Issue 35, 2021

Dual magnetic field and temperature optical probes of controlled crystalline phases in lanthanide-doped multi-shell nanoparticles

Abstract

The engineering of core@multi-shell nanoparticles containing heterogeneous crystalline phases in different layers constitutes an important strategy for obtaining optical probes. The possibility of obtaining an opto-magnetic core@multi-shell nanoparticle capable of emitting in the visible and near-infrared ranges by upconversion and downshifting processes is highly desirable, especially when its optical responses are dependent on temperature and magnetic field variations. This work proposes the synthesis of hierarchically structured core@multi-shell nanoparticles of heterogeneous crystalline phases: a cubic core containing DyIII ions responsible for magnetic properties and optically active hexagonal shells, where ErIII, YbIII, and NdIII ions were distributed. This system shows at least three excitation energies located at different biological windows, and its emission intensities are sensitive to temperature and external magnetic field variations. The selected crystalline phases of the core@multi-shell nanoparticles obtained in this work is fundamental to the development of multifunctional materials with potential applications as temperature and magnetic field optical probes.

Graphical abstract: Dual magnetic field and temperature optical probes of controlled crystalline phases in lanthanide-doped multi-shell nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
11 6 2021
Accepted
24 7 2021
First published
30 7 2021

Nanoscale, 2021,13, 14723-14733

Dual magnetic field and temperature optical probes of controlled crystalline phases in lanthanide-doped multi-shell nanoparticles

F. D. S. Ferreira, A. J. de Morais, C. M. Santos Calado, F. Iikawa, O. D. D. Couto Junior, G. Brunet, M. Murugesu, I. O. Mazali and F. A. Sigoli, Nanoscale, 2021, 13, 14723 DOI: 10.1039/D1NR03796J

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