首页> 外文OA文献 >Enhanced Raman Scattering by Polystyrene Microspheres and Application for Detecting Molecules Adsorbed on Au Single Crystal Surface
【2h】

Enhanced Raman Scattering by Polystyrene Microspheres and Application for Detecting Molecules Adsorbed on Au Single Crystal Surface

机译:聚苯乙烯微球增强的拉曼散射及其在金单晶表面吸附分子检测中的应用

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

By assembling polystyrene microsphores on a sample Surface, the surface Raman signal Could be enhanced. The dependence of the enhancement effect on the size of microparticles was systematically investigated and it was found that microparticles with a diameter of 3.00 mu m showed the highest enhancement of ca 5 folds. By utilizing the enhancement effect of the microspheres. the surface Raman intensity of malachite green isothiocyanate (MGITC) adsorbed on Au(111) surface could be enhanced by 20 folds, indicating that this method could effectively improve the detection sensitivity of surface Raman spectroscopy for the adsorbed species on single crystal surface. The later signal increment corresponds to the Raman enhancement effect of nearly 3 orders of magnitude. The enhancement effect is mainly owing to the formation of nanojets when a laser is focused on the microspheres of appropriate diameter. The formation of nanojets will lead to the highly localized electromagnetic field, which will then significantly enhance the Raman process in the nanojets. The main reason for obtaining different enhancements on two types of samples was analyzed.
机译:通过在样品表面上组装聚苯乙烯荧光体,可以增强表面拉曼信号。系统地研究了增强效果对微粒尺寸的依赖性,并且发现直径为3.00μm的微粒表现出最高的约5倍的增强。通过利用微球的增强作用。孔雀绿异硫氰酸盐(MGITC)吸附在Au(111)表面上的表面拉曼强度可提高20倍,表明该方法可有效提高表面拉曼光谱对单晶表面吸附物质的检测灵敏度。较晚的信号增量对应于近3个数量级的拉曼增强效应。增强效果主要归因于当激光聚焦在适当直径的微球上时形成的纳米射流。纳米射流的形成将导致高度局部化的电磁场,这将大大增强纳米射流中的拉曼过程。分析了在两种类型的样本上获得不同增强效果的主要原因。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

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