Superaerophobicity: Repellence of Air Bubbles from Submerged, Surface-Engineered Silicon Substrates

被引：38

作者：

Dorrer, Christian ^{[1
]}

Ruehe, Juergen ^{[1
]}

机构：

[1] Univ Freiburg, Dept Microsyst Engn IMTEK, D-79110 Freiburg, Germany

来源：

LANGMUIR | 2012年 / 28卷 / 42期

关键词：

SUPERHYDROPHOBIC SURFACES; CONTACT ANGLES; ROUGH SURFACES; SOLID-SURFACES; ATTACHMENT; BEHAVIOR; LOTUS; SIZE; TRANSITIONS; HYSTERESIS;

D O I：

10.1021/la303231z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Captive bubble experiments on surface-engineered silicon substrates with precisely tuned roughness and surface chemistry are reported. In these experiments, the substrates were submerged into water, and air bubbles were dispensed from below. Our measurements revealed a bubble-repellent behavior, with bubbles freely moving around on the submerged surfaces. Drawing an analogy to drops on superhydrophobic surfaces, this behavior is termed "superaerophobic", and the observed effects are explained with the formation of a composite wetting contact between bubble and substrate. The thermodynamics of the "superaerophobic" wetting state are analyzed, and an equation for the equilibrium contact angle is given.

引用

页码：14968 / 14973

页数：6

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