Synergistic interactions of binary suspensions of magnetic anisotropic particles

We report the effect of the dipole-dipole interaction and shape anisotropy in suspensions of permanently magnetized anisotropic particles. We quantify the dipolar interaction energy using an ellipsoid-dipole model to describe particles with similar or dissimilar shapes. The expression captures the p...

Full description

Saved in:
Bibliographic Details
Published in:Soft matter 2023-01, Vol.19 (4), p.64-651
Main Authors: Thelen, Thomas, Jara, Adriana, Torres-Díaz, Isaac
Format: Article
Language:English
Subjects:
Anisotropy
Binary mixtures
Dipole interactions
Ellipsoids
Synergistic effect
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the effect of the dipole-dipole interaction and shape anisotropy in suspensions of permanently magnetized anisotropic particles. We quantify the dipolar interaction energy using an ellipsoid-dipole model to describe particles with similar or dissimilar shapes. The expression captures the physics of the point-dipole interaction energy between uniformly magnetized spherical particles. Additionally, we report Monte Carlo simulations to describe the effect of dipolar interaction and shape anisotropy under different field strengths. Results show that the shape anisotropy and dipolar interactions modify the head-to-tail interaction with respect to spheres, promoting dendritic and barbed-wire structures in uniform ellipsoids and binary mixtures, respectively. Furthermore, competing entropic and energy interactions generate a synergistic effect reducing the magnetic response of binary suspensions. We simulate suspensions of particles with shape anisotropy using the ellipsoid-dipole model. We report the effect of shape anisotropy and dipolar interaction on the structures and the macroscopic properties of binary mixtures.
ISSN:1744-683X
1744-6848
DOI:10.1039/d2sm01234k