Study of magnetic iron oxide nanoparticles coated with silicon oxide by ferromagnetic method
نویسندگان
چکیده
Magnetic nanoparticles of magnetite with a size ~8 nm synthesized different type coating were studied by ferromagnetic resonance in the temperature range from 7 to 300 K. The features experimental dependences parameters curve (the magnitude resonant field, line width and intensity) their approximation allowed us estimate values characteristic temperatures. Firstly, value Vervey dependence its on determined. Secondly, transition superparamagnetic state (blocking temperature) within which magnetic structure outer shell nanoparticle is spin glass are established Keywords: iron oxide nanoparticles, resonance, superparamagnetism, blocking temperature.
منابع مشابه
Magnetic properties of polypyrrole - coated iron oxide nanoparticles
Iron oxide nanoparticles were prepared by sol gel process. In-situ polymerization of pyrrole monomer in the presence of oxygen in iron oxide ethanol suspension resulted in a iron-oxide polypyrrole nanocomposite. The structure and magnetic properties of the nanocomposites with varying pyrrole concentrations are investigated. The X-Ray diffraction studies indicate the presence of γ − Fe2O3 phase ...
متن کاملMagnetic hyperthermia and MRI relaxometry with dendrimer coated iron oxide nanoparticles
Introduction: Recently, some studies have focused on dendrimer nanopolymers as an MRI contrast agent or a vehicle for gene and drug delivery. Considering the suitable properties of these materials, they are appropriate candidates for coating iron oxide nanoparticles which are applied to magnetic hyperthermia. To the best of our knowledge, the novelty of this study is the inves...
متن کاملPolymer-coated Iron Oxide Magnetic Nanoparticles – Preparation and Characterization
This contribution presents the production of polymer-coated iron oxide magnetic nanoparticles carrying functional groups on their surface and their basic characterization. The preparation of polymer-coated nanoparticles was carried out by a two-step process. In the first step, magnetite (Fe3O4) nanoparticles were prepared by a co-precipitation method from the solutions of FeCl2.4H2O and FeCl3.6...
متن کاملSynthesis and Cytotoxicity Assessment of Gold-coated Magnetic Iron Oxide Nanoparticles
Introduction: One class of magnetic nanoparticles is magnetic iron oxide nanoparticles (MIONs) which has been widely offered due to of their many advantages. Owing to the extensive application of MIONs in biomedicine, before they can be used in vivo, their cytotoxicity have to be investigated. Therefore, there is an urgent need for understanding the potential risks associated with MIONs.Materia...
متن کاملBiocompatibility of chitosan-coated iron oxide nanoparticles with osteoblast cells
BACKGROUND Bone disorders (including osteoporosis, loosening of a prosthesis, and bone infections) are of great concern to the medical community and are difficult to cure. Therapies are available to treat such diseases, but all have drawbacks and are not specifically targeted to the site of disease. Chitosan is widely used in the biomedical community, including for orthopedic applications. The ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Fizika tverdogo tela
سال: 2023
ISSN: ['0367-3294', '1726-7498']
DOI: https://doi.org/10.21883/pss.2023.06.56095.01h