Issue 1, 2021

Frequency-dependent magnetic susceptibility of magnetic nanoparticles in a polymer solution: a simulation study

Abstract

Magnetic composite materials i.e. elastomers, polymer gels, or polymer solutions with embedded magnetic nanoparticles are useful for many technical and bio-medical applications. However, the microscopic details of the coupling mechanisms between the magnetic properties of the particles and the mechanical properties of the (visco)elastic polymer matrix remain unresolved. Here we study the response of a single-domain spherical magnetic nanoparticle that is suspended in a polymer solution to alternating magnetic fields. As interactions we consider only excluded volume interactions with the polymers and hydrodynamic interactions mediated through the solvent. The AC susceptibility spectra are calculated using a linear response Green–Kubo approach, and the influences of changing polymer concentration and polymer length are investigated. Our data is compared to recent measurements of the AC susceptibility for a typical magnetic composite system [Roeben et al., Colloid Polym. Sci., 2014, 2013–2023], and demonstrates the importance of hydrodynamic coupling in such systems.

Graphical abstract: Frequency-dependent magnetic susceptibility of magnetic nanoparticles in a polymer solution: a simulation study

Article information

Article type
Paper
Submitted
28 Aug 2020
Accepted
28 Oct 2020
First published
28 Oct 2020

Soft Matter, 2021,17, 174-183

Frequency-dependent magnetic susceptibility of magnetic nanoparticles in a polymer solution: a simulation study

P. Kreissl, C. Holm and R. Weeber, Soft Matter, 2021, 17, 174 DOI: 10.1039/D0SM01554G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements