高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (06): 1306.doi: 10.3969/j.issn.0251-0790.2012.06.031

• 物理化学 • 上一篇    下一篇

Ag/Si-NPA基底上共吸附R6G和CV的表面增强拉曼散射

王永强1,2, 王海燕1,3, 马省1, 李新建1   

  1. 1. 郑州大学物理工程学院, 材料物理教育部重点实验室, 郑州 450052;
    2. 河南理工大学物理化学学院, 焦作 454003;
    3. 郑州轻工业学院技术物理系, 郑州 450002
  • 收稿日期:2011-09-05 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 李新建, 男, 博士, 教授, 主要从事纳米材料物理与器件领域的基础和应用研究. E-mail: lixj@zzu.edu.cn E-mail:chui521@163.com
  • 基金资助:

    国家自然科学基金(批准号: 11074224)和河南省重大科技攻关项目(批准号: 082101510007)资助.

Surface-enhanced Raman Scattering of Rhodamine 6G and Crystal Violet Co-adsorbed on Ag/Si-NPA

WANG Yong-Qiang1,2, WANG Hai-Yan1,3, MA Sheng1, LI Xin-Jian1   

  1. 1. Department of Physics, Key Laboratory of Materials Physics, Ministry of Education, Zhengzhou University, Zhengzhou 450052, China;
    2. School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, China;
    3. Department of Technological Physics, Zhengzhou University of Light Industry, Zhengzhou 450002, China
  • Received:2011-09-05 Online:2012-06-10 Published:2012-06-10

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被引次数

7

摘要： 以硅纳米孔柱阵列(Si-NPA)为基底, 采用浸渍沉积技术制备了具有较高表面增强拉曼散射(SERS)活性的Ag/Si-NPA衬底, 并采用扫描电子显微镜和透射电子显微镜对其表面形貌和结构进行了表征. 在此基础上, 选择罗丹明6G(R6G)和结晶紫(CV)2种生物染料分子并采用不同的混合吸附程序对其共吸附状态下的SERS光谱进行了探测. 结果表明, 当2种分子的溶液浓度均为10-7 mol/L时, 无论采用何种浸渍吸附程序, 其SERS谱中CV的特征拉曼峰都被R6G完全掩盖. 对溶液采用错级配置(R6G和CV的浓度分别为10-9和10-7 mol/L)后, 所测SERS谱上获得了分别对应于R6G和CV的分离良好、相对强度匹配、分辨率高的2个SERS特征峰组, 从而有利于简化现实混合探测过程中对SERS特征峰的指认和判断.

关键词: 罗丹明6G, 结晶紫, 硅纳米孔柱阵列, Ag/Si-NPA, 表面增强拉曼散射, 共吸附

Abstract: Based on silicon nanoporous pillar array(Si-NPA), an active substrate(Ag/Si-NPA) with strong surface-enhanced Raman scattering(SERS) effect was prepared by an immersion plating method. The surface morphology and structure of Ag/Si-NPA were characterized by field-emission scanning electron microscopy(FESEM) and transmission electron microscopy(TEM). Choosing two important biological dyes, Rhodamine 6G(R6G) and crystal violet(CV), as the target materials and adopting three different adsorbing procedures, the SERS spectra for R6G and CV co-adsorbed on Ag/Si-NPA were detected. It was found that the Raman peaks for CV were completely glossed over by that of R6G when the concentration of both solutions was 10-7 mol/L, no matter what adsorbing procedure was adopted. The phenomenon was explained based on the experimental conditions and results. When the solution concentrations for R6G and CV were chosen as 10-9 and 10-7 mol/L, two groups of characteristic SERS peaks with good separation, well-matched relative intensity and high resolution, corresponding to R6G and CV, respectively, were obtained. Such a SERS spectrum was very helpful for predigesting the indexing and estimating procedure about the characteristic peaks. Our results might provid an investigable route for realizing the SERS detection of multi-dye labeled complex bio-molecule systems.

Key words: Rhodamine 6G(R6G), Crystal violet(CV), Silicon nanoporous pillar array(Si-NPA), Ag/Si-NPA, Surface-enhanced Raman scattering(SERS), Co-adsorption

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