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Article: Hanging droplets from liquid surfaces

TitleHanging droplets from liquid surfaces
Authors
Keywordscompartmentalization
hanging droplets
biomimetic
aqueous two-phase system
droplet
Issue Date2020
PublisherNational Academy of Sciences. The Journal's web site is located at http://www.pnas.org
Citation
Proceedings of the National Academy of Sciences, 2020, v. 117 n. 15, p. 8360-8365 How to Cite?
AbstractNatural and man-made robotic systems use the interfacial tension between two fluids to support dense objects on liquid surfaces. Here, we show that coacervate-encased droplets of an aqueous polymer solution can be hung from the surface of a less dense aqueous polymer solution using surface tension. The forces acting on and the shapes of the hanging droplets can be controlled. Sacs with homogeneous and heterogeneous surfaces are hung from the surface and, by capillary forces, form well-ordered arrays. Locomotion and rotation can be achieved by embedding magnetic microparticles within the assemblies. Direct contact of the droplet with air enables in situ manipulation and compartmentalized cascading chemical reactions with selective transport. Applications including functional microreactors, motors, and biomimetic robots are evident.
Persistent Identifierhttp://hdl.handle.net/10722/289760
ISSN
2023 Impact Factor: 9.4
2023 SCImago Journal Rankings: 3.737
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorXie, G-
dc.contributor.authorForth, J-
dc.contributor.authorZHU, S-
dc.contributor.authorHelms, BA-
dc.contributor.authorAshby, PD-
dc.contributor.authorShum, HC-
dc.contributor.authorRussell, TP-
dc.date.accessioned2020-10-22T08:17:05Z-
dc.date.available2020-10-22T08:17:05Z-
dc.date.issued2020-
dc.identifier.citationProceedings of the National Academy of Sciences, 2020, v. 117 n. 15, p. 8360-8365-
dc.identifier.issn0027-8424-
dc.identifier.urihttp://hdl.handle.net/10722/289760-
dc.description.abstractNatural and man-made robotic systems use the interfacial tension between two fluids to support dense objects on liquid surfaces. Here, we show that coacervate-encased droplets of an aqueous polymer solution can be hung from the surface of a less dense aqueous polymer solution using surface tension. The forces acting on and the shapes of the hanging droplets can be controlled. Sacs with homogeneous and heterogeneous surfaces are hung from the surface and, by capillary forces, form well-ordered arrays. Locomotion and rotation can be achieved by embedding magnetic microparticles within the assemblies. Direct contact of the droplet with air enables in situ manipulation and compartmentalized cascading chemical reactions with selective transport. Applications including functional microreactors, motors, and biomimetic robots are evident.-
dc.languageeng-
dc.publisherNational Academy of Sciences. The Journal's web site is located at http://www.pnas.org-
dc.relation.ispartofProceedings of the National Academy of Sciences-
dc.rightsProceedings of the National Academy of Sciences. Copyright © National Academy of Sciences.-
dc.subjectcompartmentalization-
dc.subjecthanging droplets-
dc.subjectbiomimetic-
dc.subjectaqueous two-phase system-
dc.subjectdroplet-
dc.titleHanging droplets from liquid surfaces-
dc.typeArticle-
dc.identifier.emailShum, HC: ashum@hku.hk-
dc.identifier.authorityShum, HC=rp01439-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1073/pnas.1922045117-
dc.identifier.pmid32220955-
dc.identifier.pmcidPMC7165464-
dc.identifier.scopuseid_2-s2.0-85083258989-
dc.identifier.hkuros317472-
dc.identifier.volume117-
dc.identifier.issue15-
dc.identifier.spage8360-
dc.identifier.epage8365-
dc.identifier.isiWOS:000526871700025-
dc.publisher.placeUnited States-
dc.identifier.issnl0027-8424-

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