Oscillatory active microrheology of active suspensions

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dc.contributor.authorKnežević, Miloš
dc.contributor.authorAvilés Podgurski, Luisa E.
dc.contributor.authorStark, Holger
dc.date.accessioned2021-12-13T07:34:08Z
dc.date.available2021-12-13T07:34:08Z
dc.date.issued2021-11-22
dc.description.abstractUsing the method of Brownian dynamics, we investigate the dynamic properties of a 2d suspension of active disks at high Péclet numbers using active microrheology. In our simulations the tracer particle is driven either by a constant or an oscillatory external force. In the first case, we find that the mobility of the tracer initially appreciably decreases with the external force and then becomes approximately constant for larger forces. For an oscillatory driving force we find that the dynamic mobility shows a quite complex behavior—it displays a highly nonlinear behavior on both the amplitude and frequency of the driving force. In the range of forces studied, we do not observe a linear regime. This result is important because it reveals that a phenomenological description of tracer motion in active media in terms of a simple linear stochastic equation even with a memory-mobility kernel is not appropriate, in the general case.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2021en
dc.identifier.eissn2045-2322
dc.identifier.pmid34811417
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/14036
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-12809
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc621 Angewandte Physikde
dc.subject.othercolloidsen
dc.subject.otherrheologyen
dc.subject.otherstatistical physicsen
dc.subject.othermicrorheologyen
dc.titleOscillatory active microrheology of active suspensionsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber22706en
dcterms.bibliographicCitation.doi10.1038/s41598-021-02103-7en
dcterms.bibliographicCitation.issue1en
dcterms.bibliographicCitation.journaltitleScientific Reportsen
dcterms.bibliographicCitation.originalpublishernameSpringer Natureen
dcterms.bibliographicCitation.originalpublisherplaceLondonen
dcterms.bibliographicCitation.volume11en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Theoretische Physik::FG Statistische Physik weicher Materie und biologischer Systemede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaften
tub.affiliation.groupFG Statistische Physik weicher Materie und biologischer Systeme
tub.affiliation.instituteInst. Theoretische Physik
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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