Electrochemical-etching and surface chemical modification technologies were first utilized to prepare superhydrophobic substrates. Then the electrochemical-etching technology was applied with a mask to directly fabricate superhydrophilic dimples on the prepared superhydrophobic surfaces (see Supplementary Information ...
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To design a suitable material, Dai and his collaborators had to meet some diverse criteria, including creating a surface that allowed the lubricant to be uniformly retained. Moreover, the surface chemistry had to be more favorable for the lubricant than for the water to wet solid textures, and...