Spontaneous Wenzel to Cassie dewetting transition on structured surfaces

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number073904
Journal / PublicationPhysical review fluids
Volume1
Issue number7
Online published29 Nov 2016
Publication statusPublished - Nov 2016

Abstract

Most superhydrophobic surfaces undergo a wetting transition from the Cassie to the Wenzel state, either spontaneously or under the action of external perturbations. The reverse dewetting transition is hampered by a large energy barrier and in order to achieve it, external fields are usually applied. Here we perform experiments, theoretical analysis, and lattice Boltzmann simulations of droplet condensation on a patterned superhydrophobic surface and demonstrate that the dewetting energy barrier can be reduced by manipulating the adhesion forces. Moreover, the kinetics of dewetting is a result of a subtle interplay of wetting and adhesion and in certain geometries, such as cone- shaped texture, the dewetting transition from Wenzel to Cassie state becomes spontaneous.

Research Area(s)

  • SUPERHYDROPHOBIC SURFACES, NANOSTRUCTURED SURFACES, DROPWISE CONDENSATION, WATER STRIDERS, MICRODROPLETS, STATES, DROPS, ROUGHNESS, EQUATION, DROPLETS

Citation Format(s)

Spontaneous Wenzel to Cassie dewetting transition on structured surfaces. / Zhang, Bo; Chen, Xuemei; Dobnikar, Jure; Wang, Zuankai; Zhang, Xianren.

In: Physical review fluids, Vol. 1, No. 7, 073904, 11.2016.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review