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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
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
2023-05-01
Volume637Pages:522-532
ISSN0021-9797
Abstract

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.

KeywordEvaporation Drop Self -assembled pattern Contact line Film stability
DOI10.1016/j.jcis.2023.01.102
Indexed BySCI ; EI
Language英语
WOS IDWOS:000926577500001
WOS KeywordINSTABILITIES ; DEPOSITS ; DROPLET ; SESSILE ; STAINS ; FILMS ; FLOW
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding ProjectNational Natural Science Foundation of China (NSFC)[12072346] ; National Natural Science Foundation of China (NSFC)[12032019]
Funding OrganizationNational Natural Science Foundation of China (NSFC)
Classification二类/Q1
Ranking1
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/91683
Collection非线性力学国家重点实验室
Corresponding AuthorYuan QZ(袁泉子)
Affiliation1.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
Recommended Citation
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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