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Main Title: Anomalous transport of magnetic colloids in a liquid crystal–magnetic colloid mixture
Author(s): Shrivastav, Gaurav P.
Klapp, Sabine H. L.
Type: Article
Language Code: en
Abstract: We report an extensive molecular dynamics study on the translational dynamics of a hybrid system composed of dipolar soft spheres (DSS), representing ferromagnetic particles, suspended in a liquid crystal (LC) matrix. We observe that the LC matrix strongly modifies the dynamics of the DSS. In the isotropic regime, the DSS show a crossover from subdiffusive to normal diffusive behavior at long times, with an increase of the subdiffusive regime as the dipolar coupling strength is increased. In the nematic regime, the LC matrix, due to the collective reorientation of LC particles, imposes a cylindrical confinement on the DSS chains. This leads to a diffusive dynamics of DSS along the nematic director and a subdiffusive dynamics (with an exponent of ∼0.5) in the perpendicular direction. The confinement provided by the LC matrix is also reflected by the oscillatory behavior of the components of the velocity autocorrelation function of the DSS in the nematic phase.
Issue Date: 3-Jan-2019
Date Available: 30-Apr-2019
DDC Class: 530 Physik
Sponsor/Funder: DFG, 220228408, SPP 1681: Feldgesteuerte Partikel-Matrix-Wechselwirkungen: Erzeugung, skalenübergreifende Modellierung und Anwendung magnetischer Hybridmaterialien
TU Berlin, Open-Access-Mittel - 2019
Journal Title: Soft Matter
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 15
Issue: 5
Publisher DOI: 10.1039/C8SM02090F
Page Start: 973
Page End: 982
EISSN: 1744-6848
ISSN: 1744-683X
Appears in Collections:FG Computersimulationen und Theorie komplexer Fluide » Publications

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