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Water Adsorption on Mica Surfaces with Hydrophilicity Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination
[Image: see text] The stability of adsorbed water films on mineral surfaces has far-reaching implications in the Earth, environmental, and materials sciences. Here, we use the basal plane of phlogopite mica, an atomically smooth surface of a natural mineral, to investigate water film structure and s...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10597534/ https://www.ncbi.nlm.nih.gov/pubmed/37881644 http://dx.doi.org/10.1021/acs.jpcc.2c04751 |
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author | Koishi, Ayumi Lee, Sang Soo Fenter, Paul Fernandez-Martinez, Alejandro Bourg, Ian C. |
author_facet | Koishi, Ayumi Lee, Sang Soo Fenter, Paul Fernandez-Martinez, Alejandro Bourg, Ian C. |
author_sort | Koishi, Ayumi |
collection | PubMed |
description | [Image: see text] The stability of adsorbed water films on mineral surfaces has far-reaching implications in the Earth, environmental, and materials sciences. Here, we use the basal plane of phlogopite mica, an atomically smooth surface of a natural mineral, to investigate water film structure and stability as a function of two features that modulate surface hydrophilicity: the type of adsorbed counterions (Na, K, and Cs) and the substitution of structural OH groups by F atoms. We use molecular dynamics simulations combined with in situ high-resolution X-ray reflectivity to examine surface hydration over a range of water loadings, from the adsorption of isolated water molecules to the formation of clusters and films. We identify four regimes characterized by distinct adsorption energetics and different sensitivities to cation type and mineral fluorination: from 0 to 0.5 monolayer film thickness, the hydration of adsorbed ions; from 0.5 to 1 monolayer, the hydration of uncharged regions of the siloxane surface; from 1 to 1.5 monolayer, the attachment of isolated water molecules on the surface of the first monolayer; and for >1.5 monolayer, the formation of an incipient electrical double layer at the mineral–water interface. |
format | Online Article Text |
id | pubmed-10597534 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-105975342023-10-25 Water Adsorption on Mica Surfaces with Hydrophilicity Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination Koishi, Ayumi Lee, Sang Soo Fenter, Paul Fernandez-Martinez, Alejandro Bourg, Ian C. J Phys Chem C Nanomater Interfaces [Image: see text] The stability of adsorbed water films on mineral surfaces has far-reaching implications in the Earth, environmental, and materials sciences. Here, we use the basal plane of phlogopite mica, an atomically smooth surface of a natural mineral, to investigate water film structure and stability as a function of two features that modulate surface hydrophilicity: the type of adsorbed counterions (Na, K, and Cs) and the substitution of structural OH groups by F atoms. We use molecular dynamics simulations combined with in situ high-resolution X-ray reflectivity to examine surface hydration over a range of water loadings, from the adsorption of isolated water molecules to the formation of clusters and films. We identify four regimes characterized by distinct adsorption energetics and different sensitivities to cation type and mineral fluorination: from 0 to 0.5 monolayer film thickness, the hydration of adsorbed ions; from 0.5 to 1 monolayer, the hydration of uncharged regions of the siloxane surface; from 1 to 1.5 monolayer, the attachment of isolated water molecules on the surface of the first monolayer; and for >1.5 monolayer, the formation of an incipient electrical double layer at the mineral–water interface. American Chemical Society 2022-09-20 /pmc/articles/PMC10597534/ /pubmed/37881644 http://dx.doi.org/10.1021/acs.jpcc.2c04751 Text en © 2022 American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Koishi, Ayumi Lee, Sang Soo Fenter, Paul Fernandez-Martinez, Alejandro Bourg, Ian C. Water Adsorption on Mica Surfaces with Hydrophilicity Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination |
title | Water Adsorption
on Mica Surfaces with Hydrophilicity
Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination |
title_full | Water Adsorption
on Mica Surfaces with Hydrophilicity
Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination |
title_fullStr | Water Adsorption
on Mica Surfaces with Hydrophilicity
Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination |
title_full_unstemmed | Water Adsorption
on Mica Surfaces with Hydrophilicity
Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination |
title_short | Water Adsorption
on Mica Surfaces with Hydrophilicity
Tuned by Counterion Types (Na, K, and Cs) and Structural Fluorination |
title_sort | water adsorption
on mica surfaces with hydrophilicity
tuned by counterion types (na, k, and cs) and structural fluorination |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10597534/ https://www.ncbi.nlm.nih.gov/pubmed/37881644 http://dx.doi.org/10.1021/acs.jpcc.2c04751 |
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