Random Interface Model of Sponge Phases
Random Interface Model of Sponge Phases
复制标题
海绵相的随机界面模型
DOI：
10.1209/0295-5075/31/4/004
复制
发表时间：
1995
期刊：
影响因子：
1.8
通讯作者：
S. Safran
中科院分区：
文献类型：
--
作者：
P. Pieruschka;S. Safran
我们提出了一个连贯的结构和热力学方法的海绵相的表面活性剂溶液的表面活性剂膜的弯曲模量κ，表面活性剂的浓度s和内部/外部比的特征在于基于曲率能。我们发现，在熵驱动下，对称（S）和非对称（A）海绵相之间的相变是可能的，其临界值为s ~ κ-1/3。薄膜散射和体散射的相关长度和结构波矢量k 0（κ，，s）是一致的。薄膜散射在小波矢近似有一个反正切的形式，并取决于k 0的值，或多或少明显的不规则性在约2k 0。
We present a coherent structural and thermodynamic approach to sponge phases of surfactant solutions based on the curvature energy of the surfactant film characterized by the bending moduli κ, , the surfactant concentration s and the inside/outside ratio . We find that an entropy-driven transition between symmetric (S) and asymmetric (A) sponge phases with a critical s ~ κ-1/3 is possible. Film and bulk scattering are given consistently, in terms of the correlation length ξ(κ, , s) and the structural wave vector k0(κ, , s). The film scattering at small wave vectors has approximately an arctangent form and—depending on the value of k0 ξ—a more or less pronounced irregularity at about 2k0.