Experimental Soft Condensed Matter Group Harvard University, Prof. D. A. Weitz Cool Picture of the Moment

A beautiful oil-water interface was made by emulsification of water and a mixture of small and large colloidal particles in decalin. The particle-stabilized interface was left after complete evaporation, as shown in figure, and clearly identified by fluorescently labeled particles using confocal microscopy. Small particles are preferably adsorbed on the interface and large particles are trapped at some points. This interface system is a good model system to show interface stability like foams and emulsion gels.

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