Luminescence enhancement mechanism of Au coreshell nanoparticles (Au@SiO2)on Europium
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摘要: 为了增强稀土有机薄膜的发光效果，在制备稀土发光薄膜过程中引入了金纳米核-壳结构（Au@SiO2）．利用滴铸法将不同物质的量浓度的Au@SiO2滴在石英片上；利用旋涂法将Eu(dbm)3phen：聚甲基丙烯酸甲酯(PMMA)： CH2Cl2混合溶液旋涂在石英片上，制备成薄膜样品．通过对薄膜样品的性能表征后发现：引入Au@SiO2后可增强薄膜的发光强度；激发和发光增强因子最大分别为279.1%和222.9%，同时延长了薄膜样品的荧光寿命．将Au@SiO2引入稀土发光薄膜的制备过程中，能够有效地提升薄膜的发光性能，应用潜力较好．
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关键词:
- 金纳米核-壳结构(Au@SiO2) /
- Au@SiO2@Eu:PMMA发光薄膜 /
- 发光增强 /
- 表面等离子体
Abstract: To enhance the luminescence effect of rare-earth organic thin films, gold nano core-shell structures (Au@SiO2) were introduced during the preparation process of rare-earth luminescent films. Using the drop-casting method, Au@SiO2 nanostructures with different molar concentrations were applied onto quartz slides; subsequently, a mixture of Eu(dbm)3phen: PMMA:CH2Cl2 was spin-coated onto the quartz slides to fabricate thin film samples. Post-characterization of these samples revealed that introducing Au@SiO2 significantly enhanced the luminescence intensity of the films. The maximum excitation and luminescence enhancement factors were 279.1% and 222.9% respectively, and the fluorescent lifetime of the film samples was extended as well. Incorporating Au@SiO2 into the fabrication process of rare-earth luminescent films effectively improves their luminous performance, showing promising application potential. -
图 1 滴铸Au@SiO2水溶液样品的石英片的SEM图像
注：加速工作电压为10 kV；实际样品尺寸为5.0 mm；放大倍数为50 000倍；次级电子（上探头接收二次电子信号）．
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