ELECTRIC COMPONENT OF THE INTERFACIAL BENDING MOMENT AND THE CURVATURE ELASTIC-MODULI

The interfacial bending moment and curvature elastic moduli are relate d theoretically to the surface potential, Delta V, which is liable to direct measurement, The dependence of the interfacial bending properti es on the position of the Gibbs dividing surface is investigated, As a n application, experimental data for the surface potential of micellar surfactant solutions containing Al3+ ions are analyzed, The changes i n the bending moment, as determined from Delta V potential, correlate with the transition from spherical to cylindrical micelles induced by the Al3+ ions, The results can be important for interpretation of data for formation of microemulsions, flocculation in emulsions, fluctuati on capillary waves at interfaces and biomembranes, interactions betwee n inclusions in lipid bilayers, etc. (C) 1996 Academic Press, Inc.