess surface energy and simultaneously provides a asymmetric Laplace pressure, stimulating the trapped droplets to undergo a dewetting transition or even a self-jumping, which can be facilitated by the tall and dense nanostructures. Subsequently, the adjacent droplets merge mutually and further trigger more multifarious self-propelled behaviors that are affected by underlying surface nanostructure, including dewetting transition, coalescence-induced jumping and jumping relay. Moreover, an improved energy-based model was developed by considering both the surface structure properties and the nano-physical effects, the theoretical prediction not only extends the coalescence-induced jumping to the nanometer-sized droplets but also correlates the surface nanostructure topology to the jumping velocity. Such a domino effect of nucleation-growth-coalescence on the ultimate morphology of droplet may offer a new strategy for designing functional nanostructured surfaces that serve to orientationally manipulate, transport and collect droplets, and motivate surface engineers to realize a stable cascade jumping-droplet condensation and achieve its performance ceiling.

跳跃液滴凝结，即凝结液滴在聚结时的平面外跳跃，在能量收集、液滴操纵、热管理等领域一直是一项很有前途的技术创新，但由于实现的挑战而受到限制。可持续和可编程的控制。在这里，我们表征了纳米级凝聚物在不同纳米柱上的形态演变和动力学行为表面，并发现在整个液滴生命周期中存在未揭示的多米诺骨牌效应，并且聚结并不是获得液滴跳跃的唯一机制。蒸汽成核优先发生在结构区间，因此形成的液体胚胎以空间受限的方式孵育和生长，储存多余的表面能，同时提供不对称的拉普拉斯压力，刺激捕获的液滴进行去湿转变甚至自-跳跃，高而致密的纳米结构. 随后，相邻的液滴相互合并，进一步触发更多受底层表面纳米结构影响的自驱动行为，包括去湿转变、聚结诱导跳跃和跳跃接力。此外，通过考虑表面结构特性和纳米物理效应开发了改进的基于能量的模型，理论预测不仅将聚结诱导的跳跃扩展到纳米尺寸的液滴，而且还将表面纳米结构拓扑与跳跃速度。这种成核-生长-聚结对液滴最终形态的多米诺骨牌效应可能为设计功能性纳米结构表面提供一种新策略，这些表面用于定向操纵、运输和收集液滴，