Emission of Eu3+ in SiO2-ZnO glass and SiO2-SnO2 glass-ceramic: Correlation between structure and optical properties of Eu3+ ions
| Autor: | T.M. Dung Cao, T.T. Van Tran, Van Hieu Le, Quang Vinh Lam |
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| Rok vydání: | 2017 |
| Předmět: |
Glass-ceramic
Materials science Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Amorphous solid symbols.namesake Nanocrystal Chemical engineering law Transmission electron microscopy Materials Chemistry Ceramics and Composites symbols Electric dipole transition 0210 nano-technology Raman spectroscopy Magnetic dipole |
| Zdroj: | Journal of Non-Crystalline Solids. 459:57-62 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2016.12.040 |
| Popis: | SiO2:Eu3 + based free-crack transparent bulk composites containing two types of semiconductor nanoparticles (SnO2 or ZnO) were synthesized by sol-gel process. The results of vibrational spectra (Raman, FT-IR), X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) indicate that the SiO2-SnO2 matrix possess the structure of a glass-ceramic due to the presence of SnO2 nanocrystals with average size of 7 ± 2 nm homogeneously distributed in silica matrix whereas the SiO2-ZnO still remain amorphous structure after a heat treatment at 600 °C for 1 h. The energy transfer from nanoparticles to Eu3 + ions is observed in both composites, but this process is more efficient in the glass-ceramic systems. Moreover, the competition between magnetic dipole and electric dipole transitions of Eu3 + as well as the shape of emission bands depends strongly on the structure of host matrix. |
| Databáze: | OpenAIRE |
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