 Pickering emulsion

An emulsion stabilized by particles adsorbed at the liquid–liquid interface. A partially wetting sphere has a detachment-energy scale $\pi r^2\gamma (1-|\cos \theta |{)}^2$, which can greatly exceed $k_{B}T$ for nanoparticles; complete wetting and insufficient coverage prevent a universal stability guarantee.

A Pickering emulsion is a type of emulsion that is stabilized by solid particles rather than traditional surfactants. In a typical emulsion, like oil and water, surfactants are used to reduce the surface tension between the two immiscible liquids, helping them to mix and stabilize the dispersion.