Temperature-dependent dynamic correlations in suspensions of magnetic nanoparticles in a broad range of concentrations: a combined experimental and theoretical study / Ivanov Alexey O.,Kantorovich Sofia S.,Zverev Vladimir S.,Elfimova Ekaterina A.,Lebedev Alexander V.,Pshenichnikov Alexander F. // PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - 2016. - V. 18, l. 27. - P. 18342-18352.

ISSN/EISSN:

1463-9076 / 1463-9084

Type:

Article

Abstract:

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.

Author keywords:

IRON-OXIDE NANOPARTICLES; DIRECTIONAL ATTRACTIVE FORCES; COBALT FERRITE NANOPARTICLES; MEAN-FIELD THEORY; ROTATIONAL DIFFUSION; DIPOLAR INTERACTIONS; HYPERTHERMIA; FERROCOLLOIDS; PARTICLES; SUSCEPTIBILITY

DOI:

10.1039/c6cp02793h

Web of Science ID:

ISI:000379486200063

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL 21
Publisher	ROYAL SOC CHEMISTRY
Address	THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Language	English
EISSN	1463-9084
Keywords-Plus	IRON-OXIDE NANOPARTICLES; DIRECTIONAL ATTRACTIVE FORCES; COBALT FERRITE NANOPARTICLES; MEAN-FIELD THEORY; ROTATIONAL DIFFUSION; DIPOLAR INTERACTIONS; HYPERTHERMIA; FERROCOLLOIDS; PARTICLES; SUSCEPTIBILITY
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Atomic, Molecular \& Chemical
Author-Email	sofia.kantorovich@univie.ac.at
ResearcherID-Numbers	Kantorovich, Sofia/H-4586-2011 Ivanov, Alexey/E-4442-2011 Elfimova, Ekaterina/P-5003-2016 Zverev, Vladimir/M-7382-2013 Pshenichnikov, Alexander/F-9511-2013
ORCID-Numbers	Kantorovich, Sofia/0000-0001-5700-7009 Ivanov, Alexey/0000-0001-8239-4039 Zverev, Vladimir/0000-0003-0422-1436 Elfimova, Ekaterian/0000-0002-8941-8184
Funding-Acknowledgement	Russian Science Foundation {[}15-12-10003]; FVVF START-Project {[}Y 627-N27]; EU {[}642774]
Funding-Text	The research was supported by Russian Science Foundation Grant (No. 15-12-10003). S. S. K. is grateful to the FVVF START-Project Y 627-N27 and EU-Project 642774 ETN-Colldense. We also thank Michaela McCaffrey for language corrections.
Number-of-Cited-References	118
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	23
Journal-ISO	Phys. Chem. Chem. Phys.
Doc-Delivery-Number	DQ8UH