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Silva AS, Lourenço SA, Dantas NO. Mn concentration-dependent tuning of Mn(2+) d emission of Zn1-xMnxTe nanocrystals grown in a glass system. Phys Chem Chem Phys. 2016;18(8):6069-76doi: 10.1039/c5cp06802a.
Silva, A. S., Lourenço, S. A., & Dantas, N. O. (2016). Mn concentration-dependent tuning of Mn(2+) d emission of Zn1-xMnxTe nanocrystals grown in a glass system. Physical chemistry chemical physics : PCCP, 18(8), 6069-76. https://doi.org/10.1039/c5cp06802a
Silva, Alessandra S, et al. "Mn concentration-dependent tuning of Mn(2+) d emission of Zn1-xMnxTe nanocrystals grown in a glass system." Physical chemistry chemical physics : PCCP vol. 18,8 (2016): 6069-76. doi: https://doi.org/10.1039/c5cp06802a
Silva AS, Lourenço SA, Dantas NO. Mn concentration-dependent tuning of Mn(2+) d emission of Zn1-xMnxTe nanocrystals grown in a glass system. Phys Chem Chem Phys. 2016 Feb 17;18(8):6069-76. doi: 10.1039/c5cp06802a. PMID: 26844704.
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Phys Chem Chem Phys. 2016 Feb 17;18(8):6069-76. doi: 10.1039/c5cp06802a.

Mn concentration-dependent tuning of Mn(2+) d emission of Zn1-xMnxTe nanocrystals grown in a glass system.

Physical chemistry chemical physics : PCCP

Alessandra S Silva, Sidney A Lourenço, Noelio O Dantas

Affiliations

  1. Universidade Federal de Uberlândia, Instituto de Física, Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Uberlândia, CEP 38400-902, Brazil. [email protected].
  2. Universidade Tecnológica Federal do Paraná, Engenharia de Materiais, CEP 86036-370, Londrina, Paraná, Brazil.

PMID: 26844704 DOI: 10.1039/c5cp06802a

Abstract

We studied the effect of Mn concentration on the optical, morphological and magnetic properties of Zn1-xMnxTe NCs grown in a glass matrix produced by the fusion method. The physical properties of these materials were determined by optical absorption (OA), transmission electron microscopy (TEM), atomic/magnetic force microscopy (AFM/MFM) and photoluminescence (PL). An analysis of the OA spectra, based on the crystal field theory (CFT), showed strong evidence that Mn(2+) ions were substitutionally incorporated into the Zn1-xMnxTe NCs until reaching the solubility limit (concentration, x = 0.100). Above this nominal concentration, TEM showed the onset of Mn-related phases, such as MnO and α-MnO2, in the PZABP glass system. AFM images showed that NC density on the surface of the glass matrix decreased as x-content increased. It is probable that MnO and MnO2 NCs would outnumber Zn1-xMnxTe NCs at higher concentrations - a conclusion that was corroborated by the OA spectra and TEM images. MFM images revealed that samples with Mn(2+) ions responded to magnetization from an MFM probe. This implied that Mn(2+) ions were incorporated within the Zn1-xMnxTe NCs and gave rise to the diluted magnetic semiconductor (DMS) structure. The PL spectra not only confirmed the evidence obtained by OA, CFT, TEM and AFM/MFM, but also showed that Mn(2+) concentration could be used to tune (4)T1((4)G) → (6)A1((6)S) emission energy.

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