A drop in a drop in a drop in the bucket

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Science  03 Oct 2014:
Vol. 346, Issue 6205, pp. 51
DOI: 10.1126/science.346.6205.51-e

Emulsions consist of droplets of one liquid that are held inside a second liquid, where the two liquids do not normally mix. Haase and Brujic show a simple method to make emulsions in which multiple layers of droplets can be trapped inside each other. By varying the concentrations of oil, a polar solvent, and water, they can get up to five layers of inner droplets as the ternary mixture is dripped into a water solution containing surfactant. It is also possible to fuse droplets to give larger, stabilized droplets with ordered internal structure.

Angew. Chemie. Int. Ed. 10.1002/anie.201406040 (2014).

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