Enhanced luminescence from lanthanide complex by silver nanoparticles
Enhanced luminescence from lanthanide complex by silver nanoparticles
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DOI：
10.1016/j.matlet.2008.04.005
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发表时间：
2008-07
影响因子：
3
通讯作者：
Yue-hui Wang;Xin Zhou;Ting Wang;Ji Zhou
中科院分区：
文献类型：
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作者：
Yue-hui Wang;Xin Zhou;Ting Wang;Ji Zhou
研究了铕配合物Eu（III）DPA（DPA为吡啶二甲酸）在直径为5 nm的Ag纳米粒子存在下的光致发光。当Ag纳米粒子浓度低于3.0×1013/ml时，Eu（III）的荧光强度明显增强。5D 0 → 7 F2和5D 0 → 7 F1跃迁的发射强度对Ag纳米粒子浓度的依赖性不同，电偶极跃迁的增强作用强于磁偶极跃迁。在增强发光中，荧光寿命没有显著变化。这种增强归因于辐射跃迁和表面等离子体共振之间的强耦合。
Photoluminescence of europium complex, Eu(III)DPA, where DPA is dipicolinic acid, in the presence of 5 nm-diameter Ag nanoparticles, was studied. Pronounced enhancement of Eu(III) luminescence was observed in the complex solution containing Ag nanoparticle with a concentration below 3.0×1013/ml. The dependencies of emission intensity of5D0→7F2and5D0→7F1transition on the concentration of Ag nanoparticles are quite different, the enhancement of electric dipole transition is stronger than that of magnetic dipole transition. There is no significant change in fluorescence lifetime in enhanced luminescence. The enhancement was attributed to a strong coupling between the radiation transition and surface plasmon resonance.