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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.)

Phosphate glasses via coacervation route containing CdFe2O4 nanoparticles: structural, optical and magnetic characterization

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Orives, Juliane R. [1] ; Viali, Wesley R. [1] ; Santagneli, Silvia H. [1] ; Afonso, Conrado R. M. [2] ; Carvalho, Maria H. [3] ; de Oliveira, Adilson J. A. [3] ; Nalin, Marcelo [1]
Total Authors: 7
[1] Sao Paulo State Univ UNESP, Inst Chem, POB 355, BR-14800060 Araraquara, SP - Brazil
[2] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, BR-13565905 Sao Carlos, SP - Brazil
[3] Fed Univ Sao Carlos UFSCar, Dept Phys, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: DALTON TRANSACTIONS; v. 47, n. 16, p. 5771-5779, APR 28 2018.
Web of Science Citations: 1

CdFe2O4 nanoparticles of around 3.9 nm were synthesized using the coprecipitation method and protected by a silica layer. The nanoparticles were mixed with a coacervate and transformed into phosphate glasses with 1, 4 and 8% in mass of nanoparticles by the melt-quenching method. TEM images confirm that the nanoparticles were successfully incorporated into the matrix without inducing crystallization. P-31 NMR and Raman spectral analyses show that new P-O-Si bonds are formed in the glasses containing nanoparticles. The glass transition increases as a function of the nanoparticle content due to an increase in the connectivity of the phosphate glass chains. The UV-Vis spectra show bands at 415 and 520 nm assigned to Fe3+ ions and at 1025 nm, characteristic of Fe2+ ions, indicating that some of the nanoparticles dissolve during the melting process. The sample with 8% CdFe2O4 presents a paramagnetic behavior. The glasses obtained are transparent, non-hygroscopic and possess enormous thermal stability which is important for the production of optical devices. (AU)

FAPESP's process: 09/54082-2 - Acquisition of a vibranting sample magnetometer coupled with a superconducting quantum interference device assensor (Squid-VSM) with cryogenic closed cycle
Grantee:Ernesto Chaves Pereira de Souza
Support type: Multi-user Equipment Program
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC