A fluidic device with polymeric textured ratchets

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Nanotextured surfaces are widely used throughout nature for adhesion, wetting, and transport. Chemistry, geometry, and morphology are important factors for creating tunable textured surfaces, in which directionality of droplets can be controlled. Here, we fabricated nanotextured polymeric surfaces, and studied the effect of tilting on the mobility of frequency modulated water droplet transported on asymmetric nano-PPX tracks. Plastically-deformed tracks guided water droplets for sorting, gating, and merging them as a function on their volume. Polymeric ratchets open up new avenues for the fields of digital fluidics and flexible device fabrication.

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Sekeroglu, K., & Demirel, M. C. (2015). A fluidic device with polymeric textured ratchets. Polymer, 58, 30–35. https://doi.org/10.1016/j.polymer.2014.12.031

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