Dye-labeled silver nanoshell-bright particle
Dye-labeled silver nanoshell-bright particle
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DOI：
10.1021/jp057032z
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发表时间：
2006-05-11
影响因子：
3.3
通讯作者：
Lakowicz, JR
中科院分区：
文献类型：
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作者：
Zhang, J;Gryczynski, I;Lakowicz, JR
制备了平均粒径为40-600 nm的二氧化硅微球，并将Ru（bpy）（3）（2+）配合物引入到微球中。这些珠被逐层涂覆银以产生多孔但连续的金属纳米壳。这些金属壳的厚度为5-50 nm。随着银壳层厚度的增加，染料的发射带变窄，发射强度增强，这是由于核中Ru（bpy）（3）（2+）的发射光与银壳层的金属等离子体激元耦合的结果。发光强度的增强也依赖于二氧化硅核的尺寸，显示增强效率随着二氧化硅珠的尺寸的增加而降低。寿命测量支持染料和金属外壳之间的耦合机制。该研究可用于开发具有明亮和窄发射带的新型染料标记的金属颗粒。
Silica beads with average diameters of 40-600 nm were prepared, and Ru(bpy)(3)(2+) complexes were incorporated into the beads. These beads were coated by silver layer by layer to generate porous but continuous metal nanoshells. The thicknesses of these metal shells were 5-50 nm. The emission band from the dyes in the silica cores was more narrow and the intensity was enhanced with growth of silver shell thickness due to coupling of the emission light from Ru(bpy)(3)(2+) in the cores with the metal plasmon from the silver shells. The enhancement of emission intensity was also dependent on the size of the silica core, showing that the enhancement efficiency decreased with an increase in the size of the silica beads. Lifetime measurements support the coupling mechanism between the dye and metal shell. This study can be used to develop novel dye-labeled metal particles with bright and narrow emission bands.