Luminescent and magnetic composites: study of iron oxide induced luminescence quenching of Eu3+ ion
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2016
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BRAZILIAN MEETING ON INORGANIC CHEMISTRY, 18th
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Resumo
The bifunctional nanomaterials, co-assembling photonic and magnetic features into single
entity nanostructures are remarkable for applications, such as biosensors for medical
diagnosis and ionizing radiation scintillation. The preparation of these nanomaterials are
accessible through facile methods, using iron oxide as core nanoparticles and RE3+ materials
as luminescent center. The magnetic properties are usually due to the core Fe3O4
nanoparticles, however, the magnetic moments of the RE3+ ions are also contributed to the
whole magnetization of these nanostructures. In addition, rare earth ions exhibit well-defined
narrow emission bands in different spectral ranges from visible to near-infrared due to their 4f
intraconfiguration transitions, giving the bifunctional nanomaterials efficient luminescent
behavior. In the present work, the preparation strategy and characterizations of the
bifunctional Fe3O4@Y2O3:Eu3+ Fe3O4@SiO2@Y2O3:Eu3+, Fe3O4@SiO2@Ag@Y2O3:Eu3+
and -Fe2O3@Y2O3:Eu3+ materials are discussed. The DC magnetic properties (MH and
ZFC/FC curves) and photoluminescence behavior of the RE3+ composites based on the
emission spectral data and luminescence decay curves are studied. The experimental intensity
parameters (λ), lifetimes (), emission quantum efficiencies () as well as radiative (Arad)
and non-radiative (Anrad) decay rates are calculated, in addition, based on these parameters
iron oxide induced luminescence quenching of Eu3+ ion is studied.
Como referenciar
KHAN, LATIF U.; ZAMBON, LUIS F.M.; BRITO, HERMI F.; FELINTO, MARIA C.F.C. Luminescent and magnetic composites: study of iron oxide induced luminescence quenching of Eu3+ ion. In: BRAZILIAN MEETING ON INORGANIC CHEMISTRY, 18th, September 25-30, 2016, São Pedro, SP. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/27396. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.