Wetting Behavior of Water Droplets on Hydrophobic Microtextures of Comparable Size
- 14 October 2004
- journal article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 20 (23), 10015-10019
- https://doi.org/10.1021/la0497651
Abstract
The wetting behavior of water droplets on periodically structured hydrophobic surfaces was investigated. The effect of structure geometry, roughness, and relative pore fraction on the contact angles was investigated experimentally for droplets of size comparable to the size of the structures. It was found that surface geometry may induce a transition from groove-filling and Wenzel-like behavior to nonfilling of surface grooves and consequential Cassie-Baxter behavior. Numerical calculations of the free energy of these systems suggest that the equilibrium behavior is in line with the experimental observations. The observations may serve as guidelines for the design of surfaces with the desired wetting behavior.Keywords
This publication has 17 references indexed in Scilit:
- Fabrication of Tunable Superhydrophobic Surfaces by Nanosphere LithographyChemistry of Materials, 2004
- Nonlinear Dependence of the Contact Angle of Nanodroplets on Contact Line CurvaturePhysical Review Letters, 2003
- Wetting on Hydrophobic Rough Surfaces: To Be Heterogeneous or Not To Be?Langmuir, 2003
- Superhydrophobic statesNature Materials, 2003
- Transformation of a Simple Plastic into a Superhydrophobic SurfaceScience, 2003
- Effects of Surface Structure on the Hydrophobicity and Sliding Behavior of Water DropletsLangmuir, 2002
- Ultrahydrophobic Surfaces. Effects of Topography Length Scales on WettabilityLangmuir, 2000
- Ultrahydrophobic and Ultralyophobic Surfaces: Some Comments and ExamplesLangmuir, 1999
- Effects of surface roughness on wettabilityActa Materialia, 1998
- Wettability of porous surfacesTransactions of the Faraday Society, 1944