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Magnetic behaviour of non‐interacting colloidal iron oxide nanoparticles in physiological solutions
Author(s) -
Haracz S.,
Mróz B.,
Rybka J. D.,
Giersig M.
Publication year - 2015
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201500091
Subject(s) - magnetic nanoparticles , nanoparticle , transmission electron microscopy , iron oxide nanoparticles , colloid , materials science , chemical engineering , hydrophilization , dynamic light scattering , iron oxide , polyacrylic acid , nanotechnology , dispersity , chemistry , polymer , polymer chemistry , composite material , engineering , metallurgy
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).