Elastic instability and contact angles on hydrophobic surfaces with periodic textures

被引：27

作者：

Dubov, A. L. ^{[1
,2
]}

Teisseire, J. ^{[1
]}

Barthel, E. ^{[1
]}

机构：

[1] UMR 125 CNRS St Gobain, F-93303 Aubervilliers, France

[2] Russian Acad Sci, AN Frumkin Inst Phys Chem & Electrochem, Moscow 119991, Russia

来源：

EPL | 2012年 / 97卷 / 02期

关键词：

ULTRAHYDROPHOBIC POST SURFACES; SUPERHYDROPHOBIC SURFACES; HYSTERESIS; CASSIE; LINE; DYNAMICS; WENZEL; MODEL;

D O I：

10.1209/0295-5075/97/26003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Surface textures are used to impart advanced wetting properties to surfaces. However, understanding the surface response in relation to the nature of the texture is still a challenge. Here we have measured advancing and receding contact angles on model hydrophobic surfaces with cylindrical pillars as a function of the pillar spacing. We show that the dependences of both advancing and receding contact angles upon spacing are well accounted for by a simple model of the instability of the triple line, following the line elasticity theory by Joanny and de Gennes (J. Chem. Phys., 81 (1984) 552). This result demonstrates the prominent role of the triple-line elasticity in determining the wetting properties of textured surfaces. Copyright (C) EPLA, 2012

引用

页数：6

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