Three‐Level Biomimetic Rice‐Leaf Surfaces with Controllable Anisotropic Sliding

Rice leaves with anisotropic sliding properties have the ability to directionally control the movement of water microdroplets. However, the realization of artificial anisotropic sliding biosurfaces has remained challenging. It is found, by a systematic investigation, that the height of 200‐μm‐width groove arrays on rice leaves reaches up to 45 μm, far greater than the smaller microgrooves that are widely adopted for the study of anisotropic...