Memory effects across surfactant mesophases.
We report a detailed analysis of deuteron NMR spectra of micellar, lamellar, cubic, and hexagonal mesophases in the aqueous non-ionic surfactant system C(12)E(6)/water. Samples are prepared with and without shear. Particular attention is paid to an interesting temperature-driven phase sequence that includes all of the above phases that are studied before and after shear parallel or perpendicular to the magnetic field direction. Surprising memory effects are found across mesophase transitions. These memory effects provide clues to the structure of the various phases.
Capitani
Donatella
D
Institute of Chemical Methodologies, CNR, Research Area of Rome, Via Salaria Km 29-300, Monterotondo Staz, Rome, Italy.
Yethiraj
Anand
A
Burnell
E Elliott
EE