Magnetic properties of iron oxide nanoparticles with a DMSA-modified surface

Abstract The magnetic properties of magnetite nanoparticles (Fe 3 O 4 NPs) strongly depend on their chemical and physical parameters, which can be regulated by a controlled synthesis process. To improve the quality obtained nanoparticles, surface is often modified with organic compounds (from group surfactants, sugars, proteins, or acid). In this study, we synthesized compound DMSA. Then, nanocrystallites were characterized in terms structure morphology. investigate role DMSA to understand adsorption mechanism, FTIR measurements carried out. Using Mössbauer spectroscopy, investigated temperature-induced changes prepared samples. spectra recorded wide temperature range K 390 K) for two types samples: powders ferrofluids various concentrations. case powder samples, superparamagnetic doublet appeared at room temperature. For suspensions, more complicated. They consisted superposition asymmetrically broadened sextets doublets, was caused occurrence long-range dipole-dipole interactions. These interactions affected material increased blocking Additionally, hysteresis zero field cooling-field cooling (ZFC/FC) curves measured use vibrating sample magnetometer.