Abstract

Amplifying the intrinsic wettability of substrate material by changing the solid/liquid contact area is considered to be the main mechanism for controlling the wettability of rough or structured surfaces. Through theoretical analysis and experimental exploration, we have found that in addition to this wettability structure amplification effect, the surface structure also simultaneously controls surface wettability by regulating the wetting state via changing the threshold Young angles of the Cassie–Baxter and Wenzel wetting regions. This wetting state regulation effect provides us with an alternative strategy to overcome the inherent limitation in surface chemistry by tailoring surface structure. The wetting state regulation effect created by multi-scale hierarchical structures is quite significant and plays is a crucial role in promoting the superhydrophobicity, superhydrophilicity and the transition between these two extreme wetting properties, as well as stabilizing the Cassie–Baxter superhydrophobic state on the fabricated lotus-like hierarchically structured Cu surface and the natural lotus leaf.

中文翻译：

---

多尺度层次结构在调节结构化表面润湿状态和润湿性能中的作用

摘要

通过改变固/液接触面积来增强基材材料的固有润湿性被认为是控制粗糙或结构化表面润湿性的主要机制。通过理论分析和实验探索，我们发现除了这种润湿性结构放大效应外，表面结构还通过改变Cassie-Baxter和Wenzel润湿区域的阈值杨氏角来调节润湿状态，同时控制表面润湿性。这种润湿状态调节效应为我们提供了一种替代策略，通过定制表面结构来克服表面化学的固有限制。多尺度分级结构产生的润湿状态调节效应非常显着，对于促进超疏水性、超亲水性以及这两种极端润湿性能之间的过渡以及稳定制备的Cassie-Baxter超疏水状态起着至关重要的作用。莲花状分层结构的铜表面和天然荷叶。