Figure 5 | Scientific Reports

Figure 5

From: Self-propelled droplet transport on shaped-liquid surfaces

Figure 5

Impact, capture and transport of droplets. (a) \({5}\, \upmu {\hbox {L}}\) water droplet impacting on a tilted (\(\beta = 2.33^{\circ }\)) super-hydrophobic textured surface. Circles are the successive measured positions of the droplet. Due to the low normal adhesion, the droplet bounces and is transported downhill by the effect of gravity. (b) Same as (a) but for a liquid surface. The higher energy dissipation during impact and the strong wettability gradient allow the droplet to be captured rapidly and transported uphill. (c) Number of bounce B as a function of droplet volume and release height on a super-hydrophobic tilted surface. The black arrow highlights the configuration depicted in (a). (d) Similar as (c) but for a liquid surface. For all points on this plot, the droplets are successfully captured and moved uphill. The black arrow highlights the configuration depicted in (d). (e) Hanging droplet, captured and transported on an inverted shaped liquid surface.

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