...
首页> 外文期刊>The Journal of Chemical Physics >Twist grain boundaries in cubic surfactant phases
【24h】

Twist grain boundaries in cubic surfactant phases

机译:立方表面活性剂相中的扭曲晶界

获取原文
获取原文并翻译 | 示例
           

摘要

Twist grain boundaries in bicontinuous cubic surfactant phases are studied by employing aGinzburg-Landau model of ternary amphiphilic systems. Calculations are performed on a discretereal-space lattice with periodic boundary conditions for the lamellar La, gyroid G, diamond D, andthe Schwarz P phases for various twist angles. An isosurface analysis of the scalar order parameterreveals the structure of the surfactant monolayer at the interfaces between the oil-rich and water-richregions. The curvature distributions show that the grain boundaries are minimal surfaces. Theinterfacial free energy per unit area is determined as a function of the twist angle for the G, D, P,and lamellar phases using two complementary approaches: the Ginzburg-Landau free-energyfunctional and a geometrical approach based on the curvature energy of a monolayer. For the La, G,and D phases the interfacial free energy per unit area is very small, has the same order of magnitude,and exhibits a nonmonotonic dependence on the twist angle. The P phase is found to be unstablewith respect to the nucleation of grain boundaries.
机译:通过使用三元两亲体系的Ginzburg-Landau模型研究双连续立方表面活性剂相中的扭曲晶界。计算是在具有周期性边界条件的离散实空间晶格上进行的,其中层状La,回旋G,菱形D和Schwarz P相具有各种扭曲角。标量阶数参数的等值面分析揭示了富油区和富水区之间界面处表面活性剂单层的结构。曲率分布表明晶界是最小的表面。使用两种互补的方法,确定G,D,P和层状相的单位面积界面自由能与扭转角的关系:Ginzburg-Landau自由能泛函和基于单层曲率能的几何方法。对于La,G和D相,单位面积的界面自由能非常小,具有相同的数量级,并且对扭曲角表现出非单调依赖性。发现P相相对于晶界的成核是不稳定的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号