Abstract
The lifetime of antibubbles - droplets separated from a liquid bath by a thin layer of air - has typically been too short for further study or application. We experimentally demonstrate a mechanical method for extending the antibubble lifetime from minutes to hours. The recorded longest lifetime is up to 13 hours. In our method, vertical vibrations stabilize the air film as successive shocks on the antibubble top compensate the upward air drainage. To suppress Faraday waves, the liquid surface is covered with bubbles. A theoretical model is built to obtain the threshold for a long-lived antibubble. In the figure, the black scale bar is 20mm and the blue one 2mm.
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