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Step-bunching instability of growing interfaces between ice and supercooled water

Ice-crystal growth in supercooled water is one of the most familiar examples of phase-transition dynamics, playing essential roles in various natural phenomena on Earth. Despite its fundamental importance, the microscopic view at the elementary step level remains elusive. Here, using an advanced opt...

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Autores principales: Murata, Ken-ichiro, Sato, Masahide, Uwaha, Makio, Saito, Fumiaki, Nagashima, Ken, Sazaki, Gen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8915970/
https://www.ncbi.nlm.nih.gov/pubmed/35238661
http://dx.doi.org/10.1073/pnas.2115955119
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author Murata, Ken-ichiro
Sato, Masahide
Uwaha, Makio
Saito, Fumiaki
Nagashima, Ken
Sazaki, Gen
author_facet Murata, Ken-ichiro
Sato, Masahide
Uwaha, Makio
Saito, Fumiaki
Nagashima, Ken
Sazaki, Gen
author_sort Murata, Ken-ichiro
collection PubMed
description Ice-crystal growth in supercooled water is one of the most familiar examples of phase-transition dynamics, playing essential roles in various natural phenomena on Earth. Despite its fundamental importance, the microscopic view at the elementary step level remains elusive. Here, using an advanced optical microscope, we find self-organization of elementary steps during ice-crystal growth, called step-bunching instability (SBI), driven by the competition between step dynamics, interfacial stiffness, and latent heat diffusions. We also find that the SBI transiently induces screw dislocations and resulting spiral growth in the late stage of the growth process. Furthermore, quantitative observations with a two-beam interferometer allow us to obtain insights into the relative importance of the various mechanisms of the step–step interactions. Our finding offers a significant clue to understanding the general mechanism of melt growth beyond ice-crystal growth, inseparably involving several broad research fields, including cryobiological, geophysical, and material branches.
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spelling pubmed-89159702022-09-01 Step-bunching instability of growing interfaces between ice and supercooled water Murata, Ken-ichiro Sato, Masahide Uwaha, Makio Saito, Fumiaki Nagashima, Ken Sazaki, Gen Proc Natl Acad Sci U S A Physical Sciences Ice-crystal growth in supercooled water is one of the most familiar examples of phase-transition dynamics, playing essential roles in various natural phenomena on Earth. Despite its fundamental importance, the microscopic view at the elementary step level remains elusive. Here, using an advanced optical microscope, we find self-organization of elementary steps during ice-crystal growth, called step-bunching instability (SBI), driven by the competition between step dynamics, interfacial stiffness, and latent heat diffusions. We also find that the SBI transiently induces screw dislocations and resulting spiral growth in the late stage of the growth process. Furthermore, quantitative observations with a two-beam interferometer allow us to obtain insights into the relative importance of the various mechanisms of the step–step interactions. Our finding offers a significant clue to understanding the general mechanism of melt growth beyond ice-crystal growth, inseparably involving several broad research fields, including cryobiological, geophysical, and material branches. National Academy of Sciences 2022-03-01 2022-03-08 /pmc/articles/PMC8915970/ /pubmed/35238661 http://dx.doi.org/10.1073/pnas.2115955119 Text en Copyright © 2022 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/This article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Physical Sciences
Murata, Ken-ichiro
Sato, Masahide
Uwaha, Makio
Saito, Fumiaki
Nagashima, Ken
Sazaki, Gen
Step-bunching instability of growing interfaces between ice and supercooled water
title Step-bunching instability of growing interfaces between ice and supercooled water
title_full Step-bunching instability of growing interfaces between ice and supercooled water
title_fullStr Step-bunching instability of growing interfaces between ice and supercooled water
title_full_unstemmed Step-bunching instability of growing interfaces between ice and supercooled water
title_short Step-bunching instability of growing interfaces between ice and supercooled water
title_sort step-bunching instability of growing interfaces between ice and supercooled water
topic Physical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8915970/
https://www.ncbi.nlm.nih.gov/pubmed/35238661
http://dx.doi.org/10.1073/pnas.2115955119
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