Abstract
Wetting of a solid surface by a liquid is dramatically impeded if either the solid orthe liquid is decorated by particles. Here it is shown that in the case of contactbetween two liquids the opposite effect may occur; mixtures of a hydrophobic liquidand suitable particles form wetting layers on a water surface though the liquidalone is non-wetting. In these wetting layers, the particles adsorb to, and partiallypenetrate through, the liquid/air and/or the liquid/water interface. This formation ofwetting layers can be explained by the reduction in total interfacial energy due tothe replacement of part of the fluid/fluid interfaces by the particles. It is mostprominent if the contact angles at the fluid/fluid/particle contact lines are close to90°.
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