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Influence of gold nanoparticles on the up-conversion fluorescence in Sm3+

机译:金纳米粒子对Sm3 +中上转换荧光的影响

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Fluorescence spectra of gold colloid containing samarium ions have been recorded and analyzed at room temperature. For gold colloids, two fluorescence emission peaks are observed at 443 nm and 745 rim. respectively when the corresponding excitation wavelength is fixed at 595 nm. When amount Of Sm-3' are added to gold colloids, the up-conversion emission peak at 443 nin increased greatly. Furthermore, increasing the gold colloids addition leads to the Up-conversion luminescent intensity increases in the early stage and then decreased. We believe the enhanced up-conversion are due to the energy transferred from the fluorescence from gold nanoparticles to Sm-3', and make the excited state absorption (ESA) in Sm-3' takes place. (c) 2005 Elsevier B.V. All rights reserved.
机译:含有sa离子的金胶体的荧光光谱已被记录并在室温下进行了分析。对于金胶体,在443 nm和745边缘观察到两个荧光发射峰。分别将相应的激发波长固定在595 nm时。当向金胶体中添加一定量的Sm-3'时,在443 nin处的上转换发射峰大大增加。此外,增加金胶体的添加会导致上转换发光强度在早期增加,然后降低。我们认为增强的上转换是由于能量从金纳米颗粒的荧光转移到Sm-3',并使Sm-3'中发生了激发态吸收(ESA)。 (c)2005 Elsevier B.V.保留所有权利。

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