Hybrid Topography of Lotus Leaf under Hydrostatic/Hydrodynamic Pressure

Abstract

AbstractThe superhydrophobic characteristics and functional durability of the lotus leaf are determined by its surface flexible multistage topography. In this study, it is found that the hybrid arrangement of sub‐millimeter (sub‐mm) and micron papillae arrays on the edge of lotus leaves is more conducive to its resistance to hydrostatic and hydrodynamic water pressure, which provides a guarantee for the survival of lotus leaves. Inspired by this special design, a flexible hybrid structure is prepared by the template method, whose surface contains sub‐mm pillars, micropillars, and nanostructures. It has obvious advantages in resisting the continuous impact of water droplets. This systematic study reveals why the surface of the lotus leaf can withstand the fluid impact, and it provides a theoretical and experimental basis for improving the durability of artificial superhydrophobic function.