Relating the length of a magnetic filament with solvophobic, superparamagnetic colloids to its properties in applied magnetic fields

Autor(en)

Deniz Mostarac, Ekaterina V. Novak, Sofia S. Kantorovich

Abstrakt

The idea of creating polymer-like structures by crosslinking magnetic nanoparticles (MNPs) opened an alternative perspective on controlling the rheological properties of magnetoresponsive systems, because unlike suspensions of self-assembled MNPs, whose cluster sizes are sensitive to temperature, magnetic filaments (MFs) preserve their initial topology. Considering the length scales characteristic of single-domain nanoparticles used to create MFs, the MNPs can be both ferro- and superparamagnetic. Moreover, steric or electrostatic stabilization might not fully screen van der Waals interactions. In this paper, using coarse-grained molecular dynamics simulations, we investigate the influence of susceptibility of superparamagnetic MNPs - their number and central attraction forces between them - on the polymeric, structural, and magnetic properties of MFs with varied backbone rigidity. We find that, due to the general tendency of MFs with superparamagnetic monomers to bend, reinforced for colloids with a high susceptibility, properties of MFs vary greatly with chain length.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie, Forschungsplattform MMM Mathematics-Magnetism-Materials

Externe Organisation(en)

Ural Federal University

Journal

Physical Review E

Band

108

Anzahl der Seiten

12

ISSN

2470-0045

DOI

https://doi.org/10.1103/PhysRevE.108.054601

Publikationsdatum

11-2023

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie

ASJC Scopus Sachgebiete

Statistical and Nonlinear Physics, Statistics and Probability, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/fa75506d-d089-46bd-b9d1-14a781a53317