Inorganic Surface Coating with Fast Wetting-Dewetting Transitions for Liquid Manipulations

ACS Applied Materials & Interfaces
Yajie YangJianlin Zhao

Abstract

Liquid manipulation is a fundamental issue for microfluidics and miniaturized sensors. Fast wetting-state transitions by optical methods have proven being efficient for liquid manipulations by organic surface coatings, however rarely been achieved by using inorganic coatings. Here, we report a fast optical-induced wetting-state transition surface achieved by inorganic coating, enabling tens of second transitions for a wetting-dewetting cycle, shortened from an hour, as typically reported. Here, we demonstrate a gravity-driven microfluidic reactor and switch it to a mixer after a second-step exposure in a minimum of within 80 s of UV exposure. The fast wetting-dewetting transition surfaces enable the fast switchable or erasable smart surfaces for water collection, miniature chemical reaction, or sensing systems by using inorganic surface coatings.

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Citations

Aug 17, 2018·ACS Applied Materials & Interfaces·Eric S MuckleyIlia N Ivanov
Oct 3, 2018·ACS Central Science·Yifan SiLei Jiang

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