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金纳米核-壳结构(Au@SiO2)对铕元素的发光增强机制研究
Mechanism of Au core-shell nanoparticle(Au@SiO2)enhancement of europium luminescence
【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.
【Abstract】 To enhance luminescence emitted by rare-earth organic thin films, gold nano core-shell structures(Au@SiO2) were introduced during preparation of rare-earth luminescent films. A drop-casting method was used,Au@SiO2 nanostructures with different molar concentrations were applied onto quartz slides. A mixture of Eu(dbm)3phen: PMMA: CH2Cl2 was then spin-coated onto quartz slides to fabricate thin films. Characterizations of these samples revealed that introducing Au@SiO2 significantly enhanced film luminescence intensity. Maximum excitation and luminescence enhancement factors were 279.1% and 222.9% respectively,with extended fluorescent lifetime. Incorporating Au@SiO2 into the fabrication process of rare-earth luminescent films effectively improves their luminous performance,with promising application potentials.
【Key words】 Au@SiO2 core-shell; Au@SiO2@Eu: PMMA luminescent film; luminescence enhancement; surface plasmon;
- 【文献出处】 北京师范大学学报(自然科学版) ,Journal of Beijing Normal University(Natural Science) , 编辑部邮箱 ,2023年06期
- 【分类号】TB383.1
- 【下载频次】5