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COMPARISON AMONG THE PHYSICAL PROPERTIES OF VARIOUS SUSPENSIONS OF MAGNETITE NANOPARTICLES STABILIZED IN WATER USING DIFFERENT ORGANIC SHELLS

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Mihaela RACUCIU , Dorina CREANGA, Claudia NADEJDE

Editorial: U.P.B. Sci. Bull., Series A,, 75 (3), p.209-214, 2013.

Rezumat:

The stability of magnetic nanoparticle suspensions, designed for biomedical
purposes can be ensured by coating magnetic cores with various organic shells. In
this work, the magnetite powder was successfully dispersed in water by using steric
stabilization and electrostatic interactions – with volume fraction ranging between
2.42 and 3.14 %. The mean physical diameter of colloidal nanoparticles was of 9.2 ÷ 11.98 nm with non-magnetic shell of 2.7 ÷ 3.42 nm ensuring good magnetic properties, i.e. mass density of saturation magnetization of 24 ÷ 58 A⋅m2/kg. Sodium oleate, tetramethylammonium hydroxide and rifampicin were found to ensure better microstructural and magnetic properties compared to citric acid.

Cuvinte cheie: magnetic core; non-magnetic shell; biocompatible suspension

URL: http://www.scientificbulletin.upb.ro/rev_docs_arhiva/rezd30_334969.pdf