Static and dynamic structures of spherical nonionic surfactant micelles during the disorder-order transition
Static and dynamic structures of spherical nonionic surfactant micelles during the disorder-order transition
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DOI：
10.1063/1.1839559
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发表时间：
2005-01-22
影响因子：
4.4
通讯作者：
Nakaya, K
中科院分区：
文献类型：
--
作者：
Imai, M;Yoshida, I;Nakaya, K
我们已经研究了静态和动态结构的非离子表面活性剂胶束，C12 E8/水的二元体系，在无序-有序过渡期间，使用小角X射线散射，静态光散射和动态光散射技术。在无序相中，胶束呈球形，胶束间相互作用受硬核和弱长程吸引势控制。随着胶束浓度的增加，无序胶束转变为三个特征有序胶束相，六方密排晶格，体心立方晶格，和A15晶格具有面积最小化结构。这些相的稳定性通过紧密堆积规则和由Ziherl和Kamien提出的最小面积规则的平衡很好地解释[Phys. Rev. Lett. 85，3528（2000）]。比较了流体动力学相互作用在表面活性剂胶束溶液和硬球胶体颗粒悬浮液中的作用。(C)2005年美国物理学会。
We have investigated the static and dynamic structures of nonionic surfactant micelles, a C12E8/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. (C) 2005 American Institute of Physics.