How does the leaf margin make the lotus surface dry as the lotus leaf floats on water?

Soft Matter

Volumn 4, Issue 11, 2008, Pages 2232-2237

  Zhang, Jihua ^c   Wang, Jinming ^a   Zhao, Yong ^a   Xu, Liang ^a   Gao, Xuefeng ^a   Zheng, Yongmei ^b   Jiang, Lei ^a  

^a INSTITUTE OF CHEMISTRY   (China)

^b BEIHANG UNIVERSITY   (China)

^c Aerospace Research Institute of Materials and Processing Technology   (China)

Author keywords

[No Author keywords available]

Indexed keywords

ANISOTROPIC TOPOGRAPHY; LOTUS LEAF; MICRO DEVICES; NON-WETTING; STRUCTURE EFFECT; UPPER SURFACE;

BIOLOGY; ENERGY BARRIERS;

SURFACE TOPOGRAPHY;

EID: 67849106662     PISSN: 1744683X     EISSN: 17446848     Source Type: Journal    
DOI: 10.1039/b807857b     Document Type: Article

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53. The meniscus depth (h) under water is related to the buoyancy of the leaves as the result of the pressure difference between the top and the bottom of the surface, and also relative to the wettability of the margins, which can be approximately estimated by:citref idrefs="cit48 cit49" 48,49h & 2asin(/2), where a is the capillary constant, a ≈ 2.7 mm for water, and is the advancing angle on the solid surface. Therefore, the restriction force of margins against overflowing should indeed include the buoyancy caused by the meniscus depth.