Creation of smart materials and surfaces with control of wetting behavior is an important problem that has occupied scientists for decades. Surface wetting behavior controls numerous phenomena that we experience on a daily basis such as the application of creams and cosmetics, rain hitting buildings or car windshields, the staining of textiles and fabrics, or condensation on heating or cooling equipment. Ideally one would like to be able to apply coatings that can resist water or other liquids, or a “slippery” coating, to any arbitrary substrate be it metal, polymer, ceramic, or fabric. This coating should also have mechanical robustness and be able to perform over a large temperature range, to be washed or folded, depending on the substrate, or to withstand mechanical stress and strain. Lastly, such a coating should be made without materials of questionable safety, such as long-chain perfluorinated acids that are environmentally persistent and some of which are bioaccumulative as well.¹