Roles of entropic excluded-volume effects in colloidal and biological systems: Analyses using the three-dimensional integral equation theory
Roles of entropic excluded-volume effects in colloidal and biological systems: Analyses using the three-dimensional integral equation theory
复制标题
DOI：
10.1016/j.ces.2004.02.023
复制
发表时间：
2006-04-01
影响因子：
4.7
通讯作者：
Kinoshita, M
中科院分区：
文献类型：
--
作者：
Kinoshita, M
在本文提出的理论中，在三维立方网格上求解超网链积分方程，以计算任意几何形状的超大物体与小球体中的大球体之间的熵诱导势的空间分布。由于非常大的物体的几何特征（例如，台阶边缘，沟槽，角和变化的曲率）的影响，然后可以通过分析沿大球体的特定轨迹的势来研究。执行了几个模型计算，并根据胶体和生物系统中发生的高度有序过程（例如，大分子之间的锁和键空间相互作用）中的熵排除体积效应的作用来解释所获得的结果。本文还讨论了蛋白质分子在水溶液中二级结构的形成、受控粒子阵列的构建以及利用环状分子和线性聚合物形成的复合物来合成分子管等相关问题。(c) 2005 Elsevier Ltd版权所有。
In the theory proposed here, the hypernetted-chain integral equations are solved on a three-dimensional cubic grid to calculate the spatial distribution of the potential entropically induced between a very big body of arbitrary geometry and a big sphere immersed in small spheres. Effects due to the geometric feature of the very big body (e.g., step edges, trenches, comers, and changing curvature) can then be investigated by analyzing the potential along a specific trajectory of the big sphere. Several model calculations are performed, and the results obtained are interpreted in terms of the roles of the entropic excluded-volume effects in highly ordered processes occurring within colloidal and biological systems (e.g., the lock and key steric interaction between macromolecules). Discussion is also given to related subjects such as the formation of secondary structures of a protein molecule in aqueous solution, the construction of controlled particle arrays, and the synthesis of a molecular tube using the complex formation by cyclic molecules and linear polymers. (c) 2005 Elsevier Ltd. All rights reserved.