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Chemical gardens in horizontal confined geometry: diffusion-controlled growth and osmotic lysis

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Chemical gardens are self-assembled semi-permeable precipitate structures. They are considered to be the laboratory analogue to hydrothermal vents—volcanic activities in the deep sea that have been hypothesised to be relevant to the origin of life. In this work, we grow chemical gardens in the confinement of a horizontal Hele-Shaw cell. It is found that the growth of the chemical gardens follows a diffusion-controlled dynamics. At a reproducible time after the start of an experiment, the chemical garden fractures and bursts. We consider this to be caused by a mechanism similar to osmotic lysis of biological cells.

This talk is part of the DAMTP BioLunch series.

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