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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Enhanced fluorescence from Eu~(3+) owing to surface plasma oscillation of silver particles in glass
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Enhanced fluorescence from Eu~(3+) owing to surface plasma oscillation of silver particles in glass

机译：由于玻璃中银粒子的表面等离子体振荡，增强了Eu〜（3+）的荧光

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摘要

We describe the increase of europium ion (Eu~(3+)) fluorescence owing to resonant plasma oscillation of silver (Ag) particles in silica (SiO_2) glass, which were precipitated by annealing in a reducing atmosphere sol-gel derived SiO_2 glass containing Ag~+ and Eu~(3+) ions. Nanometer size effects of Ag particles on the increase were also investigated as a function of the reduction time. The mean particle size and the volume fraction of silver particles in glass were estimated from absorption spectra using the Mie-Durde theory modified by the electron mean free path model. The fluorescence from Eu~(3+) ions when the excitation was a N_2 laser increased in the presence of silver particles of approx 4.3 nm size. From comparison of the radiative damping time of the plasma oscillation with the lifetime of Eu~(3+) fluorescence we, tentatively, concluded that the induced surface plasma oscillation by incidence and the interaction between Eu~(3+) and Ag particles occurred simultaneously.
机译：我们描述了silica离子（Eu〜（3+））荧光的增加，这归因于二氧化硅（SiO_2）玻璃中银（Ag）粒子的共振等离子体振荡，这些粒子在还原气氛中通过溶胶-凝胶衍生的SiO_2玻璃通过退火而沉淀出来。 Ag〜+和Eu〜（3+）离子。还研究了Ag颗粒对增加的纳米尺寸影响，其为还原时间的函数。使用由电子平均自由程模型修正的Mie-Durde理论，通过吸收光谱估算玻璃中银颗粒的平均粒径和体积分数。当存在约4.3 nm大小的银粒子时，当激发是N_2激光时，来自Eu〜（3+）离子的荧光增加。通过比较等离子体振荡的辐射衰减时间与Eu〜（3+）荧光的寿命，我们初步得出结论，入射光引起的表面等离子体振荡以及Eu〜（3+）与Ag粒子之间的相互作用同时发生。

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