| Marangoni effect reverses coffee-ring depositions. | |
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MedLine Citation:
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PMID: 16599468 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We show here both experimentally and theoretically that the formation of "coffee-ring" deposits observed at the edge of drying water droplets requires not only a pinned contact line but also suppression of Marangoni flow. For simple organic fluids, deposition actually occurs preferentially at the center of the droplet, due to a recirculatory flow driven by surface-tension gradients produced by the latent heat of evaporation. The manipulation of this Marangoni flow in a drying droplet should allow one in principle to control and redirect evaporation-driven deposition and assembly of colloids and other materials. |
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Authors:
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Hua Hu; Ronald G Larson |
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Publication Detail:
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Type: Letter |
Journal Detail:
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Title: The journal of physical chemistry. B Volume: 110 ISSN: 1520-6106 ISO Abbreviation: J Phys Chem B Publication Date: 2006 Apr |
Date Detail:
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Created Date: 2006-04-07 Completed Date: 2007-07-24 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101157530 Medline TA: J Phys Chem B Country: United States |
Other Details:
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Languages: eng Pagination: 7090-4 Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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