Hydrophobic Surface Enhances Electrostatic Interaction in Water

Takato Sato, Tohru Sasaki, Jun Ohnuki, Koji Umezawa, Mitsunori Takano*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


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.

Original languageEnglish
Article number206002
JournalPhysical Review Letters
Issue number20
Publication statusPublished - 2018 Nov 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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