...
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Wavelength Dependence of Raman Enhancement from Gold Nanorod Arrays: Quantitative Experiment and Modeling of a Hot Spot Dominated System
【24h】

Wavelength Dependence of Raman Enhancement from Gold Nanorod Arrays: Quantitative Experiment and Modeling of a Hot Spot Dominated System

机译:金纳米棒阵列拉曼增强的波长依赖性:热点控制系统的定量实验和建模

获取原文
获取原文并翻译 | 示例
           

摘要

Surface-enhanced Raman scattering (SERS) spectra from molecules adsorbed on the surface of vertically aligned gold nanorod arrays exhibit a variation in enhancement factor (EF) as a function of excitation wavelength that displays little correlation with the elastic optical properties of the surface. The key to understanding this lack of correlation and to obtaining agreement between experimental and calculated EF spectra lies with consideration of randomly distributed, sub-10 nm gaps between nanorods forming the substrate. Intense fields in these enhancement "hot spots" make a dominant contribution to the Raman scattering and have a very different spectral profile to that of the elastic optical response, petailed modeling of the electric field enhancement at both excitation and scattering wavelengths was used to quantitatively predict both the spectral profile and the magnitude of the observed EF.
机译:来自吸附在垂直排列的金纳米棒阵列表面上的分子的表面增强拉曼散射(SERS)光谱显示出增强因子(EF)随激发波长的变化,而与表面的弹性光学特性几乎没有关系。理解这种缺乏相关性并在实验和计算的EF光谱之间达成一致的关键在于考虑形成基底的纳米棒之间随机分布的,低于10 nm的间隙。这些增强“热点”中的强场对拉曼散射起主要作用,并且与弹性光学响应的​​光谱轮廓非常不同,使用激发和散射波长下电场增强的微弱建模来定量预测观测到的EF的频谱轮廓和大小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号