Synthesis and characterization of magnetite nanoparticles coated with lauric acid

Understanding the process of synthesis of magnetic nanoparticles is important for its implementation in in vitro and in vivo studies. In this work we report the synthesis of magnetic nanoparticles made from ferrous oxide through coprecipitation chemical process. The nanostructured material was coate...

Full description

Saved in:
Bibliographic Details
Published in:Materials characterization 2013-07, Vol.81, p.28-36
Main Authors: Mamani, J.B., Costa-Filho, A.J., Cornejo, D.R., Vieira, E.D., Gamarra, L.F.
Format: Article
Language:English
Subjects:
Biomedical materials
CALORIMETRY
Characterization
Coating
Cross-disciplinary physics: materials science
rheology
DODECANOIC ACID
Exact sciences and technology
FERRITES
FERROMAGNETIC RESONANCE
Iron oxide
IRON OXIDES
Lauric acid
MAGNETITE
MATERIALS SCIENCE
Nanoparticles
NANOSTRUCTURES
PARTICLES
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solidification
SPHERICAL CONFIGURATION
SQUID DEVICES
SURFACTANTS
SYNTHESIS
Thermal properties
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Understanding the process of synthesis of magnetic nanoparticles is important for its implementation in in vitro and in vivo studies. In this work we report the synthesis of magnetic nanoparticles made from ferrous oxide through coprecipitation chemical process. The nanostructured material was coated with lauric acid and dispersed in aqueous medium containing surfactant that yielded a stable colloidal suspension. The characterization of magnetic nanoparticles with distinct physico-chemical configurations is fundamental for biomedical applications. Therefore magnetic nanoparticles were characterized in terms of their morphology by means of TEM and DLS, which showed a polydispersed set of spherical nanoparticles (average diameter of ca. 9nm) as a result of the protocol. The structural properties were characterized by using X-ray diffraction (XRD). XRD pattern showed the presence of peaks corresponding to the spinel phase of magnetite (Fe3O4). The relaxivities r2 and r2* values were determined from the transverse relaxation times T2 and T2* at 3T. Magnetic characterization was performed using SQUID and FMR, which evidenced the superparamagnetic properties of the nanoparticles. Thermal characterization using DSC showed exothermic events associated with the oxidation of magnetite to maghemite. •Synthesis of magnetic nanoparticles coated with lauric acid•Characterization of magnetic nanoparticles•Morphological, structural, magnetic, calorimetric and relaxometric characterization
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2013.04.001