DC pole | Wartość | Język |
dc.contributor.author | Pawlik, Natalia | - |
dc.contributor.author | Szpikowska-Sroka, Barbara | - |
dc.contributor.author | Pisarska, Joanna | - |
dc.contributor.author | Goryczka, Tomasz | - |
dc.contributor.author | Pisarski, Wojciech A. | - |
dc.date.accessioned | 2019-11-14T18:58:22Z | - |
dc.date.available | 2019-11-14T18:58:22Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Materials, Vol. 12 (2019), Art. No. 3735 | pl_PL |
dc.identifier.issn | 1996-1944 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/11623 | - |
dc.description.abstract | Nanocrystalline transparent BaF2:Eu3+ glass-ceramic materials emitting reddish-orange
light were fabricated using a low-temperature sol-gel method. Several experimental techniques were
used to verify structural transformation from precursor xerogels to sol-gel glass-ceramic materials
containing fluoride nanocrystals. Thermal degradation of xerogels was analyzed by thermogravimetric
analysis (TG) and di erential scanning calorimetry method (DSC). The presence of BaF2 nanocrystals
dispersed in sol-gel materials was confirmed by the X-ray di raction (XRD) analysis and transmission
electron microscopy (TEM). In order to detect structural changes in silica network during annealing
process, the infrared spectroscopy (IR-ATR) was carried out. In particular, luminescence spectra
of Eu3+ and their decays were examined in detail. Some spectroscopic parameters of Eu3+ ions in
glass-ceramics containing BaF2 nanocrystals were determined and compared to the values obtained
for precursor xerogels. It was observed, that the intensities of two main red and orange emission bands
corresponding to the 5D0!7F2 electric-dipole transition (ED) and the 5D0!7F1 magnetic-dipole (MD)
transition are changed significantly during transformation from xerogels to nanocrystalline BaF2:Eu3+
glass-ceramic materials. The luminescence decay analysis clearly indicates that the measured lifetime
5D0 (Eu3+) considerably enhanced in nanocrystalline BaF2:Eu3+ glass-ceramic materials compared
to precursor xerogels. The evident changes in luminescence spectra and their decays suggest the
successful migration of Eu3+ ions from amorphous silica network to low-phonon BaF2 nanocrystals. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | BaF2 nanocrystals | pl_PL |
dc.subject | glass-ceramics | pl_PL |
dc.subject | Eu3+ luminescence | pl_PL |
dc.subject | sol-gel synthesis | pl_PL |
dc.title | Reddish-Orange Luminescence from BaF2:Eu3+ Fluoride Nanocrystals Dispersed in Sol-Gel Materials | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.3390/ma12223735 | - |
Pojawia się w kolekcji: | Artykuły (WNŚiT)
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