Bat-El Pinchasik, Helmuth Möhwald and Andre G. Skirtach Mimicking Bubble Use in Nature: Propulsion of Janus Particles due to Hydrophobic-Hydrophilic Interactions Small 10
The ladybird beetle (Coccinellidae) can walk on solid substrates underwater due to bubbles entrapped under a hair-like structure in its legs. Other animals such as the purple snail (Janthina janthina) use stable bubbles in order to float at the air/water interface of the ocean. Both mechanisms are based on hydrophobic–hydrophilic interactions, minimization of surface tension, and buoyancy. Mimicry of these principles is used to propel and localize Janus particles in water.
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