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Content archived on 2022-12-23

Novel strategies for intermatrix synthesis of highly stable ferromagnetic nanoparticles

Objective

The project theme lies within the field of magnetic nanocomposites, consisting of ferromagnetic / superparamagnetic nanoparticles embedded in stabilizing matrices. Such nanoparticles exhibit unique size-related magnetic properties, which are of interest with respect to basic science and from the practical viewpoint. The main goal of the project is development of novel strategies for intermatrix synthesis of ferromagnetic / superparamagnetic nanoparticles, immobilized in polymer, polymer-inorganic or carbon matrices, and study of their structures and magnetic properties. The nanoparticles will comprise ferromagnetic elements such as iron, cobalt and nickel, their oxides and carbides and alloys (Fe-Pt, Fe-Co, Co-CoO-Co, Co-Pd-Co, Co-TiO2-Co, Co-Pd, Fe-Pd, SmCo-Co and Nd-Fe-B-Fe3B). To achieve the goal, several novel processing techniques will be employed and studied. Some of these techniques have been developed by the authors. The methods to be investigated comprise: (i) Conjugated processes of thermal polymerization and co-polymerization of metal-containing monomers in the solid phase, followed by controlled thermolysis of the products obtained. In this method, the ferromagnetic nanoparticles and stabilizing polymeric matrix are formed simultaneously in a single stage; (ii) Fabrication of homogeneous nanoparticles and "core-shell" structures by thermal decomposition of metal-containing compounds in liquid (mineral oil or solutions of polymer in oil); (iii) Polymer sol-gel synthesis which includes the formation of the polymer-inorganic matrix (TiO2 etc.) and in situ formation of magnetic nanofillers during the matrix condensation stage; (iv) Condensation from the metal and carbon vapours formed in an electric arc, followed by deposition of metal-graphite composites; (v) Synthesis of complex ferritic oxides from oxo-polynuclearic metal carboxylates (including lanthanide atoms) as the model complexes in the formation of metal nanoparticles. Complementary methods for magnetic characterization will be used, including vibrating sample magnetometry, electron magnetic resonance (EMR) and gamma-resonance (G-MR) spectroscopy. The EMR and G-MR techniques will be applied in studying surface and interfacial effects. Since multilayer NP could have very complex structures, it is important to use high-resolution methods for characterization of the morphology and structure. It is planned to utilize high-resolution transmission electron microscopy (HRTEM) and the wide-angle x-ray scattering (WAXS) technique. Standard TEM, X-ray diffraction, and the EXAFS methods will also be used. Such a complex approach will facilitate a comprehensive comparison of the processing methods and selection of the most promising and appropriate procedure(s) for particular prospective applications. The consortium consisting of eight laboratories, representing six countries has been assembled with this particular aim. There are three NIS and three INTAS partners. The members have recor

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Keywords

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Programme(s)

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Call for proposal

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Funding Scheme

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Coordinator

WARSAW UNIVERSITY OF TECHNOLOGY
EU contribution
No data
Address
WOLOSKA, 141
WARSAW
Poland

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Total cost

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Participants (6)

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