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Static and dynamic structures of spherical nonionic surfactant micelles during the disorder-order transition.
Imai, M; Yoshida, I; Iwaki, T; Nakaya, K.
Afiliação
  • Imai M; Department of Physics, Faculty of Science, Ochanomizu University, Otsuka, Bunkyo, Tokyo 112-8610, Japan.
J Chem Phys ; 122(4): 44906, 2005 Jan 22.
Article em En | MEDLINE | ID: mdl-15740297
ABSTRACT
We have investigated the static and dynamic structures of nonionic surfactant micelles, a C(12)E(8)/water binary system, during the disorder-order transition using small angle x-ray scattering, static light scattering, and dynamic light scattering techniques. In the disordered phase, the micelles have spherical shape and intermicellar interactions are governed by the hard core and weak long ranged attractive potentials. With increase of the micellar concentration, the disordered micelles transform to the three characteristic ordered micellar phases, a hexagonally close packed lattice, a body centered cubic lattice, and an A15 lattice having area-minimizing structure. The stability of these phases is well explained by balance of a close packing rule and a minimal-area rule proposed by Ziherl and Kamien [Phys. Rev. Lett. 85, 3528 (2000)]. The role of hydrodynamic interactions in surfactant micellar solutions was compared with that in hard sphere colloidal particle suspensions.
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2005 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Idioma: En Ano de publicação: 2005 Tipo de documento: Article