1. Degradation of magnetite nanoparticles in biomimetic media
- Author
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Gema González, Luis Lascano, Juan Sojo, Ana C. Hernández, and Sarah Briceño
- Subjects
Materials science ,Coprecipitation ,Scanning electron microscope ,Simulated body fluid ,Analytical chemistry ,Nanoparticle ,Bioengineering ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Dynamic light scattering ,Chemical engineering ,Transmission electron microscopy ,Modeling and Simulation ,Magnetic nanoparticles ,General Materials Science ,0210 nano-technology ,Magnetite - Abstract
Magnetic nanoparticles (NPs) of magnetite Fe3O4 obtained by coprecipitation (COP), thermal decomposition (DT), and commercial sample (CM) have been degraded in similar conditions to physiological medium at pH 4.7 and in simulated body fluid (SBF) at pH 7.4. The formation of the nanoparticles was confirmed by FTIR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In view of medical and environmental applications, the stability of the particles was measured with dynamic light scattering. The degradation processes were followed with atomic absorption spectroscopy (EAA) and TEM. Magnetic measurements were carried out using vibrating sample magnetometry (VSM). Our results revealed that the structural and magnetic properties of the remaining nanoparticles after the degradation process were significantly different to those of the initial suspension. The degradation kinetics is affected by the pH, the coating, and the average particle size of the nanoparticles.
- Published
- 2017
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