print small

Participating Countries:

Australia

Austria

Belgium

Canada

Cyprus

Czech Republic

Denmark

European Commission

France

Germany

Greece

Hungary

Ireland

Israel

Italy

Norway

Poland

Portugal

Romania

Russian Federation

Serbia

Slovakia

Slovenia

Spain

Sweden

Switzerland

Turkey

Ukraine

United Kingdom

United States of America

COST is supported by the EU Framework Programme Horizon 2020
This website is supported by COST
6/13/2016 (Added to site)
Author(s): J. G. Ovejero, D. Cabrera, J. Carrey, T. Valdivielso, G. Salas and F. J. Teran

Effects of inter- and intra-aggregate magnetic dipolar interactions on the magnetic heating efficiency of iron oxide nanoparticles

Journal: Physical Chemistry Chemical Physics
DOI: 10.1039/c6cp00468g
Request reprint

Iron oxide nanoparticles have found an increasing number of biomedical applications as sensing or trapping platforms and therapeutic and/or diagnostic agents. Most of these applications are based on their magnetic properties, which may vary depending on the nanoparticle aggregation state and/or concentration. In this work, we assess the effect of the inter- and intra-aggregate magnetic dipolar interactions on the heat dissipation power and AC hysteresis loops upon increasing the nanoparticle
concentration and the hydrodynamic aggregate size. We observe different effects produced by inter- (long distance) and intra-aggregate (short distance) interactions, resulting in magnetizing and demagnetizing effects, respectively. Consequently, the heat dissipation power under alternating magnetic fields strongly reflects such different interacting phenomena. The intra-aggregate interaction results were successfully
modeled by numerical simulations. A better understanding of magnetic dipolar interactions is mandatory for achieving a reliable magnetic hyperthermia response when nanoparticles are located into biological matrices.



Founding Members

Project Office

STSM



Subscribe to newsletter