晶体和无定形纳米粒子的奥斯特瓦尔德熟化。

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Soft Matter Pub Date : 2025-02-25 DOI:10.1039/D4SM01544D

Manja Annette Behrens, Alexandra Franzén, Sara Carlert, Urban Skantze, Lennart Lindfors and Ulf Olsson

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引用次数: 0

摘要

比较了一种模型有机化合物的结晶纳米粒子分散体和无定形纳米粒子分散体的奥斯特瓦尔德熟化过程。无定形纳米粒子在几分钟的时间尺度内迅速成熟，而晶体纳米粒子在几周的时间尺度内不会成熟。我们发现了晶体生长的 "可转移区"（可能涉及自由能障碍），并认为这就是纳米晶体分散体中没有奥斯特瓦尔德熟化的原因。由于奥斯特瓦尔德熟化是一个通常发生在平衡附近的过程，即使很小的障碍也可能阻止熟化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

On the Ostwald ripening of crystalline and amorphous nanoparticles

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On the Ostwald ripening of crystalline and amorphous nanoparticles

Ostwald ripening of crystalline and amorphous nanoparticle dispersions of a model organic compound are compared. While amorphous nanoparticles show a rapid ripening on the timescale of minutes, the crystalline nanoparticles do not ripen within the timescale of weeks. A metastable zone for crystal growth, presumably involving a free energy barrier, is identified, and we propose that this explains the absence of Ostwald ripening in the nanocrystal dispersion. As Ostwald ripening is a process typically occurring near equilibrium, even a small barrier may prevent ripening.

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来源期刊

Soft Matter 工程技术-材料科学：综合

CiteScore

6.00

自引率

5.90%

发文量

891

审稿时长

1.9 months

期刊介绍： Soft Matter is an international journal published by the Royal Society of Chemistry using Engineering-Materials Science: A Synthesis as its research focus. It publishes original research articles, review articles, and synthesis articles related to this field, reporting the latest discoveries in the relevant theoretical, practical, and applied disciplines in a timely manner, and aims to promote the rapid exchange of scientific information in this subject area. The journal is an open access journal. The journal is an open access journal and has not been placed on the alert list in the last three years.