Ag纳米粒子聚集体的SiO2包覆及其SERS效应

李晓坤; 张友林; 孔祥贵

doi:10.3788/fgxb20143507.0853

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Ag纳米粒子聚集体的SiO₂包覆及其SERS效应

发光学应用及交叉前沿 | 更新时间：2020-08-12

- Ag纳米粒子聚集体的SiO₂包覆及其SERS效应
- Aggregation of Ag Nanoparticles Coated with Silica and Its SERS Effect
- 发光学报 2014年35卷第7期页码：853-857
- 作者机构：
  
  发光学及应用国家重点实验室中国科学院长春光学精密机械与物理研究所,吉林长春,130033
- 作者简介：
- 基金信息：
  
  国家自然科学基金（11374297）资助项目()
- DOI：10.3788/fgxb20143507.0853
  中图分类号： O657
- 收稿日期：2014-03-27，
  
  修回日期：2014-04-24，
  
  网络出版日期：2014-05-09，
  
  纸质出版日期：2014-07-03
- 稿件说明：
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李晓坤, 张友林, 孔祥贵. Ag纳米粒子聚集体的SiO2包覆及其SERS效应[J]. 发光学报, 2014,35(7): 853-857

LI Xiao-kun, ZHANG You-lin, KONG Xiang-gui. Aggregation of Ag Nanoparticles Coated with Silica and Its SERS Effect[J]. Chinese Journal of Luminescence, 2014,35(7): 853-857
李晓坤, 张友林, 孔祥贵. Ag纳米粒子聚集体的SiO2包覆及其SERS效应[J]. 发光学报, 2014,35(7): 853-857 DOI： 10.3788/fgxb20143507.0853.

LI Xiao-kun, ZHANG You-lin, KONG Xiang-gui. Aggregation of Ag Nanoparticles Coated with Silica and Its SERS Effect[J]. Chinese Journal of Luminescence, 2014,35(7): 853-857 DOI： 10.3788/fgxb20143507.0853.

摘要

为实现表面增强拉曼散射（SERS）信号的快速检测分析，报道了一种简单的利用SiO

包覆对巯基苯甲酸（4MBA）修饰的Ag纳米粒子形成核壳结构纳米颗粒SERS标记物的方法。通过调控溶液中硝酸钠的浓度来控制4MBA-Ag的聚集程度，获得不同的热点效应，然后利用SiO

包覆实现对聚集体的固定。扫描电镜结果证实此种方法非常有效。该体系中SERS的信号强度依赖于4MBA-Ag的聚集程度。该研究结果有助于实现聚集体SERS标记物在生物成像、检测和传感等方面的应用。

Abstract

In order to realize the unltrasensitive analysis by using the surface enhanced Raman scattering (SERS)

we presented a simple and reproducible approach to encapsulate the aggregation of 4-mercaptobenzoic acid-modified Ag nanoparticles with silica. In order to obtain "hot spot"

the level of aggregation could be controlled by varying the concentration of NaNO

and then the aggregation was coated with silica

which was demonstrated with SEM. In conclusion

the SERS signal seriously depended on the level of aggregation. Due to the strong enhancement effect

this technique has the potential in biomedical field.

关键词

Keywords

references

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