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An interface is a surface forming a common boundary among two different phases of matter, such as an insoluble solid and a liquid, two immiscible liquids, a liquid and an insoluble gas or a liquid and vacuum. The importance of the interface depends on the type of system: the bigger the quotient area/volume, the more effect the surface phenomena will have. Therefore interfaces are very important in systems with big area to volume ratios, such as colloids.
Surface tension is the function which rules interface processes involving liquids.
One important interface is the gas liquid interface between aerosols and other atmospheric molecules.
- Surface science
- Surface tension
- Membrane (disambiguation)
- Capillary surface, a surface that represents the boundary between two fluids
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