Slippery liquid-infused porous surfaces (SLIPS) are porous nanostructuresimpregnated with a low surface tension lubricant. They have recently showngreat promise in various applications that require non-wettablesuperhydrophobic surfaces. In this paper, we investigate experimentally theinfluence of the oil thickness on the wetting properties and drop impactdynamics of new SLIPS. By tuning the thickness of the oil layer depositedthrough spin-coating, we show that a sufficiently thick layer of oil isnecessary to avoid dewetting spots on the porous nanostructure and thusincreasing the homogeneity of the liquid distribution. Drop impact on thesesurfaces is investigated with a particular emphasis on the spreading andrebound dynamics when varying the oil thickness and the Weber number.
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