Core-shell magneto-luminescent nanocomposites

A. A. Matiushkina; M. A. Baranov; A. U. Dubavik; A. O. Orlova

doi:10.1117/12.2556887

1 April 2020 Core-shell magneto-luminescent nanocomposites

A. A. Matiushkina, M. A. Baranov, A. U. Dubavik, A. O. Orlova

Proceedings Volume 11345, Nanophotonics VIII; 1134512 (2020) https://doi.org/10.1117/12.2556887
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

Magneto-luminescent materials that do not exist in nature, can find a wide application in biomedical and environmental fields. Here we describe magneto-optical properties of core-shell-shell nanocomposites consisting of a Fe₃O₄ superparamagnetic iron oxide nanoparticle (SPION) covered with quantum-sized brightly luminescent CdSe layer surrounded by ZnS passivating shell. The synthesized nanocomposites demonstrate excitonic bands in their absorption and photoluminescent (PL) spectra centered at 585 nm and 603 nm, respectively. The PL quantum yield of nanocomposites has been increased by 5 times due to their passivation with ZnS shell. The analysis of magneto-optical properties of the synthesized Fe₃O₄/CdSe/ZnS nanocomposites has shown that their magnetic circular dichroism (MCD) spectrum is characterized with the bands centered at 430 nm, 350 nm and 303 nm corresponding to ⁶A₁ → ⁴E, ⁴A₁(⁴G); ⁶A₁ → ⁴E(⁴D) and ⁶A₁ → ⁴T₁(⁴P) electronic transitions, respectively. It has been found that the synthesized core-shell SPIONs demonstrate excellent colloidal stability, magneto-optical properties typical for SPIONs and bright photoluminescence

Conference Presentation

Citation Download Citation

A. A. Matiushkina, M. A. Baranov, A. U. Dubavik, and A. O. Orlova "Core-shell magneto-luminescent nanocomposites", Proc. SPIE 11345, Nanophotonics VIII, 1134512 (1 April 2020); https://doi.org/10.1117/12.2556887

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