Ferrofluid Microdroplet Splitting for Population-Based Microfluidics and Interfacial Tensiometry

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorLatikka, Mikaen_US
dc.contributor.authorBackholm, Matildaen_US
dc.contributor.authorBaidya, Avijiten_US
dc.contributor.authorBallesio, Albertoen_US
dc.contributor.authorServe, Amandineen_US
dc.contributor.authorBeaune, Grégoryen_US
dc.contributor.authorTimonen, Jaakko V.I.en_US
dc.contributor.authorPradeep, Thalappilen_US
dc.contributor.authorRas, Robin H.A.en_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.departmentDepartment of Chemistryen
dc.contributor.departmentDepartment of Bioproducts and Biosystemsen
dc.contributor.groupauthorSoft Matter and Wettingen
dc.contributor.groupauthorActive Matteren
dc.contributor.organizationIndian Institute of Technology Madrasen_US
dc.date.accessioned2020-07-03T11:06:30Z
dc.date.available2020-07-03T11:06:30Z
dc.date.issued2020-07en_US
dc.description| openaire: EC/H2020/725513/EU//SuperRepel
dc.description.abstractFerrofluids exhibit a unique combination of liquid properties and strong magnetic response, which leads to a rich variety of interesting functional properties. Here, the magnetic-field-induced splitting of ferrofluid droplets immersed in an immiscible liquid is presented, and related fascinating dynamics and applications are discussed. A magnetic field created by a permanent magnet induces instability on a mother droplet, which divides into two daughter droplets in less than 0.1 s. During the splitting process, the droplet undergoes a Plateau–Rayleigh-like instability, which is investigated using high-speed imaging. The dynamics of the resulting satellite droplet formation is shown to depend on the roughness of the supporting surface. Further increasing the field results in additional splitting events and self-assembly of microdroplet populations, which can be magnetically actuated. The effects of magnetization and interfacial tension are systematically investigated by varying magnetic nanoparticles and surfactant concentrations, and a variety of outcomes from labyrinthine patterns to discrete droplets are observed. As the splitting process depends on interfacial tension, the droplet splitting can be used as a measure for interfacial tension as low as 0.1 mN m−1. Finally, a population-based digital microfluidics concept based on the self-assembled microdroplets is presented.en
dc.description.versionPeer revieweden
dc.format.extent1-8
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationLatikka, M, Backholm, M, Baidya, A, Ballesio, A, Serve, A, Beaune, G, Timonen, J V I, Pradeep, T & Ras, R H A 2020, ' Ferrofluid Microdroplet Splitting for Population-Based Microfluidics and Interfacial Tensiometry ', Advanced Science, vol. 7, no. 14, 2000359, pp. 1-8 . https://doi.org/10.1002/advs.202000359en
dc.identifier.doi10.1002/advs.202000359en_US
dc.identifier.issn2198-3844
dc.identifier.otherPURE UUID: 06ed1b5b-e46e-418f-881e-2103c76334c4en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/06ed1b5b-e46e-418f-881e-2103c76334c4en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85086166526&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/43910954/advs.202000359.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/45302
dc.identifier.urnURN:NBN:fi:aalto-202007034259
dc.language.isoenen
dc.publisherWiley
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/725513/EU//SuperRepelen_US
dc.relation.ispartofseriesAdvanced Scienceen
dc.rightsopenAccessen
dc.subject.keywordferrofluidsen_US
dc.subject.keywordfluid dynamicsen_US
dc.subject.keywordinterfacial tensionen_US
dc.subject.keywordmagnetic fieldsen_US
dc.subject.keywordmagnetic nanoparticlesen_US
dc.subject.keywordmicrofluidicsen_US
dc.titleFerrofluid Microdroplet Splitting for Population-Based Microfluidics and Interfacial Tensiometryen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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