Figure 2
From: Radial Wettable Gradient of Hot Surface to Control Droplets Movement in Directions
Movement behaviors of droplets on surface of Sample-A heated at different temperature.
a) The movement behaviors of droplet on the surface at ~140 oC. The droplet spreads along the wettable gradient direction at ~94 ms and exhibits directional evaporation in ~94−312 ms. b) The movement behaviors of droplet on the surface at ~145oC. Initially, the droplet moves along the wettable gradient direction at ~81 ms and then exhibits directional spreading in ~81−241 ms. Finally, it exhibits directional evaporation in ~241−463 ms. c) The sliding behavior of droplet at ~150 oC. The droplet keeps ball shape and slides off the horizontal surface fast along the wettable gradient direction at ~586 ms. The volume of droplet is 10 μL. The scale bar, 10 mm.
