Publications

Water Mobility in the Interfacial Liquid Layer of Ice/Clay Nanocomposites

Author(s)
Hailong Li, Julian Mars, Wiebke Lohstroh, Michael Marek Koza, Hans‐Jürgen Butt, Markus Mezger
Abstract

At solid/ice interfaces, a premelting layer is formed at temperatures below the melting point of bulk water. However, the structural and dynamic properties within the premelting layer have been a topic of intense debate. Herein, we determined the translational diffusion coefficient D-t of water in ice/clay nanocomposites serving as model systems for permafrost by quasi-elastic neutron scattering. Below the bulk melting point, a rapid decrease of D-t is found for charged hydrophilic vermiculite, uncharged hydrophilic kaolin, and more hydrophobic talc, reaching plateau values below -4 degrees C. At this temperature, D-t in the premelting layer is reduced up to a factor of two compared to supercooled bulk water. Adjacent to charged vermiculite the lowest water mobility was observed, followed by kaolin and the more hydrophobic talc. Results are explained by the intermolecular water interactions with different clay surfaces and interfacial segregation of the low-density liquid water (LDL) component.

Organisation(s)
Dynamics of Condensed Systems
External organisation(s)
Max Planck Institute for Polymer Research, Technische Universität München, Institut Laue-Langevin (ILL)
Journal
Angewandte Chemie International Edition
Volume
60
Pages
7697-7702
No. of pages
6
DOI
https://doi.org/10.1002/anie.202013125
Publication date
03-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 103006 Chemical physics
Keywords
ASJC Scopus subject areas
Chemistry(all), Catalysis
Portal url
https://ucris.univie.ac.at/portal/en/publications/water-mobility-in-the-interfacial-liquid-layer-of-iceclay-nanocomposites(396c0163-d392-4cb0-8fcb-522c7cd3b641).html