Multiscale Roughness and Stability of Superhydrophobic Biomimetic Interfaces
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- 13 February 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 23 (6), 3157-3161
- https://doi.org/10.1021/la062301d
Abstract
The stability of a composite interface of roughness-induced superhydrophobic surfaces is studied. To have high contact angle and low contact angle hysteresis, superhydrophobic surfaces should be able to form a composite interface with air pockets in the valleys between asperities (pillars). However, the composite interface may be unstable and can be irreversibly transformed into a homogeneous interface. We formulate a stability criterion and analyze the stability of the composite interface for several typical roughness profiles. To resist destabilizing mechanisms, multiscale (hierarchical) roughness is required. Such multiscale roughness is found in natural and artificial superhydrophobic surfaces.Keywords
This publication has 21 references indexed in Scilit:
- Discontinuous Liquid Rise in Capillaries with Varying Cross-SectionsLangmuir, 2006
- Non-sticking dropsReports on Progress in Physics, 2005
- Water-repellent legs of water stridersNature, 2004
- Nonlinear Dependence of the Contact Angle of Nanodroplets on Contact Line CurvaturePhysical Review Letters, 2003
- Superhydrophobic statesNature Materials, 2003
- Transformation of a Simple Plastic into a Superhydrophobic SurfaceScience, 2003
- Super‐Hydrophobic Surfaces: From Natural to ArtificialAdvanced Materials, 2002
- Ultrahydrophobic Surfaces. Effects of Topography Length Scales on WettabilityLangmuir, 2000
- The relation between Young’s equilibrium contact angle and the hysteresis on rough paraffin wax surfacesColloids and Surfaces A: Physicochemical and Engineering Aspects, 1999
- Wettability of porous surfacesTransactions of the Faraday Society, 1944