癸烷硫醇修饰的金/银SERS衬底用于PCB-77检测的研究

J4 ›› 2012, Vol. 29 ›› Issue (3): 357-361.

癸烷硫醇修饰的金/银SERS衬底用于PCB-77检测的研究

张袁芸张兴坊曹杰毛庆和

中国科学院安徽光学精密机械研究所，安徽省光子器件与材料重点实验室，安徽合肥 230031

收稿日期:2011-04-12 修回日期:2011-12-20 出版日期:2012-05-28 发布日期:2012-05-22
通讯作者: 毛庆和（1963－）研究员，博士生导师，主要从事微纳光子学、光纤激光等方面的研究。 E-mail:mqinghe@aiofm.ac.cn
作者简介:张袁芸(1983－)研究生, 主要从事微纳光子学方面的研究。Email：zhangyuanyun21@yahoo.com.cn
基金资助:
国家重点基础研究发展计划(973计划)资助项目(2007CB936603), 国家高技术研究发展计划(863计划)资助项目(2011AA030203)

Research of decanethiol-modified Au/Ag SERS substrates for the detection of polychlorinated biphenyl-77

ZHANG Yuanyun, ZHANG Xingfang, CAO Jie, MAO Qing-he

Anhui Provincial Key Laboratory of Photonics Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China

Received:2011-04-12 Revised:2011-12-20 Published:2012-05-28 Online:2012-05-22

摘要/Abstract

摘要：

通过模板法制备了强SERS活性的“球加片”Au/Ag纳米结构阵列，并利用这种纳米衬底对PCB-77分子的SERS光谱进行了研究。结果表明，尽管该纳米结构能够检测到PCB-77分子的SERS特征峰，但信噪比低。利用癸烷硫醇中的巯基与贵金属之间相互作用，实现了癸烷硫醇分子对纳米结构表面的功能化修饰，研究发现此时PCB-77分子的SERS光谱质量得到了明显改善。并且，这种“球加片”衬底的癸烷硫醇分子最优修饰时间为36小时，利用经36小时修饰后的纳米衬底，极大地提高了PCB-77的SERS光谱特征峰的强度。

关键词: 光谱学, 纳米阵列, 表面增强拉曼散射, 功能化修饰, PCB-77

Abstract:

A “sphere plus plate”-composed Au/Ag nanostructure arrays with strong Surface-enhanced Raman scattering (SERS) activity are fabricated through the templated method, and the SERS spectrum of polychlorinated biphenyl-77(PCB-77) based on this nanostructure is investigated. The results indicate that the characteristic Raman-shift peaks of PCB-77 may be observed with the bare SERS substrate, but the signal-to-noise ratio of SERS Spectrum is too low. By functionalization-modifying decanethiol (DT) on the surface of the bare SERS substrate with the help of the interaction between the –SH group of DT and novel metals, the SERS spectrum of PCB-77 is obviously improved. With the optimal functionalization-modified SERS substrate which is soaked in the DT solution for 36 hours, and the characteristic Raman-shift peaks’ intensity of the SERS spectrum of PCB-77 gets enhanced greatly.

Key words: spectroscopy, nano-structured arrays, SERS, functionalization -modified, PCB-77

中图分类号:

O433

张袁芸张兴坊曹杰毛庆和. 癸烷硫醇修饰的金/银SERS衬底用于PCB-77检测的研究[J]. J4, 2012, 29(3): 357-361.

ZHANG Yuanyun, ZHANG Xingfang, CAO Jie, MAO Qing-he. Research of decanethiol-modified Au/Ag SERS substrates for the detection of polychlorinated biphenyl-77[J]. J4, 2012, 29(3): 357-361.

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