Modulating the magnetic-optical properties of Zn1−xCoxO nanocrystals with x-content

In this study, magnetic-optical properties of Zn 1− x Co x O NCs were modulated with x -content. The optical, structural, morphological, and magnetic properties were investigated by optical absorption (OA), fluorescence (FL), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy...

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Bibliographic Details
Published in:Journal of materials research 2021-04, Vol.36 (8), p.1657-1665
Main Authors: Batista, Elisson A., Silva, Anielle C. A., de L. Rezende, Thaís K., Guimarães, Eder V., Pereira, Pedro A. G., de Souza, Paulo E. N., da Silva, Ricardo S., de Morais, Paulo C., Dantas, Noelio O.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Chemistry and Materials Science
Cobalt
Inorganic Chemistry
Magnetic properties
Materials Engineering
Materials research
Materials Science
Nanocomposites
Nanocrystals
Nanorods
Nanotechnology
Optical properties
Paramagnetic resonance
Raman spectroscopy
Scanning electron microscopy
Spectrum analysis
Spintronics
X-ray diffraction
Zinc oxide
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Summary:In this study, magnetic-optical properties of Zn 1− x Co x O NCs were modulated with x -content. The optical, structural, morphological, and magnetic properties were investigated by optical absorption (OA), fluorescence (FL), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and electronic paramagnetic resonance (EPR). The XRD and Raman results confirm the growth of Zn 1− x Co x O NCs, with x greater than 1.0 having occurred for the formation of the nanocomposite (Co-doped ZnO/ZnCo 2 O 4 ). The formation of the nanocomposite allows new and exciting optical and magnetic properties. SEM images show inhibition in ZnO nanorod growth with Co-content and formation of ZnCo 2 O 4 NCs. OA and FL spectra have changed with x -content in Zn 1− x Co x O NCs. These changes are strongly related to the symmetric environment of the Co 2+ ions within ZnO NCs and the formation of ZnCo 2 O 4 NCs. A linear dependence of FL intensity was observed with the x-content in the red-green region. The symmetric environment and the nanocomposite formation also alter the magnetic properties confirmed by EPR. Therefore, Zn 1− x Co x O NCs can be a material platform suitable for photonic devices, magnetic-optical devices, or spintronics. Graphic abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-021-00162-0