A comparative enhancement of Au and Ag NPs role on radiative properties in Sm3+ doped zinc-sodium tellurite glass: Judd-Ofelt parameter
| Autor: | Saman Q. Mawlud |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Absorption spectroscopy
Chemistry Analytical chemistry Sodium tellurite Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Atomic and Molecular Physics and Optics 0104 chemical sciences Analytical Chemistry Ion chemistry.chemical_compound Colloidal gold Surface plasmon resonance 0210 nano-technology Luminescence Instrumentation Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 209:78-84 |
| ISSN: | 1386-1425 |
| Popis: | Enhanced red and orange fluorescence emissions of Sm3+ Rare earth (RE) ions were observed in sodium‑zinc tellurite glasses embedded with silver and gold nanoparticles (NPs). The fine distribution of NPs in the glass matrix with an average diameter ~ 11.09 nm and ~3.86 nm for Ag and Au NPs respectively were confirmed by using transmission electron microscope (TEM). The embedding of Ag and Au NPs into the glass structure caused an increasing in the transition emission intensity of Sm3+ ions, which is ascribed to the progress of the presence of the localized surface Plasmon resonance (LSPR) indicating from the characteristic absorption peaks. The luminescence and absorption spectra have been discussed using a standard hypothesis Judd-Ofelt theory for a certain absorption transitions 6P3/2, 4I11/2, 6F11/2, 6F9/2, 6F7/2, 6F5/2, 6F3/2, 6H15/2, 6F1/2 and emission transitions 6H5/2, H7/2, 6H9/2 and H11/2 under 409 nm excitation of the Sm3+ ions. The decay life time curve exhibited a non-exponential behavior of the studied glass samples and the results were compared with the similar reported glasses. An efficient red and orange fluorescence emission illustrate that the Sm3+-doped sodium‑zinc tellurite embedded with Ag and Au NPs are potential materials for the laser illumination. |
| Databáze: | OpenAIRE |
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