Magnetic and Mössbauer Behavior of Iron Oxide Nanoparticles Stabilized with Polyethylene Glycol

Nowadays, the study of routes for synthesis of nanoparticles (NP) of iron oxide for technological applications has intensified. In this work, it was used as a method of obtaining NP iron oxide by the coprecipitation, with characteristics such as simplicity and ease of large scale production. This study aimed at controlling characteristics of nanoparticles of iron oxide from the insertion of the lining polyethylene glycol (PEG). After a reaction of iron salts in basic medium, the NP were coated with PEG to control the stability and degree of agglomeration. Measurements were made by X-ray diffraction to characterize iron oxide NP, Raman spectroscopy to assess the presence of magnetite, FTIR spectroscopy to assess the presence of PEG, by scanning electron microscopy and transmission electron microscopy to characterize the morphological gradient magnetometry. Alternating gradient force magnetometry and Mossbauer spectroscopy to magnetic characterizations. The results showed that as the use amount of PEG insertion and temperature during the acquisition phase occurs a large variation of characteristics of the nanoparticles obtained.