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dc.creatorFernández Mateo, Raúles
dc.creatorMorgan, Hyweles
dc.creatorRamos Reyes, Antonioes
dc.creatorGarcía Sánchez, Pabloes
dc.date.accessioned2023-01-30T15:09:18Z
dc.date.available2023-01-30T15:09:18Z
dc.date.issued2023
dc.identifier.citationFernandez Mateo, R., Morgan, H., Ramos Reyes, A. y García Sánchez, P. (2023). Wall Repulsion during Electrophoresis: Testing the Theory of Concentration-Polarization Electroosmosis. Physics of Fluids, 35 (1), 012019. https://doi.org/10.1063/5.0134307.
dc.identifier.issn1070-6631es
dc.identifier.issn1089-7666es
dc.identifier.urihttps://hdl.handle.net/11441/142157
dc.description.abstractWe experimentally study the repulsion of charged microscopic particles with the channel walls during electrophoresis in microfluidic devices. For low frequencies of the electric fields (< 10 kHz), this repulsion is mainly due to the hydrodynamic interaction caused by the flow vortices that arise from the slip velocity induced by the electric field on the particle surface, as shown in a recent publication [Fernandez-Mateo et al., Physical Review Letters, 128, 074501, (2022)]. The maximum slip velocity on the particle surface is inferred from measurements of wall-particle separation. Importantly, this procedure allows us to infer very small slip velocities that otherwise are too weak to be measured directly. Data at small electric field amplitudes (E0) agree with theoretical predictions using the model of Concentration Polarization Electroosmosis (CPEO), which has recently been proposed as the mechanism behind the flow vortices on the surface of the particles. Data for higher electric fields show that the predictions of the CPEO theory for weak electric fields are not valid beyond E0 ∼ 60 kV/m. Additionally, we also show that, for sufficiently strong electric fields, the quadrupolar flow structures become disrupted, leading to a weaker wall repulsion.es
dc.description.sponsorshipMinisterio de Ciencia e Innovación PGC2018-099217-B-I00, 10.13039/501100011033es
dc.formatapplication/pdfes
dc.format.extent15 p.es
dc.language.isoenges
dc.publisherAIP Publishinges
dc.relation.ispartofPhysics of Fluids, 35 (1), 012019.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleWall Repulsion during Electrophoresis: Testing the Theory of Concentration-Polarization Electroosmosises
dc.typeinfo:eu-repo/semantics/articlees
dcterms.identifierhttps://ror.org/03yxnpp24
dc.type.versioninfo:eu-repo/semantics/acceptedVersiones
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.contributor.affiliationUniversidad de Sevilla. Departamento de Electrónica y Electromagnetismoes
dc.relation.projectIDPGC2018-099217-B-I00es
dc.relation.publisherversionhttps://dx.doi.org/10.1063/5.0134307es
dc.identifier.doi10.1063/5.0134307es
dc.journaltitlePhysics of Fluidses
dc.publication.volumen35es
dc.publication.issue1es
dc.publication.initialPage012019es
dc.contributor.funderMinisterio de Ciencia e Innovación (MICIN). Españaes
dc.contributor.funderAgencia Estatal de Investigación. España
dc.contributor.funderEuropean Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER)

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