Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session F04: Water Dynamics in Different Environments: Experiment and Theory III. Nanoconfined Water
8:00 AM–10:48 AM,
Tuesday, March 3, 2020
Sponsoring Units: DCP DCOMP DBIO DSOFT
Chair: Angelos Michaelides, Univ Coll London
Abstract: F04.00006 : One atom thick angstrom-scale capillaries: Water flow*
(Univ of Manchester)
(Univ of Manchester)
Water transport through the channels, ranging in height from one to several dozen atomic planes, is characterized by unexpectedly fast flow (up to 1 metre per second) that we attribute to high capillary pressures of about 1000 bar and large slip lengths . For channels that accommodate only a few layers of water, the flow exhibits a marked enhancement that we associate with an increased structural order. In this talk, I will also discuss about how ions reconfigure their hydration shell, becoming essentially “squashed” while flowing through these capillaries. Water and ionic flows are coupled in such confinement, and the transport, driven by pressure and applied electric field, reveals a transistor-like electrohydrodynamic effect . I will conclude the talk by showing our recent results where only one layer of water is confined in these channels, essentially leading to two-dimensional water . Our results lay the basis for exploration of such Å-size channels in nanofluidics, molecular separation and other nanotechnologies.
 B. Radha et al., Nature 538, 222 (2016).
 A. Esfandiar et al., Science 358, 511 (2017).
 T. Mouterde et al., Nature 567, 87 (2019).
 K. Gopinadhan et al., Science 363, 145 (2019).
*EPSRC UK, Royal Society Fellowship, ERC
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