Surface-enhanced fluorescence from fluorophore-assembled monolayers by using Ag@SiO2 nanoparticles.
Surface-enhanced fluorescence from fluorophore-assembled monolayers by using Ag@SiO2 nanoparticles.
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DOI：
10.1002/cphc.201000849
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
Ruohu Zhang;Zhuyuan Wang;Chunyuan Song;Jing Yang;Jin Li;Asma Sadaf;Yiping Cui
中科院分区：
文献类型：
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作者：
Ruohu Zhang;Zhuyuan Wang;Chunyuan Song;Jing Yang;Jin Li;Asma Sadaf;Yiping Cui
基于Ag@SiO（2）纳米颗粒，提出了一种新的、简单的增强固体基质表面分析物荧光的方法。制备了两种壳层厚度分别为3和15 nm的银-二氧化硅核壳纳米粒子，并分别用作增强剂。通过简单地将增强剂滴移到具有玫瑰红单层的基底表面上，与对照样品相比，通过使用具有约3 nm的壳的Ag@SiO（2）纳米颗粒实现了约27倍的增强，而当使用具有较厚壳的那些时，获得了约11.7倍的增强。实验研究了增强剂的壳层厚度和表面密度对增强效果的影响。结果表明，该方法可以潜在地有助于基于荧光的表面分析。
A new and simple procedure to enhance the fluorescence of analytes on the surfaces of a solid substrate is demonstrated based on Ag@SiO(2) nanoparticles. Two kinds of silver-silica core-shell nanoparticles with shell thicknesses of around 3 and 15 nm have been prepared and used as enhancing agents, respectively. By simply pipetting drops of the enhancing agents onto substrate surfaces with Rose Bengal monolayers, an enhancement of about 27 times, compared with the control sample, is achieved by using the Ag@SiO(2) nanoparticles with shells of about 3 nm, whereas an enhancement of around 11.7 times is obtained when using those with thicker shells. The effects of shell thickness and surface density of the enhancing agents on the enhancement have been investigated experimentally. The results show that this method can be potentially helpful in fluorescence-based surface analysis.