Figure 1
From: Controlled droplet transport to target on a high adhesion surface with multi-gradients
(a) Schematic illustration of the formation of wettable gradient and Laplace pressure on a high adhesion surface. Treating graphite plate via gradient anodic oxidation to form wettable gradient; coating the prepared graphite plate with hydrophobic material to ensure a hydrophobic surrounding; peeling off a wedge-pattern to induce Laplace pressure gradient on the wettable gradient surface. (b) Droplet movement behaviour on surface with wettable gradient. (c) Droplet movement behaviour on surface with wedge-pattern. (d) Droplet movement behaviour on surface with wettable gradient and wedge-pattern. The droplets can be driven only on the surface combining wettable gradient and Laplace pressure. The scale bar is 2 mm.
