Multidirectional colloidal assembly in concurrent electric and magnetic fields

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dc.contributor.authorBharti, Bhuvnesh
dc.contributor.authorKogler, Florian
dc.contributor.authorHall, Carol K.
dc.contributor.authorKlapp, Sabine H. L.
dc.contributor.authorVelev, Orlin D.
dc.date.accessioned2017-10-24T07:15:15Z
dc.date.available2017-10-24T07:15:15Z
dc.date.issued2016
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractDipolar interactions between nano- and micron sized colloids lead to their assembly into domains with well-defined local order. The particles with a single dipole induced by an external field assemble into linear chains and clusters. However, to achieve the formation of multidirectionally organized nano-or microassemblies with tunable physical characteristics, more sophisticated interaction tools are needed. Here we demonstrate that such complex interactions can be introduced in the form of two independent, non-interacting dipoles (double-dipoles) within a microparticle. We show how this can be achieved by the simultaneous application of alternating current (AC)-electric field and uniform magnetic field to dispersions of superparamagnetic microspheres. Depending on their timing and intensity, concurrent electric and magnetic fields lead to the formation of bidirectional particle chains, colloidal networks, and discrete crystals. We investigate the mechanistic details of the assembly process, and identify and classify the non-equilibrium states formed. The morphologies of different experimental states are in excellent correlation with our theoretical predictions based on Brownian dynamics simulations combined with a structural analysis based on local energy parameters. This novel methodology of introducing and interpreting double-dipolar particle interactions may assist in the assembly of colloidal coatings, dynamically reconfigurable particle networks, and bidirectional active structures.en
dc.description.sponsorshipDFG, GRK 1524, Self-Assembled Soft-Matter Nanostructures at Interfacesen
dc.identifier.eissn1744-6848
dc.identifier.issn1744-683X
dc.identifier.pmid27537850
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/6895
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6234
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc530 Physikde
dc.titleMultidirectional colloidal assembly in concurrent electric and magnetic fieldsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c6sm01475e
dcterms.bibliographicCitation.issue37
dcterms.bibliographicCitation.journaltitleSoft matteren
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend7758
dcterms.bibliographicCitation.pagestart7747
dcterms.bibliographicCitation.volume12
tub.accessrights.dnbdomain
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Theoretische Physik::FG Computersimulationen und Theorie komplexer Fluidede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Computersimulationen und Theorie komplexer Fluidede
tub.affiliation.instituteInst. Theoretische Physikde
tub.publisher.universityorinstitutionTechnische Universität Berlin

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