Dynamical self-assembly of dipolar active Brownian particles in two dimensions

dc.contributor.authorLiao, Guo-Jun
dc.contributor.authorHall, Carol K.
dc.contributor.authorKlapp, Sabine H. L.
dc.date.accessioned2020-04-22T13:53:50Z
dc.date.available2020-04-22T13:53:50Z
dc.date.issued2020-02-24
dc.description.abstractBased on Brownian Dynamics (BD) simulations, we study the dynamical self-assembly of active Brownian particles with dipole–dipole interactions, stemming from a permanent point dipole at the particle center. The propulsion direction of each particle is chosen to be parallel to its dipole moment. We explore a wide range of motilities and dipolar coupling strengths and characterize the corresponding behavior based on several order parameters. At low densities and low motilities, the most important structural phenomenon is the aggregation of the dipolar particles into chains. Upon increasing the particle motility, these chain-like structures break, and the system transforms into a weakly correlated isotropic fluid. At high densities, we observe that the motility-induced phase separation is strongly suppressed by the dipolar coupling. Once the dipolar coupling dominates the thermal energy, the phase separation disappears, and the system rather displays a flocking state, where particles form giant clusters and move collective along one direction. We provide arguments for the emergence of the flocking behavior, which is absent in the passive dipolar system.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel - 2020en
dc.description.sponsorshipDFG, 65143814, GRK 1524: Self-Assembled Soft-Matter Nanostructures at Interfacesen
dc.identifier.eissn1744-6848
dc.identifier.issn1744-683X
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/10992
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-9884
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.otherdipole–dipole interactionsen
dc.subject.otherBrownian particlesen
dc.subject.otherdipolar couplingen
dc.subject.otherphase separationen
dc.titleDynamical self-assembly of dipolar active Brownian particles in two dimensionsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/C9SM01539Fen
dcterms.bibliographicCitation.journaltitleSoft Matteren
dcterms.bibliographicCitation.originalpublishernameRSC Publishingen
dcterms.bibliographicCitation.originalpublisherplaceLondonen
dcterms.bibliographicCitation.pageend2223en
dcterms.bibliographicCitation.pagestart2208en
dcterms.bibliographicCitation.volume16en
tub.accessrights.dnbfreeen
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 Berlinen
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