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Abstract
The development of responsive slippery surfaces is important because of the high demand for such materials in the fields of liquid manipulation on biochips, microfluidics, microreactions, and liquid‐harvesting devices. Although great progress has been achieved, the effect of substrate wettability on slippery surfaces stability is overlooked by scientists. In addition, current responsive slippery surfaces generally function utilizing single external stimuli just for imprecisely controlling liquid motion, while advanced intelligences are always expected to be integrated into one smart interface material for widespread multifunctional applications. Therefore, designing slippery surfaces that collaboratively respond to complex external stimuli and possess sophisticated composite function for expanding applications from controlling droplets motion to patterned writing is urgently needed but remains a challenge. Here, a photoelectric cooperative‐responsive slippery surface based on ZnO nanoporous composites is demonstrated. First, the effect of composite surface wettability on slippery surface stability is systematically researched and the optimum wettability region for fabricating stable slippery surfaces is determined. Furthermore, controllable droplet motion and patterned writing are realized on the same slippery surfaces under photoelectric cooperative stimuli, and the related response mechanism is also deeply studied. This kind of material has potential applications in biochips, microfluidics, in situ patterning, and water‐harvesting systems.
Highlights
Slippery surfaces have recently been extensively studied[1,2,3,4] because of their excellent the high demand for such materials in the fields of liquid manipulation self-cleaning properties, self-healing properon biochips, microfluidics, microreactions, and liquid-harvesting devices
Great progress has been made in preparing slippery surfaces, the relationship between substrate surface energy, which can be indicated by substrate wettability, and slippery surface stability has not been clearly studied but is of vital importance for guiding the preparation of stable slippery surfaces
We presented photoelectric cooperative-respon- spectroscopy (EDS) element analysis (Figure S3, Supporting sive ZnO-cis-bis(4,4′-dicarboxy-2,2′-bipyridine) dithiocyanato Information) clearly indicate that the N3 and FAS have been ruthenium(II)-heptadecafluorodecyl-trimethoxysilane
Summary
We successfully obtained a cooperativemanipulation on the slippery surface by photoelectric coopera- responsive slippery surface based on nanoporous compostive stimuli, we developed a mechanism using the following ites. Www.advancedscience.com on the stability of slippery surfaces was systematically studied. Compared with the results of previously published work on slippery surfaces, we achieved appropriate substrate wetting conditions for preparing a stable slippery surface. Controllable droplet motion and patterned writing were realized by photoelectric cooperative stimuli on the slippery surfaces, and the related response mechanism was deeply studied. This work facilitates an in-depth understanding of substrate wettability influence on slippery surface stability and their underlying photoelectric cooperative response principles. The work will substantially advance the usage of slippery surfaces in fields such as conductive liquid collection and transfer, microfluidics, microchips, and patterned writing
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