Evidence for enhanced electrostatic interactions in lamellar monolayer systems

Abstract

The interlamellar spacing as a function of the surfactant concentration in a lamellar monolayer system containing a ionic surfactant was studied. It is demonstrated that even at large interlamellar spacings (6-14 nm) relative to the Debye lengths (order 0.7 nm), electrostatic repulsion still plays a significant role which is attributed to a coupling with monolayer undulations