An interface is a surface forming a common boundary between two different phases.
Interface measurement applications include:
Spectroscopic Ellipsometers are capable of measuring interface thickness and determining the percentage of mixed materials forming at the interface.
Measurements are performed in a liquid environment. The sample is placed in a liquid cell filled with a liquid. Any interaction or adsorption of molecules in the liquid with the sample surface will generate thin film deposition, or molecular binding.
Spectroscopic ellipsometers provide very accurate film thickness measurement at solid/liquid interface.
Liquid/liquid and liquid/air interface
Measurements are performed in a liquid environment using a liquid cell. Aggregation of molecules at the liquid/air interface causes a more dense interface. The thickness of this interface can be measured very accurately by spectroscopic ellipsometry.