• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Porous MgF2-over-gold nanoparticles (MON) as plasmonic substrate for analytical applications
【24h】

Porous MgF2-over-gold nanoparticles (MON) as plasmonic substrate for analytical applications

机译：多孔MgF2过金纳米颗粒（MON）作为分析应用的等离子体基材

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Porous MgF _(2) -over-nanoparticles (MON) surfaces are fabricated from immobilized gold nanoparticles of different sizes on a glass surface by coating them with a magnesium fluoride layer. High mechanical stability of the resulting plasmonic surface is obtained, and optical spectroscopy across a very wide optical window is enabled. The nanoscopic characterization by scanning force microscopy and electron microscopy shows a uniform assembly of the gold nanoparticles in monolayers and a complete coating by magnesium fluoride. Surface-enhanced Raman scattering (SERS) experiments provide evidence that organic analyte molecules have free access to the gold surface, and interact with the immobilized nanoparticles in a very similar fashion as with uncoated surfaces. As the spectroscopic results indicate, the coating leads to properties that are favourable for plasmonic enhancement of optical processes excited in the visible and near-infrared. As demonstrated by experiments using SERS, as well as by finite difference time domain (3D-FDTD) simulations, enhancement factors are obtained that allow for analytical applications with optical excitations ranging from the visible to the near infrared.
机译：通过用氟化镁层涂覆它们，通过将它们的固定化的金纳米颗粒的不同尺寸的固定的金纳米颗粒制成多孔MgF _（2）。获得所得等离子体表面的高机械稳定性，并且能够跨越非常宽的光学窗口的光学光谱。扫描力显微镜和电子显微镜的纳米镜表征显示了单层中的金纳米颗粒的均匀组装，并通过氟化镁完全涂布。表面增强的拉曼散射（SERS）实验提供了有机分析物分子可以自由进入金表面，并以与未涂覆的表面非常相似的方式与固定的纳米颗粒相互作用。随着光谱结果表明，涂​​层导致有利于在可见和近红外激发的光学过程的等离子体增强的性质。如使用SERS的实验所证明的，并且通过有限差分时间域（3D-FDTD）模拟，获得增强因子，其允许具有光学激发的分析应用，从而从近红外的可见光。

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