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首页> 外文期刊>Applied Surface Science >Fabrication of novel compound SERS substrates composed of silver nanoparticles and porous gold nanoclusters: A study on enrichment detection of urea
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Fabrication of novel compound SERS substrates composed of silver nanoparticles and porous gold nanoclusters: A study on enrichment detection of urea

机译：银纳米颗粒和多孔金纳米簇组成的新型复合SERS底物的制备：尿素富集检测的研究

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摘要

A new type of surface-enhanced Raman scattering (SERS) substrate was fabricated through the layer-by-layer self-assembly of silver nanoparticles (AgNPs, av. 45 nm in diameter) and porous gold nanoclustersanoparticles (AuNPs, av. 143 nm in diameter). The development of the porosity of the AuNPs was investigated, and successful SERS applications of the porous AuNPs were also examined. As compared with AgNP films, the enhancement factor of Ag-Au compound substrates is increased 6 times at the concentration of 10(-6) M. This additional enhancement contributes to the trace-amount-detection of target molecules enormously. The contribution is generated through the increase of the usable surface area arising from the nanoscale pores distributed three-dimensionally in the porous AuNPs, which enrich the adsorption sites and hot spots for the adsorption of probe molecules, making the developed nanofilms highly sensitive SERS substrates. The substrates were used for the detection of a physiological metabolite of urea molecules. The results reached to a very low concentration of 1 mM and exhibited good quantitative character over the physiological concentration range (1 similar to 20 mM) under mimicking biophysical conditions. These results show that the prepared substrate has great potential in the ultrasensitive SERS-based detection and in SERS-based biosensors. (C) 2017 Elsevier B.V. All rights reserved.
机译：通过银纳米颗粒（AgNPs，直径约45 nm）和多孔金纳米团簇/纳米颗粒（AuNPs，约143）的逐层自组装，制造了一种新型的表面增强拉曼散射（SERS）衬底。直径（nm）。研究了AuNPs的孔隙率的发展，并检查了多孔AuNPs在SERS中的成功应用。与AgNP薄膜相比，Ag-Au复合底物的增强因子在10（-6）M的浓度下增加了6倍。这种额外的增强极大地有助于目标分子的痕量检测。产生的贡献是由于在多孔AuNPs中三维分布的纳米级孔引起的可用表面积增加而产生的，这增加了用于探针分子吸附的吸附位点和热点，从而使开发的纳米膜成为高度敏感的SERS基底。底物用于检测尿素分子的生理代谢产物。在模拟生物物理条件下，结果达到了非常低的1 mM浓度，并在生理浓度范围内（1个类似于20 mM）表现出良好的定量特性。这些结果表明，制备的底物在基于超敏SERS的检测和基于SERS的生物传感器中具有巨大的潜力。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2018年第ptab期|328-333|共6页
  • 作者

    Li Yali; Li Qianwen; Sun Chengbin; Jin Sila; Park Yeonju; Zhou Tieli; Wang Xu; Zhao Bing; Ruan Weidong; Jung Young Mee;

  • 作者单位

    Jilin Univ, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China;

    Kangwon Natl Univ, Inst Mol Sci & Fus Technol, Dept Chem, Chunchon 24341, South Korea;

    Kangwon Natl Univ, Inst Mol Sci & Fus Technol, Dept Chem, Chunchon 24341, South Korea;

    Changchun Univ, Coll Food Sci & Engn, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China;

    Kangwon Natl Univ, Inst Mol Sci & Fus Technol, Dept Chem, Chunchon 24341, South Korea;

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  • 关键词

    SERS; Porous Au nanoparticle; Ag-Au compound substrate; Urea detection; Biosensor;

    机译：SERS;多孔金纳米粒子;Ag-Au复合底物;尿素检测;生物传感器;

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