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Issue 30, 2018
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Multifunctional nanostructured Co-doped ZnO: Co spatial distribution and correlated magnetic properties

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Abstract

In this report we present a systematic structural and magnetic analysis of Co-doped ZnO nanoparticles prepared via a microwave-assisted hydrothermal route. The structural data confirm the incorporation of Co ions into the wurtzite ZnO lattice and a Co concentration mainly near/at the surface of the nanoparticles. This Co spatial distribution is set to passivate the surface of the ZnO nanoparticles, inhibiting the nanoparticle growth and suppressing the observation of a ferromagnetic phase. Based on experimental and theoretical results we propose a kinetic-thermodynamic model for the processes of nucleation and growth of the Co-doped ZnO nanoparticles, and attribute the observed ferromagnetic order to a ferromagnetism associated with specific defects and adsorbed elements at the surface of the nanoparticle. Our findings give valuable contribution to the understanding of both the doping process at the nanoscale and the nature of the magnetic properties of the Co-doped ZnO system.

Graphical abstract: Multifunctional nanostructured Co-doped ZnO: Co spatial distribution and correlated magnetic properties

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Publication details

The article was received on 05 May 2018, accepted on 08 Jul 2018 and first published on 09 Jul 2018


Article type: Paper
DOI: 10.1039/C8CP02870B
Citation: Phys. Chem. Chem. Phys., 2018,20, 20257-20269
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    Multifunctional nanostructured Co-doped ZnO: Co spatial distribution and correlated magnetic properties

    R. T. da Silva, A. Mesquita, A. O. de Zevallos, T. Chiaramonte, X. Gratens, V. A. Chitta, J. M. Morbec, G. Rahman, V. M. García-Suárez, A. C. Doriguetto, M. I. B. Bernardi and H. B. de Carvalho, Phys. Chem. Chem. Phys., 2018, 20, 20257
    DOI: 10.1039/C8CP02870B

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