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Article: Passive and active droplet generation with microfluidics: a review

TitlePassive and active droplet generation with microfluidics: a review
Authors
Keywordsalternating current
capillary pressure
Coriolis phenomenon
electric field
electrowetting
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. 1, p. 34-75 How to Cite?
AbstractPrecise and effective control of droplet generation is critical for applications of droplet microfluidics ranging from materials synthesis to lab-on-a-chip systems. Methods for droplet generation can be either passive or active, where the former generates droplets without external actuation, and the latter makes use of additional energy input in promoting interfacial instabilities for droplet generation. A unified physical understanding of both passive and active droplet generation is beneficial for effectively developing new techniques meeting various demands arising from applications. Our review of passive approaches focuses on the characteristics and mechanisms of breakup modes of droplet generation occurring in microfluidic cross-flow, co-flow, flow-focusing, and step emulsification configurations. The review of active approaches covers the state-of-the-art techniques employing either external forces from electrical, magnetic and centrifugal fields or methods of modifying intrinsic properties of flows or fluids such as velocity, viscosity, interfacial tension, channel wettability, and fluid density, with a focus on their implementations and actuation mechanisms. Also included in this review is the contrast among different approaches of either passive or active nature.
Persistent Identifierhttp://hdl.handle.net/10722/272919
ISSN
2019 Impact Factor: 6.774
2015 SCImago Journal Rankings: 2.373

 

DC FieldValueLanguage
dc.contributor.authorZhu, P-
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. 1, p. 34-75-
dc.identifier.issn1473-0197-
dc.identifier.urihttp://hdl.handle.net/10722/272919-
dc.description.abstractPrecise and effective control of droplet generation is critical for applications of droplet microfluidics ranging from materials synthesis to lab-on-a-chip systems. Methods for droplet generation can be either passive or active, where the former generates droplets without external actuation, and the latter makes use of additional energy input in promoting interfacial instabilities for droplet generation. A unified physical understanding of both passive and active droplet generation is beneficial for effectively developing new techniques meeting various demands arising from applications. Our review of passive approaches focuses on the characteristics and mechanisms of breakup modes of droplet generation occurring in microfluidic cross-flow, co-flow, flow-focusing, and step emulsification configurations. The review of active approaches covers the state-of-the-art techniques employing either external forces from electrical, magnetic and centrifugal fields or methods of modifying intrinsic properties of flows or fluids such as velocity, viscosity, interfacial tension, channel wettability, and fluid density, with a focus on their implementations and actuation mechanisms. Also included in this review is the contrast among different approaches of either passive or active nature.-
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.subjectalternating current-
dc.subjectcapillary pressure-
dc.subjectCoriolis phenomenon-
dc.subjectelectric field-
dc.subjectelectrowetting-
dc.titlePassive and active droplet generation with microfluidics: a review-
dc.typeArticle-
dc.identifier.emailWang, L: lqwang@hku.hk-
dc.identifier.authorityWang, L=rp00184-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/C6LC01018K-
dc.identifier.pmid27841886-
dc.identifier.scopuseid_2-s2.0-85006866941-
dc.identifier.hkuros300437-
dc.identifier.volume17-
dc.identifier.issue1-
dc.identifier.spage34-
dc.identifier.epage75-
dc.publisher.placeUnited Kingdom-

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