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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Structural investigation and photoluminescent properties of ZnWO4:Dy3+ nanocrystals

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Author(s):
Goncalves, R. F. [1] ; Longo, E. [2] ; Marques, A. P. A. [1] ; Silva, M. D. P. [2] ; Cavalcante, L. S. [3] ; Nogueira, I. C. [4] ; Pinatti, I. M. [2] ; Pereira, P. F. S. [2] ; Godinho, M. J. [5, 6]
Total Authors: 9
Affiliation:
[1] UNIFESP Univ Fed Sao Paulo, Rua Prof Artur Riedel, 275, BR-09972270 Diadema, SP - Brazil
[2] Univ Fed Sao Carlos, CDMF DQ, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Estadual Piaui, PPGQ, Rua Joao Cabral, 2231, POB 381, BR-64002150 Teresina, PI - Brazil
[4] IFMA Inst Fed Maranhao, Ave Getulio Vargas, BR-65030005 Sao Luis, MA - Brazil
[5] Univ Fed Sao Carlos, DEMa, BR-13565905 Sao Carlos, SP - Brazil
[6] UFG, Dept Quim CAC, BR-75704020 Catalao, Go - Brazil
Total Affiliations: 6
Document type: Journal article
Source: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 28, n. 20, p. 15466-15479, OCT 2017.
Web of Science Citations: 6
Abstract

In this study, ZnWO4: Dy3+ nanocrystals containing 0.5, 1, and 2 mol% of Dy3+ were synthesized by a coprecipitation method and grown in a microwave- assisted hydrothermal system at 140 degrees C for 1 h. X-ray diffraction, Rietveld refinement, and Fourier transform Raman and infrared spectroscopy analyses indicated that each of the crystals had a wolframite- type monoclinic structure, with no other phases present. Structural refinement was carried out to model the distorted octahedral {[}ZnO6], {[}DyO6], and {[}WO6] clusters. Furthermore, transmission scanning electron microscopy images revealed interesting crystal morphologies and a decrease of the average crystal size, which were dependent on the Dy3+ doping concentration. Ultraviolet-Visible diffuse reflectance spectra indicated that the optical band gap increases with increasing replacement of Zn2+ by Dy3+ ions. The photoluminescent properties, chromaticity coordinates, and lifetimes of the ZnWO4: Dy3+ nanocrystals were studied. (AU)

FAPESP's process: 13/23995-8 - Synthesis of silver tungstate doped with Eu3+ and the study of their optical, photoluminescent and photocatalytic properties
Grantee:Ivo Mateus Pinatti
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 13/07437-5 - Production and characterization of nanostructures ceramic materials pure and hybrids
Grantee:Ana Paula de Azevedo Marques
Support type: Regular Research Grants