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Article: Microfluidic generation of aqueous two-phase-system (ATPS) droplets by oil-droplet choppers

TitleMicrofluidic generation of aqueous two-phase-system (ATPS) droplets by oil-droplet choppers
Authors
Keywordsanalytic method
aqueous solution
aqueous two phase system
density
experimental study
Issue Date2017
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/loc
Citation
Lab On a Chip, 2017, v. 17 n. 19, p. 3310-3317 How to Cite?
AbstractExisting approaches for droplet generation with ultra-low interfacial tension of aqueous two-phase systems, ATPS, are either constricted by a narrow range of flow conditions using passive methods or subjected to complex chip fabrication with the integration of external components using active actuation. To address these issues, we present a simple approach to producing uniform ATPS droplets facilitated by oil-droplet choppers in microfluidics. Our solution counts on the synchronized formation of high-interfacial-tension oil-in-water and low-interfacial-tension water-in-water droplets, where the ATPS interface is distorted by oil droplets and decays into water-in-water droplets. In the synchronization regime, the size and generation frequency of ATPS droplets can be controlled independently by tuning the flow rates of the dispersed aqueous and oil phases, respectively. Our method demonstrates high uniformity of droplets (coefficient of variation between 0.75% and 2.45%), a wide range of available droplet size (droplet radius from 5[small mu ]m to 180 [small mu ]m), and a maximum generation frequency of about 2.1 kHz that is nearly two orders of magnitude faster than that in existing methods. We develop theoretical models to precisely predict the minimum and maximum frequency of droplet generation and the droplet size. The produced ATPS droplets and oil choppers are separated in channel using the difference in density. Our method would boost emulsion-based biological applications such as cell encapsulation, biomolecule delivery, bioreactors, and biomaterials synthesis with ATPS droplets.
Persistent Identifierhttp://hdl.handle.net/10722/272920
ISSN
2017 Impact Factor: 5.995
2015 SCImago Journal Rankings: 2.373

 

DC FieldValueLanguage
dc.contributor.authorZhou, C-
dc.contributor.authorZhu, P-
dc.contributor.authorTian, Y-
dc.contributor.authorTang, X-
dc.contributor.authorShi, R-
dc.contributor.authorWang, L-
dc.date.accessioned2019-08-06T09:19:04Z-
dc.date.available2019-08-06T09:19:04Z-
dc.date.issued2017-
dc.identifier.citationLab On a Chip, 2017, v. 17 n. 19, p. 3310-3317-
dc.identifier.issn1473-0197-
dc.identifier.urihttp://hdl.handle.net/10722/272920-
dc.description.abstractExisting approaches for droplet generation with ultra-low interfacial tension of aqueous two-phase systems, ATPS, are either constricted by a narrow range of flow conditions using passive methods or subjected to complex chip fabrication with the integration of external components using active actuation. To address these issues, we present a simple approach to producing uniform ATPS droplets facilitated by oil-droplet choppers in microfluidics. Our solution counts on the synchronized formation of high-interfacial-tension oil-in-water and low-interfacial-tension water-in-water droplets, where the ATPS interface is distorted by oil droplets and decays into water-in-water droplets. In the synchronization regime, the size and generation frequency of ATPS droplets can be controlled independently by tuning the flow rates of the dispersed aqueous and oil phases, respectively. Our method demonstrates high uniformity of droplets (coefficient of variation between 0.75% and 2.45%), a wide range of available droplet size (droplet radius from 5[small mu ]m to 180 [small mu ]m), and a maximum generation frequency of about 2.1 kHz that is nearly two orders of magnitude faster than that in existing methods. We develop theoretical models to precisely predict the minimum and maximum frequency of droplet generation and the droplet size. The produced ATPS droplets and oil choppers are separated in channel using the difference in density. Our method would boost emulsion-based biological applications such as cell encapsulation, biomolecule delivery, bioreactors, and biomaterials synthesis with ATPS droplets.-
dc.languageeng-
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/loc-
dc.relation.ispartofLab On a Chip-
dc.subjectanalytic method-
dc.subjectaqueous solution-
dc.subjectaqueous two phase system-
dc.subjectdensity-
dc.subjectexperimental study-
dc.titleMicrofluidic generation of aqueous two-phase-system (ATPS) droplets by oil-droplet choppers-
dc.typeArticle-
dc.identifier.emailWang, L: lqwang@hku.hk-
dc.identifier.authorityWang, L=rp00184-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/C7LC00696A-
dc.identifier.pmid28861566-
dc.identifier.scopuseid_2-s2.0-85030115142-
dc.identifier.hkuros300438-
dc.identifier.volume17-
dc.identifier.issue19-
dc.identifier.spage3310-
dc.identifier.epage3317-
dc.publisher.placeUnited Kingdom-

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