Regulating
Underwater Oil Adhesion on Superoleophobic
Copper Films through Assembling <i>n</i>‑Alkanoic
Acids
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Abstract
Controlling
liquid adhesion on special wetting surface is significant
in many practical applications. In this paper, an easy self-assembled
monolayer technique was advanced to modify nanostructured copper substrates,
and tunable adhesive underwater superoleophobic surfaces were prepared.
The surface adhesion can be regulated by simply varying the chain
length of the <i>n</i>-alkanoic acids, and the tunable adhesive
properties can be ascribed to the combined action of surfaces nanostructures
and related variation in surface chemistry. Meanwhile, the tunable
ability is universal, and the oil-adhesion controllability is suitable
to various oils including silicon oil, <i>n</i>-hexane,
and chloroform. Finally, on the basis of the special tunable adhesive
properties, some applications of our surfaces including droplet storage,
transfer, mixing, and so on are also discussed. The paper offers a
novel and simple method to prepare underwater superoleophobic surfaces
with regulated adhesion, which can potentially be applied in numerous
fields, for instance, biodetection, microreactors, and microfluidic
devices