Kinetics of Lamellar to Gyroid Transition in a Nonionic Surfactant System has been investigated by means of a small angle x-ray scattering (SAXS) technique. For large ΔT (ΔT=T-TLG, T: temperature, TLG: lamellar to gyroid transition temperature) in the lamellar phase, the SAXS profiles can be described by a structure factor for undulation fluctuation lamellae. Approaching the temperature to the TLG, an excess diffuse scattering grows at lower Q (Q: magnitude of scattering vector) side of the first lamellar peak. This diffuse scattering arises from the modulation fluctuation of lamellar layer. At the TLG, the PFL transformed to the gyroid phase through a transient ordered structure having a rhombohedral symmetry.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry