Effect of Hydrogen Bonds on the Dielectric Properties of Interfacial Water

Sleeba Varghese, Sridhar Kannam, Jesper Schmidt Hansen, Sarith Sathian

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

The dielectric constant for water is reduced
under confinement. Although this phenomenon is well known,
the underlying physical mechanism for the reduction is still in
debate. In this work, we investigate the effect of the
orientation of hydrogen bonds on the dielectric properties
of confined water using molecular dynamics simulations. We
find a reduced rotational diffusion coefficient for water
molecules close to the solid surface. The reduced rotational
diffusion arises due to the hindered rotation away from the
plane parallel to the channel walls. The suppressed rotation in
turn affects the orientational polarization of water, leading to a
low value for the dielectric constant at the interface. We
attribute the constrained out-of-plane rotation to originate
from a higher density of planar hydrogen bonds formed by the interfacial water molecules.
OriginalsprogEngelsk
TidsskriftLangmuir
Vol/bind2019
Udgave nummer35
Sider (fra-til)8159-8166
Antal sider8
ISSN0743-7463
DOI
StatusUdgivet - 23 maj 2019

Citer dette

Varghese, Sleeba ; Kannam, Sridhar ; Hansen, Jesper Schmidt ; Sathian, Sarith. / Effect of Hydrogen Bonds on the Dielectric Properties of Interfacial Water. I: Langmuir. 2019 ; Bind 2019, Nr. 35. s. 8159-8166.
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abstract = "The dielectric constant for water is reduced under confinement. Although this phenomenon is well known, the underlying physical mechanism for the reduction is still in debate. In this work, we investigate the effect of the orientation of hydrogen bonds on the dielectric properties of confined water using molecular dynamics simulations. We find a reduced rotational diffusion coefficient for water molecules close to the solid surface. The reduced rotational diffusion arises due to the hindered rotation away from the plane parallel to the channel walls. The suppressed rotation in turn affects the orientational polarization of water, leading to a low value for the dielectric constant at the interface. We attribute the constrained out-of-plane rotation to originate from a higher density of planar hydrogen bonds formed by the interfacial water molecules.",
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Effect of Hydrogen Bonds on the Dielectric Properties of Interfacial Water. / Varghese, Sleeba; Kannam, Sridhar; Hansen, Jesper Schmidt; Sathian, Sarith.

I: Langmuir, Bind 2019, Nr. 35, 23.05.2019, s. 8159-8166.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Effect of Hydrogen Bonds on the Dielectric Properties of Interfacial Water

AU - Varghese, Sleeba

AU - Kannam, Sridhar

AU - Hansen, Jesper Schmidt

AU - Sathian, Sarith

PY - 2019/5/23

Y1 - 2019/5/23

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