Magnetic behaviour of non-interacting colloidal iron oxide nanoparticles in physiological solutions

Magnetic properties of colloidal nanoparticles (NPs) depend on various parameters, such as size, size distribution, interparticle distance, shape, condition of synthesis and stabilizing surfactants. Nowadays, those magnetic nanoparticles (MNPs) are preferably produced in hydrophobic organic solvents...

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Bibliographic Details
Published in:Crystal research and technology (1979) 2015-09, Vol.50 (9-10), p.791-796
Main Authors: Haracz, S., Mróz, B., Rybka, J. D., Giersig, M.
Format: Article
Language:English
Subjects:
Agglomeration
Bio-Application
Colloids
Destabilization
Iron Oxide Nanoparticles
Iron oxides
Magnetic properties
Nanoparticles
Solvents
SQUID
Superparamagnetism
Surfactants
Synthesis
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Summary:Magnetic properties of colloidal nanoparticles (NPs) depend on various parameters, such as size, size distribution, interparticle distance, shape, condition of synthesis and stabilizing surfactants. Nowadays, those magnetic nanoparticles (MNPs) are preferably produced in hydrophobic organic solvents, while biomedical applications need hydrophilic properties. Thus, a major challenge is the hydrophilization of the particles, while avoiding destabilization and aggregation. Here we present magnetic characteristics of non‐interacting, highly crystalline iron oxide NPs in physiological solutions that are coated with modified polyacrylic acid. The magnetic analysis comprised both static and dynamic magnetic behaviour of 4 nm NPs. The NPs have been further characterized by transmission electron microscopy (TEM) and energy dispersive X‐ray spectroscopy (EDX). Magnetic properties of colloidal nanoparticles depend on various parameters, such as size, size distribution, interparticle distance, shape, condition of synthesis and stabilizing surfactants. Nowadays, those magnetic nanoparticles are preferably produced in hydrophobic organic solvents, while biomedical applications need hydrophilic properties. Thus, a major challenge is the hydrophilization of the particles, while avoiding destabilization and aggregation. Here we present magnetic characteristics of non‐interacting, highly crystalline iron oxide NPs in physiological solutions that are coated with modified polyacrylic acid.
ISSN:0232-1300
1521-4079
DOI:10.1002/crat.201500091