SÍNTESE E CARACTERIZAÇÃO DE ESTRUTURAS DO TIPO CORE/SHELL CoFe2O4@Ag OBTIDAS PELO MÉTODO SOLVATERMAL ASSISTIDO POR MICRO-ONDAS VISANDO APLICAÇÕES BIOLÓGICAS.

• Ano de defesa: 2019
• Autor(a) principal: BORGES, Mikaelly Daiany Ferreira
• Orientador(a): SILVA, Fernando Carvalho
• Banca de defesa: SILVA, Fernando Carvalho , SINFRÔNIO, Francisco Sávio Mendes , MACIEL, Adeilton Pereira , MENEZES, Alan Silva de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Maranhão
• Programa de Pós-Graduação: PROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA/CCET
• Departamento: DEPARTAMENTO DE QUÍMICA/CCET
• País: Brasil
• Palavras-chave em Português: CoFe2O4@Ag; Funcionalização da Superfície; Método Solvatermal assistido por micro-ondas; Atividade antimicrobiana
• Palavras-chave em Inglês: CoFe2O4@Ag; Surface Functionalisation; Solvatermal Method Microwave-assisted; antimicrobial activity
• Área do conhecimento CNPq: Farmacologia Clínica
• Link de acesso: https://tedebc.ufma.br/jspui/handle/tede/2976

Functionalised magnetic nanoparticles demonstrate wide industrial applicability and technological. In this context, this work aimed at the synthesis of nanoparticles CoFe2O4 by the microwave assisted thermal decomposition method using iron (III) trisacetylacetonate and cobalt (II) trisacetylacetonate in the presence of oleylamine, oleic acid and octadecene (CoFe2O4/AO/OL). The nanoparticles were characterized by Wavelength Dispersion Fluorescence Spectroscopy Techniques (WDXRF), X-Ray Diffractometry (DRX), Infrared Spectroscopy with Fourier Transform (FTIR), Raman Spectroscopy, Electronic Microscopy of Tranmission (MET), TG-DSC and Vibrant Sample Magnetometer (VSM) Nanoparticles were identified with single phase spatial group characteristics and crystalline structure of the like spinel. Rietveld's mathematical refinement treatment estimated that the size Average ferrite crystalite is approximately 6.64 nm, with low microdeformations in the order of 0.1%. The samples had superparamagnetic characteristics and the size average estimated by the Langevim equation proved to be very close to average size provided by the MET technique. To obtain CoFe2O4@Ag, initially performed the transfer of the nanoparticles to the aqueous phase using the cationic surfactant CTAB, such as transfer was verified by UV-vis. The silver coating of the nanoparticles was evaluated using DRX, which indicated diffraction peaks for silver and silver bromide metallic. Biological tests demonstrated potential fungicide of CoFe2O4@Ag, and cytotoxic in low doses to MCF-7 tumor cells.