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공과대학
화공신소재공학과
Journal papers
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Deterministic Formation and Growth of Dendritic Crystals of Attractive Colloids
Title
Deterministic Formation and Growth of Dendritic Crystals of Attractive Colloids
Authors
Park
;
Sanghyuk
;
Hwang
;
Hyerim
;
Kim
;
Shin-Hyun
Ewha Authors
황혜림
SCOPUS Author ID
황혜림
Issue Date
2024
Journal Title
Small
ISSN
1613-6810
Citation
Small vol. 20, no. 29
Keywords
colloidal crystals
;
dendritic growth
;
depletion force
;
diffusion-limited systems
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
Dendrites are ubiquitous crystals produced in supersaturated solutions and supercooled melts, but considerably less is known about their formation and growth kinetics. Here, the key factors are explored that dictate dendrite formation and growth, utilizing experimental colloidal models in which the particles act as molecules with Mie potential. Depletion attraction is employed to colloids and manipulate their strength to control supersaturation. Dendrites are predominantly produced under conditions of low supersaturation, where the separation between crystals is large due to slow nucleation. The dendrites do not emerge directly from nuclei. Instead, isotropic grains, initially produced from nuclei, morph into polygons. Arms then sprout from the vertices of these polygons, eventually giving rise to dendrites. Triggering this polygon-to-dendrite transformation requires a high diffusional flux. This necessitates a prolonged diffusion time to maintain a steep concentration gradient in the surrounding environment even after the transformation from circular grains to polygons. © 2024 Wiley-VCH GmbH.
DOI
10.1002/smll.202311543
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