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Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules

[Image: see text] Despite its unrivaled hardness, diamond can be severely worn during the interaction with others, even softer materials. In this work, we calculate from first-principles the energy and forces necessary to induce the atomistic wear of diamond and compare them for different surface or...

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Autores principales: Ta, Huong T. T., Tran, Nam V., Righi, M. C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569040/
https://www.ncbi.nlm.nih.gov/pubmed/37755138
http://dx.doi.org/10.1021/acs.langmuir.3c01800
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author Ta, Huong T. T.
Tran, Nam V.
Righi, M. C.
author_facet Ta, Huong T. T.
Tran, Nam V.
Righi, M. C.
author_sort Ta, Huong T. T.
collection PubMed
description [Image: see text] Despite its unrivaled hardness, diamond can be severely worn during the interaction with others, even softer materials. In this work, we calculate from first-principles the energy and forces necessary to induce the atomistic wear of diamond and compare them for different surface orientations and passivation by oxygen, hydrogen, and water fragments. The primary mechanism of wear is identified as the detachment of the carbon chains. This is particularly true for oxidized diamond and diamonds interacting with silica. A very interesting result concerns the role of stress, which reveals that compressive stresses can highly favor wear, making it even energetically favorable.
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spelling pubmed-105690402023-10-13 Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules Ta, Huong T. T. Tran, Nam V. Righi, M. C. Langmuir [Image: see text] Despite its unrivaled hardness, diamond can be severely worn during the interaction with others, even softer materials. In this work, we calculate from first-principles the energy and forces necessary to induce the atomistic wear of diamond and compare them for different surface orientations and passivation by oxygen, hydrogen, and water fragments. The primary mechanism of wear is identified as the detachment of the carbon chains. This is particularly true for oxidized diamond and diamonds interacting with silica. A very interesting result concerns the role of stress, which reveals that compressive stresses can highly favor wear, making it even energetically favorable. American Chemical Society 2023-09-27 /pmc/articles/PMC10569040/ /pubmed/37755138 http://dx.doi.org/10.1021/acs.langmuir.3c01800 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Ta, Huong T. T.
Tran, Nam V.
Righi, M. C.
Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules
title Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules
title_full Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules
title_fullStr Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules
title_full_unstemmed Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules
title_short Atomistic Wear Mechanisms in Diamond: Effects of Surface Orientation, Stress, and Interaction with Adsorbed Molecules
title_sort atomistic wear mechanisms in diamond: effects of surface orientation, stress, and interaction with adsorbed molecules
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569040/
https://www.ncbi.nlm.nih.gov/pubmed/37755138
http://dx.doi.org/10.1021/acs.langmuir.3c01800
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