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Reversible disorder-order transitions in atomic crystal nucleation

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Title
Reversible disorder-order transitions in atomic crystal nucleation
Author(s)
Sungho Jeon; Taeyeong Heo; Sang-Yeon Hwang; Jim Ciston; Karen C. Bustillo; Bryan W. Reed; Jimin Ham; NANOMAT; NANOMAT; Joowon Lim; Kitaek Lim; NANOMAT; NANOMAT; Ruth S. Bloom; Sukjoon Hong; Kwanpyo Kim; Alex Zettl; Woo Youn Kim; Peter Ercius; NANOMAT; Won Chul Lee
Publication Date
2021-01
Journal
SCIENCE, v.371, no.6528, pp.498 - 503
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Abstract
Nucleation in atomic crystallization remains poorly understood, despite advances in classical nucleation theory. The nucleation process has been described to involve a nonclassical mechanism that includes a spontaneous transition from disordered to crystalline states, but a detailed understanding of dynamics requires further investigation. In situ electron microscopy of heterogeneous nucleation of individual gold nanocrystals with millisecond temporal resolution shows that the early stage of atomic crystallization proceeds through dynamic structural fluctuations between disordered and crystalline states, rather than through a single irreversible transition. Our experimental and theoretical analyses support the idea that structural fluctuations originate from size-dependent thermodynamic stability of the two states in atomic dusters. These findings, based on dynamics in a real atomic system, reshape and improve our understanding of nucleation mechanisms in atomic crystallization.
URI
https://pr.ibs.re.kr/handle/8788114/9457
DOI
10.1126/science.aaz7555
ISSN
0036-8075
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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