Sliding behavior of water droplet on superhydrophobic surface

被引：64

作者：

Hao, Pengfei ^{[1
]}

Lv, Cunjing ^{[1
]}

Yao, Zhaohui ^{[1
]}

He, Feng ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China

来源：

EPL | 2010年 / 90卷 / 06期

基金：

美国国家科学基金会;

关键词：

INTERNAL FLUIDITY; CONTACT ANGLES; MOTION; WETTABILITY; FABRICATION; HYSTERESIS; ROUGHNESS;

D O I：

10.1209/0295-5075/90/66003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We found experimentally that the advancing contact angles on micropillar-like superhydrophobic surfaces are hardly affected by the fraction of the water-solid interface area, while the receding contact angles and the sliding angles are strongly influenced by this geometrical parameter. Different from previous works, using particle image velocimetry (PIV) and particle tracking velocimetry (PTV) techniques, both rolling and slipping motions were observed for 5 mu L water droplet during its sliding-down. We revealed that the rolling only occurs at the edge of the water droplet and the slip velocity is higher than the rolling velocity due to the low viscosity of water. Copyright (c) EPLA, 2010

引用

页数：6

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