Structural studies of tellurite glasses from the 70TeO2-5XO-10P2O5–10ZnO–5PbF2 system (X = Ba, W, Sr, Cd) doped with erbium ions
| Autor: | Katarzyna Filipecka, Edmund Golis, El Sayed Yousef, Katarzyna Pach-Zawada, Jacek Filipecki, Dominik Dorosz, Magdalena Leśniak, P. Pawlik, Maciej Sitarz |
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| Rok vydání: | 2021 |
| Předmět: |
010405 organic chemistry
Organic Chemistry Doping Analytical chemistry Physics::Optics chemistry.chemical_element 010402 general chemistry 01 natural sciences Spectral line 0104 chemical sciences Analytical Chemistry Amorphous solid Positron annihilation spectroscopy Inorganic Chemistry Erbium symbols.namesake Positron chemistry symbols Tellurium Raman spectroscopy Spectroscopy |
| Zdroj: | Journal of Molecular Structure. 1224:128787 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2020.128787 |
| Popis: | The subject of the study was to determine the effect of erbium ions (Er3 +) on the structure of tellurite glasses. For this purpose, the positron annihilation lifetime and Raman spectroscopy were used. Changes in positron lifetime parameters and the corresponding intensities have been linked to the geometry and the number of free spaces, the pores of which vary from several angstroms to several dozen nanometers under the influence of erbium (Er3+) doped. Experimental spectra of positron lifetime have two constituent lifetimes of positrons − τ1 and τ2. The interpretation of lifetime components was based on the two-state trappingmodel. The application of Raman spectroscopy allowed to assess that the introduction of erbium ions into the tested phosphate tellurite glasses leads to depolymerization of the tellurium subnet. |
| Databáze: | OpenAIRE |
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