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Luminescent rare earth tantalate and niobate: synthesis, properties and applications in photonics

Grant number: 17/10424-3
Support type:Scholarships in Brazil - Master
Effective date (Start): November 01, 2017
Effective date (End): August 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal researcher:Rogéria Rocha Gonçalves
Grantee:Fernanda Hediger Borges Ribeiro
Home Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated scholarship(s):18/04587-0 - Yttrium Tantalates and Niobates rare earth ions doped with emission in the visible and near infrared region for photonics applications, BE.EP.MS


The research aim of this project is the preparation of luminescent rare earth doped (RE) tantalates and niobates, using the sol-gel methodology. This synthesis methodology allows the preparation of materials using relatively low energy compared to other synthetic routes widely described in the literature, such as the solid state reaction using very high temperatures. Alkoxy precursors and Ta2O5, Nb2O5 and RE oxides will be used. Concerning on the precursors of RE elements, commercial oxides and reclycling products from the FAPESP project (2016 / 50112-8 entitled Recovery of lanthanides and other metals from WEEE), which involves an international network of researchers, will be used. It will be carried out the materials preparation focused mainly on the structural and spectroscopic study and, later, a systematic study on morphological control of the nanoparticles. In addition to the particulate systems, a luminescent tantalates or niobates coating on the magnetic nanoparticles wil be systematically studied to reach multifunctional core-shell nanoparticles. The synthesized materials may be applied in areas such as Optics, Photonics and Biophotonics, especially in the Health, Energy and Telecommunications sectors.The preparation and structural and spectroscopic characterization as a function of composition, doping and thermal annealig represent the basis of the academic study which will be developed, closely correlating the structure of matter with the luminescent properties and applications. For this purpose, a systematic optical, structural, morphological and spectroscopic (vibrational and electronic) properties will be carried out and studied, aiming at the improvement and optimization of these properties for later technological applications, especially as optical markers.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
LABAKI, H. P.; BORGES, F. H.; CAIXETA, F. J.; GONCALVES, R. R. Widely dual tunable visible and near infrared emission in Pr3+-doped yttrium tantalate: Pr3+ concentration dependence on radiative transitions from P-3(0) to the D-1(2). Journal of Luminescence, v. 236, AUG 2021. Web of Science Citations: 0.
BORGES, FERNANDA HEDIGER; CAIXETA, FABIO JOSE; PEREIRA, RAFAEL RAMIRO; DE OLIVEIRA, SILVANA RUELLA; FERREIRA, RUTE A. S.; GONCALVES, ROGERIA ROCHA. High Eu3+ concentration quenching in Y3TaO7 solid solution for orange-reddish emission in photonics. RSC ADVANCES, v. 10, n. 29, p. 16917-16927, MAY 4 2020. Web of Science Citations: 0.
BORGES, FERNANDA HEDIGER; CAIXETA, FABIO JOSE; PEREIRA, RAFAEL RAMIRO; DE OLIVEIRA, SILVANA RUELLA; GONCALVES, ROGERIA ROCHA. Yttrium tantalate containing high concentrations of Eu3+ as dopant: Synthesis and structural and luminescence features. Journal of Luminescence, v. 199, p. 143-153, JUL 2018. Web of Science Citations: 5.

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