Department of Physics, College of Education, University of Salahaddin, Erbil, Kurdistan Region, Iraq; Advanced Optical Material Research Group, Department of Physics, Faculty of Science, University of Technology Malaysia, Skudai, Johor, Malaysia.
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Feb 15;209:78-84. doi: 10.1016/j.saa.2018.10.032. Epub 2018 Oct 17.
Enhanced red and orange fluorescence emissions of Sm 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 Sm 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 P, I, F, F, F, F, F, H, F and emission transitions H, H, H and H under 409 nm excitation of the Sm 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 Sm-doped sodium‑zinc tellurite embedded with Ag and Au NPs are potential materials for the laser illumination.
在掺银和掺金纳米颗粒（NPs）的钠锌碲酸盐玻璃中观察到 Sm 稀土（RE）离子的增强的红色和橙色荧光发射。通过使用透射电子显微镜（TEM）证实 NPs 在玻璃基质中的精细分布，Ag 和 Au NPs 的平均直径分别为11.09nm 和3.86nm。Ag 和 Au NPs 的嵌入到玻璃结构中导致 Sm 离子的跃迁发射强度增加，这归因于局域表面等离子体共振（LSPR）的存在，这从特征吸收峰中可以看出。已经使用标准的 Judd-Ofelt 理论讨论了发光和吸收光谱，对于 Sm 离子在 409nm 激发下的某些吸收跃迁 P、I、F、F、F、F、F、H、F 和发射跃迁 H、H、H 和 H。衰减寿命曲线表现出所研究的玻璃样品的非指数行为，并且将结果与类似的报道的玻璃进行了比较。高效的红色和橙色荧光发射表明，掺银和掺金纳米颗粒的 Sm 掺杂钠锌碲酸盐是激光照明的潜在材料。
