THE STRUCTURE OF SURFACES OF SURFACTANT SOLUTIONS ABOVE THE CRITICAL MICELLE CONCENTRATION

E. Lee , E. Simister , R. Thomas , J. Penfold

Specular reflection of neutrons from surfactant solutions above their critical micelle concentrations indicates that layer structures are formed in the vicinity of the surface. The mean spacing of the structures varies with chainlength in a way that suggests the presence of surfactant bilayers. The number of layers is estimated to be between about 5 and 15. Near the surface the structure seems to be similar to either a nematic phase or a lamellar phase. The presence of a layered structure would require there to be a large surface excess of surfactant.

Domaines: Articles anciens

E. Lee, E. Simister, R. Thomas, J. Penfold. THE STRUCTURE OF SURFACES OF SURFACTANT SOLUTIONS ABOVE THE CRITICAL MICELLE CONCENTRATION. Journal de Physique Colloques, 1989, 50 (C7), pp.C7-75-C7-81. ⟨10.1051/jphyscol:1989707⟩. ⟨jpa-00229680⟩