| SiO_2/Ag核壳结构纳米粒子的制备及其表面荧光增强 |
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| 引用本文： | 杨兴旺,雷新宪.SiO_2/Ag核壳结构纳米粒子的制备及其表面荧光增强[J].光谱实验室,2010,27(3):1164-1167. |
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| 作者姓名： | 杨兴旺 雷新宪 |
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| 作者单位： | 暨南大学物理系,广州市黄埔大道西601号,510632 |
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| 摘 要： | 以罗丹明B掺杂的SiO2球为核,通过化学还原的方法制备了二氧化硅/银核壳结构复合纳米粒子。采用透射电镜(TEM)、紫外-可见-近红外(UV-Vis-NIR)分光光度计和荧光分光光度计对二氧化硅/银核壳结构纳米粒子的表面形貌、表面等离子共振和表面荧光增强特性进行了研究和表征。结果表明,二氧化硅/银核壳结构纳米粒子的表面等离子共振峰具有明显的可调谐性,且其表面荧光增强强烈依赖于银壳层的表面等离子共振,随银壳层厚度的增大而增强。
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| 关 键 词： | 罗丹明B 二氧化硅/银核壳结构纳米粒子 表面等离子共振 表面荧光增强 |
Synthesis and Surface Fluorescent Enhancement of SiO2/Ag Core-Shell Nanoparticles |
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| YANG Xing-Wang,LEI Xin-Xian.Synthesis and Surface Fluorescent Enhancement of SiO2/Ag Core-Shell Nanoparticles[J].Chinese Journal of Spectroscopy Laboratory,2010,27(3):1164-1167. |
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| Authors: | YANG Xing-Wang LEI Xin-Xian |
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| Institution: | YANG Xing-Wang LEI Xin-Xian(Department of Physics,Jinan University,Guangzhou 510632,P.R.China) |
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| Abstract: | SiO2/Ag core-shell composite nanoparticles were prepared by the chemical reduction method with rhodamine B doped SiO2 nanospheres as the core.The surface morphologies,surface plasmonic resonance and surface fluorescent enhancement of SiO2/Ag core-shell nanoparticles were characterized by scanning electron microscopy （SEM）,UV-Vis-NIR spectroscopy and fluorescence spectroscopy.The results showed that the surface fluorescent enhancement of SiO2/Ag core-shell nanoparticles was strongly dependent on the surface plasmonic resonance,and it became stronger with the increase of silver shell. |
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| Keywords: | Rhodamine B SiO2/Ag Core-Shell Nanoparticles Surface Plasmonic Resonance Surface Fluorescent Enhancement |
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