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Controlling droplet spreading with topography
Physical Review Fluids
We present a novel experimental system that can be used to study the dynamics of a picolitre droplet (in-flight radius of 12.2µm) as it spreads over substrates with topographic variations. We concentrate on the spreading of a droplet within a recessed stadium-shaped pixel, with applications to the manufacture of POLED displays, and find that the sloping side wall of the pixel can either locally enhance or hinder spreading depending on whether the topography gradient ahead of the contact line isdoi:10.1103/physrevfluids.2.094002 fatcat:ey2vat3r2vekle3gofcnklxg2q