Graphical abstract<'/> Synergistic effects of semiconductor substrate and noble metal nano-particles on SERS effect both theoretical and experimental aspects
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Synergistic effects of semiconductor substrate and noble metal nano-particles on SERS effect both theoretical and experimental aspects

机译：半导体衬底和贵金属纳米粒子对SERS的协同效应在理论和实验方面均具有影响

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Graphical abstractDisplay OmittedHighlights•SERS effect of Ag, Au, Cu increases with the decreasing of the inter distance of particles.•SERS effect of Ag on Ge>Si; the SERS effect of Agon SiO22O3; the SERS effect of Ag on SiO2•Silver nanoparticles prepared by chemical method show that the SERS enhancement effect of Ag-SiO2substrate is best.AbstractAs a means of chemical identification and analysis, Surface enhanced Raman spectroscopy (SERS), with the advantages of high sensitivity and selectivity, non-destructive, high repeatability and in situ detection etc., has important significance in the field of composition detection, environmental science, biological medicine etc. Physical model of coupling effect between different semiconductor substrates and noble metal particles were investigated by using 3D-FDTD method. Mechanism and the effects of excitation wavelength, particle spacing and semiconductor substrate types on the SERS effect were discussed. The results showed that the optimal excitation wavelengths of three noble metals of Ag, Au, Cu, were located at 510, 600 and 630nm, respectively; SERS effect of Ag, Au, Cu increases with the decreasing of the inter distance of particles, while the distance of the NPs reaches the critical value of 3nm, the strength of SERS effect will be greatly enhanced. For the four different types of substrate of Ge, Si, SiO2(glass) and Al2O3, the SERS effect of Ag on SiO2Al2O32substrate is best. The results of this study have important theoretical significance to explain the variations of SERS enhancement on different noble metals, which is also an important guide for the preparation of SERS substrates, especially for the microfluidics. The better Raman effect can be realized by choosing proper substrate type, particle spacing and excitation wavelength, result in expanding the depth and width of SERS application.
机译： 图形摘要 < ce：simple-para>省略显示 突出显示 • Ag的SERS效应，Au，Cu随着粒子间距的减小而增加。 • Ag对Ge> Si的SERS效应； SiO 2 2 O 3 ; Ag对SiO 2 • 通过化学方法制备的银纳米颗粒显示出Ag-SiO 2 衬底是最好的。 摘要 表面增强拉曼光谱（SERS）作为化学识别和分析的一种手段，具有高灵敏度和选择性的优点，无损，高重复性和原位检测等，在成分检测，环境科学，生物领域具有重要意义利用3D-FDTD方法研究了不同半导体衬底与贵金属颗粒之间耦合作用的物理模型。讨论了激发波长，粒子间距和半导体衬底类型对SERS效应的机理及影响。结果表明，三种贵金属Ag，Au，Cu的最佳激发波长分别在510、600和630nm处。随着颗粒间距离的减小，Ag，Au，Cu的SERS作用增强，而NPs的距离达到3nm的临界值时，SERS作用的强度将大大提高。对于Ge，Si，SiO 2 （玻璃）和Al 2 的四种不同类型的衬底： inf> O 3 ，Ag对SiO 2 Al < ce：inf loc =“ post”> 2 O 3 2 衬底的SERS增强效果最好。这项研究的结果对解释不同贵金属上SERS增强的变化具有重要的理论意义，这对于制备SERS底物，特别是微流体，也具有重要的指导意义。通过选择合适的基板类型，粒子间距和激发波长，可以实现更好的拉曼效应，从而扩大SERS应用的深度和宽度。

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  • 来源
    《Applied Surface Science》 |2018年第1期|367-372|共6页
  • 作者

    Chen Yang; Pei Liang; Lisha Tang; Yongfeng Zhou; Yanting Cao; Yanxiong Wu; De Zhang; Qianmin Dong; Jie Huang; Peng He;

  • 作者单位

    College of Optical and Electronic Technology, China Jiliang University;

    College of Optical and Electronic Technology, China Jiliang University;

    College of Optical and Electronic Technology, China Jiliang University;

    College of Optical and Electronic Technology, China Jiliang University;

    College of Optical and Electronic Technology, China Jiliang University;

    College of Optical and Electronic Technology, China Jiliang University;

    College of Horticulture & Forestry Sciences, Huazhong Agricultural University, Key Laboratory of Horticultural Plant Biology, Ministry of Education;

    College of Optical and Electronic Technology, China Jiliang University;

    College of Optical and Electronic Technology, China Jiliang University;

    China National Environmental Monitoring Centre;

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  • 正文语种 eng
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  • 关键词

    Noble metal particles; FDTD; SERS; Synergistic effects;

    机译：贵金属颗粒FDTD SERS协同效应;

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