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Download fileFluorinated Metal–Organic Coatings with Selective Wettability
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posted on 2021-06-25, 17:05 authored by Shuaijun Pan, Joseph J. Richardson, Andrew J. Christofferson, Quinn A. Besford, Tian Zheng, Barry J. Wood, Xiaofei Duan, Maximiliano Jesus Jara Fornerod, Christopher F. McConville, Irene Yarovsky, Stefan Guldin, Lei Jiang, Frank CarusoSurface 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.