A high dielectric constant is one of the peculiar properties of liquid water, indicating that the electrostatic interaction between charged substances is largely reduced in water. We show by molecular dynamics simulation that the dielectric constant of water is decreased near the hydrophobic surface. We further show that the decrease in the dielectric constant is due to both the decreased water density and the reduced water dipole correlation in the direction perpendicular to the surface. We finally demonstrate that electrostatic interaction in water is actually strengthened near the hydrophobic surface.

中文翻译：

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疏水表面增强了水中的静电相互作用

高介电常数是液态水的特性之一，表明水中带电物质之间的静电相互作用大大降低。我们通过分子动力学模拟表明，水的介电常数在疏水表面附近降低。我们进一步表明，介电常数的降低是由于垂直于表面方向的水密度降低和水偶极子相关性降低。我们最终证明，在疏水表面附近，水中的静电相互作用实际上得到了增强。