Repellency of the Lotus Leaf: Contact Angles, Drop Retention, and Sliding Angles

Much of the modeling done on repellency and super hydrophobicity has focused on surfaces with rectilinear geometries, but their wetting behavior is simpler and can be quite different from that of repellent surfaces with curved features. In this study, we model the contact angles and sliding angles e...

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Bibliographic Details
Published in:Langmuir 2014-07, Vol.30 (29), p.8791-8797
Main Authors: Extrand, C. W, Moon, Sung In
Format: Article
Language:English
Subjects:
Hydrophobic and Hydrophilic Interactions
Loteae - chemistry
Loteae - ultrastructure
Microscopy, Electron, Scanning
Plant Leaves - chemistry
Plant Leaves - ultrastructure
Surface Tension
Water - chemistry
Wettability
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Summary:Much of the modeling done on repellency and super hydrophobicity has focused on surfaces with rectilinear geometries, but their wetting behavior is simpler and can be quite different from that of repellent surfaces with curved features. In this study, we model the contact angles and sliding angles exhibited by the lotus leaf, accounting for the influence of curvature and pinning. Our estimates agree reasonably well with experimental observations.
ISSN:0743-7463
1520-5827
DOI:10.1021/la5019482