drodynamic coupling between the vertical motion of the sur-The behavior of solubilized alkanes at the surface of DoTAB face and the surface area changes is preserved.
solutions for various surfactant bulk concentrations below and
In the case of alkanes, the preparation of thin oil phases above the cmc is described. Several techniques such as tensiometry, is difficult, because in general, alkanes do not wet the surfacellipsometry, and Brewster angle microscopy, as well as an excited tant solutions completely. Alkane drops are in equilibrium capillary wave device are used for the study. Alkanes do not wet with a mixed oil-surfactant monolayer. Nevertheless, these the surface completely and form a mixed monolayer with the surmixed monolayers constitute a good model for a monolayer factant. Rather unusual viscoelastic behavior is observed for the at the oil-water interface. In the case of AOT surfactant, mixed monolayers. This suggests a new type of relaxation phenomthe alkane mixed monolayer properties are connected with enon, but its origin remains to be elucidated. α§ 1997 Academic Press the surfactant film bending elasticity and the phase behavior of the mixed system. Furthermore, a direct link was observed between the solubilization of alkanes into the monolayer and