Abstract
Magnetic nanoparticles coated with chitosan or quaternized chitosan were synthesized by a new route and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), temperature dependent and in-field Mossbauer spectroscopy, FTIR, thermal analysis (TG/DTA), zeta potential, and magnetic measurements. The prepared ferrofluids were stable for a relatively long time. Mossbauer spectra recorded in an external magnetic field of 5 T establish the formation of “nonstoichiometric magnetite” exhibiting the perfect ferrimagnetic ordering with a low degree of spin canting and frustration. Magnetic measurements confirm the desired properties of the magnetic chitosan for biomedical applications including the superparamagnetic character at room temperature and a high saturation magnetization achievable at low applied fields. The successful and full capping of particles is indicated mainly from magnetic and DTA data through the suppressed interparticle interactions and a significant shift in the trans...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
