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首页> 外文学位 >Scaleable and reproducible fabrication of SERS (surface-enhanced Raman scattering) substrates with high enhancement factors.
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Scaleable and reproducible fabrication of SERS (surface-enhanced Raman scattering) substrates with high enhancement factors.

机译：具有高增强因子的SERS（表面增强拉曼散射）基板的可缩放和可复制制造。

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摘要

Surface enhanced Raman scattering is a technique that augments Raman spectroscopy by decreasing its detection limit to sub-monolayer coverage of molecules on a surface or even a single molecule. The ability to attain the unique molecular bonding information provided by Raman spectroscopy at trace detection levels makes SERS an attractive tool for applications such as explosives, chemical, and bioweapons detection, study of surface catalyzed reactions, biomolecule and cell characterization, and measurement of impurities in groundwater.;SERS requires substrates with plasmonic activity, such as nanostructured metal films or metallic nanoparticles. The increase in Raman signal which allows trace detection is characterized by a signal enhancement factor, which is the fourth power of the magnitude of the localized electric fields generated by surface plasmon resonance in these substrates.;Broad use of SERS is limited by the difficulties of fabricating plasmonic materials at large scale which show both a high enhancement factor and good reproducibility of signal. The use of spin-coating based nanofabrication techniques to generate more effective SERS substrates will be discussed. Spin-coating is an advantageous method because it can generate arrays of nanostructures which are unique, can combine a range of material systems, are highly uniform, and can be generated at wafer scale (∼12.6 in2). The plasmon resonance, SERS enhancement, and uniformity of a range of spin-coated substrates will be analyzed.
机译：表面增强拉曼散射是一种通过降低其检测极限，以扩大表面或什至单个分子在分子上的亚单层覆盖范围来增强拉曼光谱的技术。在痕量检测水平上获得拉曼光谱提供的独特分子键合信息的能力使SERS成为引爆，化学和生物武器检测，表面催化反应研究，生物分子和细胞表征研究以及杂质中杂质测量等应用的有吸引力的工具SERS需要具有等离子体活性的基质，例如纳米结构的金属膜或金属纳米颗粒。允许痕量检测的拉曼信号增加的特征在于信号增强因子，该因子是这些衬底中​​表面等离子体激元共振产生的局部电场强度的四次方。SERS的广泛使用受到以下困难的限制大规模制造等离激元材料，其显示出高的增强因子和良好的信号再现性。将讨论使用基于旋涂的纳米制造技术来生成更有效的SERS基板。旋涂是一种有利的方法，因为它可以生成独特的纳米结构阵列，可以结合多种材料系统，高度均匀，并且可以晶圆级（〜12.6 in2）生成。将分析一系列旋涂基材的等离子体共振，SERS增强和均匀性。

著录项

  • 作者

    Linn, Nicholas C.;

  • 作者单位

    University of Florida.;

  • 授予单位 University of Florida.;
  • 学科 Chemistry Physical.;Engineering Materials Science.;Engineering Chemical.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 140 p.
  • 总页数 140
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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