Pan, S; Richardson, JJ; Christofferson, AJ; Besford, QA; Zheng, T; Wood, BJ; Duan, X; ... Caruso, F; + view all Pan, S; Richardson, JJ; Christofferson, AJ; Besford, QA; Zheng, T; Wood, BJ; Duan, X; Jara Fornerod, MJ; McConville, CF; Yarovsky, I; Guldin, S; Jiang, L; Caruso, F; - view fewer (2021) Fluorinated Metal–Organic Coatings with Selective Wettability. Journal of the American Chemical Society , 143 (26) pp. 9972-9981. 10.1021/jacs.1c04396.

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Abstract

Surface chemistry is a major factor that determines the wettability of materials, and devising broadly applicable coating strategies that afford tunable and selective surface properties required for next-generation materials remains a challenge. Herein, we report fluorinated metal-organic coatings that display water-wetting and oil-repelling characteristics, a wetting phenomenon different from responsive wetting induced by external stimuli. We demonstrate this selective wettability with a library of metal-organic coatings using catechol-based coordination and silanization (both fluorinated and fluorine-free), enabling sensing through interfacial reconfigurations in both gaseous and liquid environments, and establish a correlation between the coating wettability and polarity of the liquids. This selective wetting performance is substrate-independent, spontaneous, durable, and reversible and occurs over a range of polar and nonpolar liquids (60 studied). These results provide insight into advanced liquid-solid interactions and a pathway toward tuning interfacial affinities and realizing robust, selective superwettability according to the surrounding conditions.

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