| Full text | |
| Author(s): |
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
|
| Affiliation: | [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: | 2 |
| Abstract | |
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: | 13/07793-6 - CeRTEV - Center for Research, Technology and Education in Vitreous Materials |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 09/54082-2 - Emu: projeto para aquisicao de um magnetometro de amostra vibrante que utiliza como sensor um dispositivo supercondutor de interferencia quantica acoplado (squid-vsm) com circuito fechado de criogenia |
| Grantee: | Ernesto Chaves Pereira de Souza |
| Support Opportunities: | Multi-user Equipment Program |