Temperature-dependent dynamic correlations in suspensions of magnetic nanoparticles in a broad range of concentrations: a combined experimental and theoretical study

Autor(en)

Alexey O. Ivanov, Sofia Kantorovich, Vladimir S. Zverev, Ekaterina A. Elfimova, Alexander V. Lebedev, Alexander F. Pshenichnikov

Abstrakt

The interweave of competing individual relaxations influenced by the presence of temperature and concentration dependent correlations is an intrinsic feature of superparamagnetic nanoparticle suspensions. This unique combination gives rise to multiple applications of such suspensions in medicine, nanotechnology and microfluidics. Here, using theory and experiment, we investigate dynamic magnetic susceptibility in a broad range of temperatures and frequencies. Our approach allows, for the first time to our knowledge, to separate clearly the effects of superparamagnetic particle polydispersity and interparticle magnetic interactions on the dynamic spectra of these systems. In this way, we not only provide a theoretical model that can predict well the dynamic response of magnetic nanoparticles systems, but also deepen the understanding of the dynamic nanoparticle self-assembly, opening new perspectives in tuning and controlling the magnetic behaviour of such systems in AC fields.

Organisation(en)

Computergestützte Physik und Physik der Weichen Materie

Externe Organisation(en)

Ural Federal University, Russian Academy of Sciences

Journal

Physical Chemistry Chemical Physics

Band

18

Seiten

18342-18352

Anzahl der Seiten

11

ISSN

1463-9076

DOI

https://doi.org/10.1039/C6CP02793H

Publikationsdatum

07-2016

Peer-reviewed

Ja

ÖFOS 2012

103006 Chemische Physik, 103029 Statistische Physik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie, Physical and Theoretical Chemistry

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/fbbf9284-3830-4111-b710-680260fedea3