Structure of Hydrated Sodium Ions and Water Molecules Adsorbed on the Mica/Water Interface
Structure of Hydrated Sodium Ions and Water Molecules Adsorbed on the Mica/Water Interface
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DOI：
10.1021/jp111936s
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发表时间：
2011-07
影响因子：
3.7
通讯作者：
H. Sakuma;T. Kondo;H. Nakao;K. Shiraki;K. Kawamura
中科院分区：
文献类型：
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作者：
H. Sakuma;T. Kondo;H. Nakao;K. Shiraki;K. Kawamura
固/液界面控制许多物理和化学性质，如电泳，摩擦和胶体颗粒的分散。固/液界面的原子分布与这些性质有很强的相关性，理解这些结构对于建立固/液界面的基本物理和化学是必要的。在这项研究中，我们研究了云母/NaCl水溶液界面的结构，使用表面X射线散射测量和分子动力学模拟。云母/NaCl水溶液界面的亚A尺度原子分布被揭示为垂直于界面的距离的函数。通过表面X射线散射测量观察到的NaCl溶液的密度振荡到与表面相距12 A。分子动力学模拟表明，振荡对应于水合Na+离子，吸附的水分子，和水分子周围的水合离子。结构有助于理解…
Solid/liquid interfaces control many physical and chemical properties such as electrophoresis, friction, and dispersion of colloid particles. Atomic distribution at solid/liquid interfaces has a strong correlation with these properties, and understanding these structures is necessary to establish the fundamental physics and chemistry of the solid/liquid interfaces. In this study, we have investigated the structure of mica/aqueous NaCl solution interfaces using surface X-ray scattering measurements and molecular dynamics simulations. The sub-A-scale atomic distribution of the mica/aqueous NaCl solution interface is revealed as a function of the distance normal to the interface. The density of the NaCl solution oscillates to be 12 A apart from the surface observed by the surface X-ray scattering measurements. Molecular dynamics simulations indicate that the oscillation corresponds to hydrated Na+ ions, adsorbed water molecules, and water molecules surrounding the hydrated ions. The structure helps to unders...