Unraveling wetting transition through surface textures with X-rays
Abstract
In this report we show that synchrotron X-ray radiography is a powerful method to study liquid-air interface penetration through opaque microtextured surface roughness, leading to wetting transition. We investigate this wetting phenomenon in the context of sessile drop evaporation, and establish that liquid interface sinking into the surface texture is indeed dictated by the balance of capillary and Laplace pressures, where the intrinsically three-dimensional nature of the meniscus must be accounted for. Air bubble entrapment in the texture underneath impacting water drops is also visualized and the mechanisms of post-impact drop evaporation are discussed. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000081133Publication status
publishedExternal links
Journal / series
Scientific ReportsVolume
Pages / Article No.
Publisher
Nature Publishing GroupSubject
Superhydrophobic surface; Impalement transitions; Droplet evaporation; Mechanism; Dynamics; ImpactOrganisational unit
03806 - Carmeliet, Jan / Carmeliet, Jan
03462 - Poulikakos, Dimos / Poulikakos, Dimos
03817 - Stampanoni, Marco F.M. / Stampanoni, Marco F.M.
Funding
135479 - Towards Supericephobic Surfaces - A Fundamental Study into the Effects of Morphology and Surface Functionality on Ice Formation and Adhesion (SNF)
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