受限制的胶体液滴干燥后形成圆形迷宫

IF 9.1 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Proceedings of the National Academy of Sciences of the United States of America Pub Date : 2025-08-04 DOI:10.1073/pnas.2508363122

Ilaria Beechey-Newman, Natalya Kizilova, Andreas Andersen Hennig, Eirik Grude Flekkøy, Erika Eiser

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引用次数: 0

摘要

在干燥过程中，含有颗粒的无根液滴会留下所谓的咖啡渍环。这种现象是众所周知的，也是很容易理解的（Deegan et al ., Nature 389, 827-829(1997)）。在这里，我们展示了当被限制在狭缝中的含颗粒液滴被允许非常缓慢地蒸发时，它们不会沉积咖啡环，而是形成令人惊讶的复杂的圆形迷宫状图案。我们提出的实验说明了这种模式的形成，并讨论了决定这种模式何时形成的因素。我们还没有听说过在封闭条件下形成如此美丽图案的自然例子，尽管它们似乎很可能存在。

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Confined colloidal droplets dry to form circular mazes

During drying, particle-laden sessile droplets will leave so-called coffee-stain rings behind. This phenomenon is well known and well understood (Deegan et al ., Nature 389 , 827–829 (1997). Here, we show that when particle-laden droplets confined in a slit are allowed to evaporate very slowly, they do not deposit coffee rings, but form surprisingly intricate, circular maze-like patterns. We present experiments that illustrate this pattern formation and discuss the factors that determine when such patterns can form. We are not aware of reports of natural examples of the formation of such beautiful patterns under confinement, although it seems likely that they exist.

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来源期刊

Proceedings of the National Academy of Sciences of the United States of America 综合性期刊-综合性期刊

CiteScore

19.00

自引率

0.90%

发文量

3575

审稿时长

2.5 months

期刊介绍： The Proceedings of the National Academy of Sciences (PNAS), a peer-reviewed journal of the National Academy of Sciences (NAS), serves as an authoritative source for high-impact, original research across the biological, physical, and social sciences. With a global scope, the journal welcomes submissions from researchers worldwide, making it an inclusive platform for advancing scientific knowledge.