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Reversible disorder-order transitions in atomic crystal nucleation

Title
Reversible disorder-order transitions in atomic crystal nucleation
Author
홍석준
Issue Date
2021-01
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Citation
SCIENCE, v. 371, Issue. 6528, Page. 498-503
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 clusters. These findings, based on dynamics in a real atomic system, reshape and improve our understanding of nucleation mechanisms in atomic crystallization.
URI
https://escholarship.org/uc/item/9sn619tzhttps://www.science.org/doi/full/10.1126/science.aaz7555https://repository.hanyang.ac.kr/handle/20.500.11754/167019
DOI
10.1126/science.aaz7555
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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