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Synthesis and luminescent properties of multifunctional Ag@Fe3O4@Gd2O3Eu3+ composite

Chamé F, Karely ; Ojeda M, Miguel ; González G, Federico ; Meza E, Octavio ; Ojeda M, Ma. Luisa ; Velásquez O, Celso

Journal of alloys and compounds, 2017-05, Vol.704, p.212-217 [Periódico revisado por pares]

Lausanne: Elsevier B.V

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Título:
Synthesis and luminescent properties of multifunctional Ag@Fe3O4@Gd2O3Eu3+ composite
Autor: Chamé F, Karely ; Ojeda M, Miguel ; González G, Federico ; Meza E, Octavio ; Ojeda M, Ma. Luisa ; Velásquez O, Celso
Assuntos: Ag@Fe3O4@Gd2O3:Eu3 ; Chemical composition ; Chemical synthesis ; Composite materials ; Composition effects ; Core–shell composite ; Energy transfer ; Europium ; Iron oxides ; Luminescence ; Magnetic properties ; Magnetic-luminescent materials ; Multifunctional composites ; Nanoparticles ; Optical properties ; Quenching ; Silver
É parte de: Journal of alloys and compounds, 2017-05, Vol.704, p.212-217
Descrição: In this work, the synthesis of Ag@Fe3O4@Gd2O3:Eu3+ composites based on the addition of Gd2O3 with different concentrations of Eu3+ to Ag@Fe3O4 core-shell composites was performed with the aim of attaining multifunctional composites endowed with a combination of properties such as magnetic (Fe3O4) and luminescent (Gd2O3:Eu3+) together with the addition of the antimicrobial effect of AgNPs. The morphology and chemical composition of the synthesized composites were investigated by techniques such as SEM, FT-IR, Raman, XRD and luminescence, the results showed that the composites present a change from the Ag@Fe3O4 spherical shape to rice-like morphology with the cover of Gd2O3:Eu3+. We have also found that the deposition of AgNPs on the composites produces an increment in the Raman signal. However, we observed a decrement in the luminescent intensity due to a quenching effect which could be attributed to an energy transfer from Eu3+ ions to AgNPs. Finally, a comparison of the average lifetime of the nanostructures with different amounts of Eu3+ has been performed, thus finding an increment of the average lifetime after decreasing the Eu3+ composition. [Display omitted] •A new Ag@Fe3O4@Gd2O3:Eu3+ multifunctional composite were synthetized.•Composite has higher Raman intensity than Fe3O4@Gd2O3:Eu3+.•Fluorescent composite has an acceptable lifetime decay.
Editor: Lausanne: Elsevier B.V
Idioma: Inglês

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Synthesis and luminescent properties of multifunctional Ag@Fe3O4@Gd2O3Eu3+ composite

Chamé F, Karely ; Ojeda M, Miguel ; González G, Federico ; Meza E, Octavio ; Ojeda M, Ma. Luisa ; Velásquez O, Celso

Lausanne: Elsevier B.V

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