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Evaporation-induced fractal patterns: A bridge between uniform pattern and coffee ring
Wang FS(王富帅); Yuan QZ(袁泉子)1
发表期刊JOURNAL OF COLLOID AND INTERFACE SCIENCE
2023-05-01
卷号637页码:522-532
ISSN0021-9797
摘要

Hypothesis: The rich variety of patterns induced by evaporating drops containing particles has significant guidance for coating processes, inkjet printing, and nanosemiconductors. However, most existing works construct a uniform pattern by suppressing the coffee ring effect, and establishing the connection between them is still an academic challenge.Experiments: We report uniform, polygonal, and coffee ring patterns obtained by adjusting the solute concentration that sets in when an ethanol drop with dissolved ibuprofen is deposited on a silicon wafer. Findings: Pattern formation involves rich hydrodynamic events: spreading, evaporative instability, dewetting, film formation, and particle deposition. Based on the distinct multiscale properties, this series of patterns is directly connected from the perspective of fractal geometry, which allows us to name them "fractal deposition patterns". A theoretical model considering film stability is established to explain the mechanism behind pattern formation, which is well verified by experiments. This work has presented a unique strategy that can directly connect uniform, polygonal, and coffee ring patterns under the same physics, hoping to provide instructive guidance for practical applications.(c) 2023 Elsevier Inc. All rights reserved.

关键词Evaporation Drop Self -assembled pattern Contact line Film stability
DOI10.1016/j.jcis.2023.01.102
收录类别SCI ; EI
语种英语
WOS记录号WOS:000926577500001
关键词[WOS]INSTABILITIES ; DEPOSITS ; DROPLET ; SESSILE ; STAINS ; FILMS ; FLOW
WOS研究方向Chemistry
WOS类目Chemistry, Physical
资助项目National Natural Science Foundation of China (NSFC)[12072346] ; National Natural Science Foundation of China (NSFC)[12032019]
项目资助者National Natural Science Foundation of China (NSFC)
论文分区二类/Q1
力学所作者排名1
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/91683
专题非线性力学国家重点实验室
通讯作者Yuan QZ(袁泉子)
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Wang FS,Yuan QZ. Evaporation-induced fractal patterns: A bridge between uniform pattern and coffee ring[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2023,637:522-532.
APA Wang FS,&Yuan QZ.(2023).Evaporation-induced fractal patterns: A bridge between uniform pattern and coffee ring.JOURNAL OF COLLOID AND INTERFACE SCIENCE,637,522-532.
MLA Wang FS,et al."Evaporation-induced fractal patterns: A bridge between uniform pattern and coffee ring".JOURNAL OF COLLOID AND INTERFACE SCIENCE 637(2023):522-532.
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