Electron Enhanced Raman Scattering and Its Applications in Solution Chemistry
Electron Enhanced Raman Scattering and Its Applications in Solution Chemistry
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DOI：
10.2116/analsci.23.769
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发表时间：
2007-07
影响因子：
1.6
通讯作者：
Hiroharu Yui
中科院分区：
文献类型：
--
作者：
Hiroharu Yui
本文介绍了一种增强水溶液中拉曼散射的新技术。拉曼散射光谱具有区分具有高度相似性的分子的固有能力，并在其官能团水平上提供有关局部物理和化学环境的有用信息。由于水分子的拉曼散射信号非常微弱，因此拉曼光谱对水环境中痕量分析物的检测或鉴别具有很大的优势。然而，拉曼散射截面本身就很小，通常需要高功率激发和较长的采集时间才能获得高质量的拉曼光谱。这些条件对活细胞分析和环境分析的实时监测造成不利影响。在这里，我描述了一种新的拉曼增强技术，即“电子增强拉曼散射（EERS）”，其中人工产生的电子额外影响目标分子体系的极化性并增强其固有的拉曼截面。介绍了EERS的原理及其在水溶液中的应用。
The present review describes a new enhancement technique for Raman scattering in aqueous solutions. Raman scattering spectroscopy has an inherent ability to distinguish between molecules with great similarity and provides useful information on local physical and chemical environments at their functional groups’ level. Since the Raman scattering signals from water molecules are quite weak, Raman spectroscopy has great advantage for detection or discrimination of a trace amount of analytes in aqueous environments. However, Raman scattering cross-sections are inherently small and it generally requires high power excitation and long acquisition times to obtain high-quality Raman spectra. These conditions create disadvantages for the analyses for living cells and real-time monitoring for environmental analyses. Here, I describe a new Raman enhancement technique, namely “electron enhanced Raman scattering (EERS)”, where artificially generated electrons additionally affect the polarizability of target molecular systems and enhance their inherent Raman cross-section. Principles of the EERS and its applications to aqueous solutions are presented.