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arXiv 0709.1133cond-mat.stat-mech
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溶剂涨落在疏水组装中的作用

The Role of Solvent Fluctuations in Hydrophobic Assembly

A. P. Willard, D. Chandler

摘要:

我们采用粗粒溶剂模型研究了两种纳米疏水粒子在水中的自组装行为。我们展示了溶剂的自由度是如何参与这个过程的。利用过渡路径采样的方法,我们阐明了描述组装的反应坐标。与先前的预期一致,我们发现溶质周围的液体-蒸气状界面的波动是显著的,在这种情况下,导致两个溶质颗粒之间形成蒸气隧道。这条隧道加速了组装。在考虑这个特定的模型系统时,我们使用的方法说明了一种广泛适用的方法。

英文摘要:

We use a coarse grained solvent model to study the self assembly of two nano-scale hydrophobic particles in water. We show how solvent degrees of freedom are involved in the process. By using tools of transition path sampling, we elucidate the reaction coordinates describing the assembly. In accord with earlier expectations, we find that fluctuations of the liquid-vapor-like interface surrounding the solutes are significant, in this case leading to the formation of a vapor tunnel between the two solute particles. This tunnel accelerates assembly. While considering this specific model system, the approach we use illustrates a methodology that is broadly applicable.

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