Biocompatible Magnetite Nanoparticles Trapped at the Air/Water Interface

Biocompatible magnetite nanoparticles trapped at the air/water interface.

In the last decade, iron oxide nanoparticles (NPs)—known as super-paramagnetic iron oxide nanoparticles (SPION)—have received significant attention due to their applicability in a variety of domains. In the biomedical field, iron oxide nanoparticles are very promising as drug-delivery systems, magneticresonance-imaging contrast enhancers (clinical diagnosis), inflammation-responsive or anti-can...

The apparent charge of nanoparticles trapped at a water interface.

Charged spherical nanoparticles trapped at the interface between water and air or water and oil exhibit repulsive electrostatic forces that contain a long-ranged dipolar and a short-ranged exponentially decaying component. The former are induced by the unscreened electrostatic field through the non-polar low-permittivity medium, and the latter result from the overlap of the diffuse ion clouds t...

Biocompatible hydrodispersible magnetite nanoparticles used as antibiotic drug carriers.

Here we report a newly synthesized vectorizing nanosystem, based on hydrodispersible magnetite nanoparticles (HMNPs) with an average size less than 10 nm, obtained by precipitation of Fe(II) and Fe(III) in basic solution of p-aminobenzoic acid (PABA), characterized by high-resolution transmission electron microscopy (HR-TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), differential...

Oxidation of Magnetite Nanoparticles

Magnetite pollution nanoparticles in the human brain.

Biologically formed nanoparticles of the strongly magnetic mineral, magnetite, were first detected in the human brain over 20 y ago [Kirschvink JL, Kobayashi-Kirschvink A, Woodford BJ (1992) Proc Natl Acad Sci USA 89(16):7683-7687]. Magnetite can have potentially large impacts on the brain due to its unique combination of redox activity, surface charge, and strongly magnetic behavior. We used m...