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首页> 外文期刊>RSC Advances >Selective and sensitive SERS sensor for detection of Hg2+ in environmental water base on rhodamine-bonded and amino group functionalized SiO2-coated Au-Ag core-shell nanorods
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Selective and sensitive SERS sensor for detection of Hg2+ in environmental water base on rhodamine-bonded and amino group functionalized SiO2-coated Au-Ag core-shell nanorods

机译：选择性和敏感的SERS传感器，用于检测罗丹明键合和氨基官能化SiO2涂覆的Au-Ag核心壳纳米棒的环境水碱中的HG2 +

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摘要

Here, we designed a new type of SERS sensor with high selectivity and sensitivity for the determination of Hg2+ at picomolar concentrations based on hydrolysis reactions. The Rhodamine 6G-derived Schiff base bonded and amino group functionalized SiO2-coated Au-Ag core-shell nanorods (Au@Ag@SiO2-NH2-R6G, NR-Rs), which show extraordinary enhancement factors (EF) and good stability, were employed as the SERS substrate of the sensor. The tunable ability of the chemical bonding of the substrate generates appropriate probe molecules bound to the surface of the nanorods (NRs) and improves the selectivity and sensitivity of the SERS sensor dramatically. The limit of detection (LOD) of Hg2+ obtained using the present SERS sensor was 0.33 pmol L-1. Furthermore, the proposed substrate has pH-responsive ability. The present sensor is suitable for the on-site determination of pH and Hg2+ by combining with a portable Raman spectrometer.
机译：在这里，我们设计了一种新型的SERS传感器，具有高选择性和灵敏度，用于基于水解反应测定HG2 +的HG2 +。 罗丹明6G衍生的席夫基粘合和氨基官能化SiO2涂层Au-Ag核 - 壳纳米棒（Au @ Ag @ SiO2-NH2-R6G，NR-RS），其显示出非凡的增强因子（EF）和良好的稳定性， 用作传感器的SERS基板。 基板的化学键合的可调谐能力产生与纳米棒（NRS）的表面结合的合适的探针分子，并提高了SERS传感器的选择性和灵敏度。 使用本SERS传感器获得的HG2 +的检测极限为0.33pmol L-1。 此外，所提出的基底具有pH响应能力。 通过与便携式拉曼光谱仪组合，本发明传感器适用于在现场测定pH和HG2 +。

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  • 来源
    《RSC Advances》 |2015年第41期|共7页
  • 作者

    Ma Pinyi; Liang Fanghui; Diao Quanping; Wang Di; Yang Qingqing; Gao Dejiang; Song Daqian; Wang Xinghua;

  • 作者单位

    Jilin Univ Coll Chem Changchun 130012 Peoples R China;

    Changchun Med Coll Dept Pharm Changchun 130031 Peoples R China;

    Anshan Normal Univ Sch Chem &

    Life Sci Anshan 114005 Peoples R China;

    Jilin Univ Coll Chem Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem Changchun 130012 Peoples R China;

    Changchun Jilin Univ Little Swan Instruments Co L Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem Changchun 130012 Peoples R China;

    Jilin Univ Coll Chem Changchun 130012 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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