Antibubbles: evidences of a critical pressure

Details Antibubbles: evidences of a critical pressure Antibubbles: evidences of a critical pressure

2003-05-07

arxiv.org/abs/cond-mat/0305126v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 8 figures

Scientific paper

We present experimental investigations of antibubbles. Such an unusual fluid object is a thin spherical air shell surrounding a liquid globule. We explain how to produce them and we study their stability. By overweighting antibubbles with a small amount of salt, they sink and pop at a definite depth. A critical depth related to a critical pressure has been found. A modified Laplace law describes the air shell thickness evolution with respect to pressure. This law combined with surfactant layers interaction allows to explain the critical depth for antibubble stability.

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