Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass

Abstract Crystallization from amorphous solids is generally caused by activating phonons in a wide frequency range during heat treatment. In contrast, the activation of phonons in a narrow frequency range using ultrasonic treatment also causes crystallization below the glass transition temperature....

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Autores principales:	Nobutomo Nakamura, Shizuka Nakashima, Hirotsugu Ogi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/68e37fb058eb42a1a787981c98fc3f4c
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spelling	oai:doaj.org-article:68e37fb058eb42a1a787981c98fc3f4c2021-12-02T15:09:14ZMechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass10.1038/s41598-019-49120-12045-2322https://doaj.org/article/68e37fb058eb42a1a787981c98fc3f4c2019-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-49120-1https://doaj.org/toc/2045-2322Abstract Crystallization from amorphous solids is generally caused by activating phonons in a wide frequency range during heat treatment. In contrast, the activation of phonons in a narrow frequency range using ultrasonic treatment also causes crystallization below the glass transition temperature. These behaviors indicate that crystallization is related to the atomic motion in the glass state, and it is suggested that the activation of specific atomic motion can cause crystallization without increasing temperature. In this study, we observe nucleation and nuclei growth caused by mechanical oscillation in a hard-sphere colloidal glass and evaluate the effect of mechanical oscillation on the structural evolution in the early stage of the crystallization. Oscillation between 5 and 100 Hz is applied to the colloidal glass, and it is observed that the nucleation rate increases under the 70 Hz oscillation, resulting in formation of stable nuclei in a short amount of time. The nuclei growth is also accelerated by the 70 Hz oscillation, whereas increases in the nucleation rate and nuclei growth were not observed at other frequencies. Finally, activation of the diffusion-based rattling of particles by caging is considered as a possible mechanism of the observations.Nobutomo NakamuraShizuka NakashimaHirotsugu OgiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-9 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nobutomo Nakamura Shizuka Nakashima Hirotsugu Ogi Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
description	Abstract Crystallization from amorphous solids is generally caused by activating phonons in a wide frequency range during heat treatment. In contrast, the activation of phonons in a narrow frequency range using ultrasonic treatment also causes crystallization below the glass transition temperature. These behaviors indicate that crystallization is related to the atomic motion in the glass state, and it is suggested that the activation of specific atomic motion can cause crystallization without increasing temperature. In this study, we observe nucleation and nuclei growth caused by mechanical oscillation in a hard-sphere colloidal glass and evaluate the effect of mechanical oscillation on the structural evolution in the early stage of the crystallization. Oscillation between 5 and 100 Hz is applied to the colloidal glass, and it is observed that the nucleation rate increases under the 70 Hz oscillation, resulting in formation of stable nuclei in a short amount of time. The nuclei growth is also accelerated by the 70 Hz oscillation, whereas increases in the nucleation rate and nuclei growth were not observed at other frequencies. Finally, activation of the diffusion-based rattling of particles by caging is considered as a possible mechanism of the observations.
format	article
author	Nobutomo Nakamura Shizuka Nakashima Hirotsugu Ogi
author_facet	Nobutomo Nakamura Shizuka Nakashima Hirotsugu Ogi
author_sort	Nobutomo Nakamura
title	Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
title_short	Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
title_full	Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
title_fullStr	Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
title_full_unstemmed	Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
title_sort	mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/68e37fb058eb42a1a787981c98fc3f4c
work_keys_str_mv	AT nobutomonakamura mechanicaloscillationacceleratingnucleationandnucleigrowthinhardspherecolloidalglass AT shizukanakashima mechanicaloscillationacceleratingnucleationandnucleigrowthinhardspherecolloidalglass AT hirotsuguogi mechanicaloscillationacceleratingnucleationandnucleigrowthinhardspherecolloidalglass
_version_	1718387878775488512

Mechanical oscillation accelerating nucleation and nuclei growth in hard-sphere colloidal glass

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