Outstanding features of Cu-doped ZnS nanoclusters

ZnS and their Cu-doped nanoclusters (NCs) were synthesized successfully using the wet chemical route with different Cu content. The crystalline structure was investigated using x-ray powder diffraction which assured the single-phase formation in cubic symmetry. High-resolution transmission electron...

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Bibliographic Details
Published in:Nanotechnology 2018-05, Vol.29 (21), p.215709-215709
Main Authors: Tawfik, Wael Z, Farghali, A A, Moneim, Ahmed, Imam, N G, El-Dek, S I
Format: Article
Language:English
Subjects:
Cu:ZnS
dielectric
magnetic
nanoclusters
photoluminescence
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Summary:ZnS and their Cu-doped nanoclusters (NCs) were synthesized successfully using the wet chemical route with different Cu content. The crystalline structure was investigated using x-ray powder diffraction which assured the single-phase formation in cubic symmetry. High-resolution transmission electron microscope indicated the microstructure of NCs with a size ranging from 2-4 nm. A butterfly hysteresis (M-H) loop was observed at room temperature with large values of coercivity for the Cu content of x = 0.05. Photoluminescence emission spectra were recorded from 500-615 nm for pure and Cu-doped ZnS NCs at a 350 nm excitation wavelength. The sample exhibited green fluorescence bands peaking at 535, 544, 552.5, 558.2, and 560.6 nm, which confirmed the characteristic feature of Zn2+ as luminescent centers in the lattice. The additional yellow and orange emissions are due to defect levels or/and impurity centers. The dielectric constant as well as the conductivity values increased with increasing Cu content.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/aab4d1