Editing Surfactant (section)

===Characterization of interfaces and surfactant layers===
Interfacial and surface tension can be characterized by classical methods such as the
-pendant or [[spinning drop method]].
Dynamic surface tensions, i.e. surface tension as a function of time, can be obtained by the [[Maximum bubble pressure method|maximum bubble pressure apparatus]]

The structure of surfactant layers can be studied by [[ellipsometry]] or [[X-ray reflectivity]].

Surface rheology can be characterized by the oscillating drop method or shear surface rheometers such as double-cone, double-ring or magnetic rod shear surface rheometer.