Superparamagnetic behaviour of zinc ferrite obtained by the microwave assisted method

Autor(es)

Hangai, B. ; Borsari, E. ; Aguiar, E. C. ; Garcia, F. G. ; Longo, E. ; Simoes, A. Z.

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 28, n. 14, p. 10772-10779, JUL 2017.
• Citações Web of Science: 2

Resumo

Magnetic ZnFe2O4 nanoparticles with magnetization saturation of 12.1 emu/g were synthesized through hydrothermal microwave method at 140 A degrees C for 32 min. These compound is being tested in magnetic hyperthermia a promising therapeutic cancer treatment, which causes lysis of tumor cells by heating magnetic nanoparticles through an external magnetic field. X-ray diffraction reveals a single-phase ZnFe2O4 nanoparticles with well-defined structure while Raman spectroscopy reveals that at 32 min of soaking time provides the energy crystallization, causing anisotropy in the structural growth at short range causing a certain degree of order in the crystal lattice. Morphology of the powders was investigated by transmission electronic microscopy (HRTEM) which showed particle sizes with 10-25 nm of diameter being an important factor for application in magneto-hyperthermia. Magnetic parameters analyzed by means of a vibrating-sample magnetometer unit showed that these nanoparticles have great potential in magneto-hyperthermia application. (AU)

• Processo FAPESP: 16/02180-4 - Encapsulamento de nanopartículas ferromagnéticas em matriz epoxídica para o tratamento de hepatocarcinoma
• Beneficiário: Bruno de Vasconcellos Averaldo Hangai
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica