Hydrophobic Surface Enhances Electrostatic Interaction in Water

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

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    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
    Volume121
    Issue number20
    DOIs
    Publication statusPublished - 2018 Nov 15

    Fingerprint

    electrostatics
    water
    interactions
    permittivity
    dipoles
    molecular dynamics
    liquids
    simulation

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Hydrophobic Surface Enhances Electrostatic Interaction in Water. / Sato, Takato; Sasaki, Tohru; Ohnuki, Jun; Umezawa, Koji; Takano, Mitsunori.

    In: Physical Review Letters, Vol. 121, No. 20, 206002, 15.11.2018.

    Research output: Contribution to journalArticle

    Sato, Takato ; Sasaki, Tohru ; Ohnuki, Jun ; Umezawa, Koji ; Takano, Mitsunori. / Hydrophobic Surface Enhances Electrostatic Interaction in Water. In: Physical Review Letters. 2018 ; Vol. 121, No. 20.
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