Andrade, Ângela LeãoFabris, José DomingosPereira, Márcio CésarDomingues, Rosana ZacariasArdisson, José Domingos2017-05-232017-05-232013ANDRADE, A. L. et al. Preparation of composite with silica-coated nanoparticles of iron oxide spinels for applications based on magnetically induced hyperthermia. Hyperfine Interactions, v. 218, p. 71-82, 2013. Disponível em: <https://link.springer.com/article/10.1007/s10751-012-0681-9>. Acesso em: 20 abr. 2017.1572-9540http://www.repositorio.ufop.br/handle/123456789/7787It is reported a novel method to prepare magnetic core (iron oxide spinels)–shell (silica) composites containing well-dispersed magnetic nanoparticles in aqueous solution. The synthetic process consists of two steps. In a first step, iron oxide nanoparticles obtained through co-precipitation are dispersed in an aqueous solution containing tetramethylammonium hydroxide; in a second step, particles of this sample are coated with silica, through hydrolyzation of tetraethyl orthosilicate. The intrinsic atomic structure and essential properties of the core–shell system were assessed with powder X-ray diffraction, Fourier transform infrared spectrometry, Mössbauer spectroscopy and transmission electron microscopy. The heat released by this ferrofluid under an AC-generated magnetic field was evaluated by following the temperature evolution under increasingmagnetic field strengths.Results strongly indicate that this ferrofluid based on silica-coated iron oxide spinels is technologically a very promising material to be used in medical practices, in oncology.en-USabertoBiomedicineNanotechnologyMagnetic hyperthermiaFerrofluidArtigo publicado em periodicohttps://link.springer.com/article/10.1007/s10751-012-0681-9https://doi.org/10.1007/s10751-012-0681-9