• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied optics >Application of attenuated total reflection surface-plasmon-polariton Raman spectroscopy to gold and copper
【24h】

Application of attenuated total reflection surface-plasmon-polariton Raman spectroscopy to gold and copper

机译：衰减全反射表面等离子体激元拉曼光谱在金和铜中的应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An attenuated total reflection (ATR) method to excite the surface plasmon polariton (SPP) was applied to gold and copper to improve the sensitivity level of classical Raman spectroscopy. Reflectivity and Raman band intensity from copper phthalocyanine (CuPc) adsorbates on these metals were measured in an Otto configuration as a function of the angle of incidence and gap size at various excitation wavelengths. The SPP's on gold and copper were most efficiently excited at a wavelength of 632.8 nm according to the sufficiently large real part and the small imaginary part in the diQectric constants. It yields an enhancement factor of approximately 50 and 23 for Raman band intensity from CuPc 6 nm thick on gold and copper, respectively Furthermore the significantly larger enhancement factor of similar to 100 was obtained for a self-assembled monolayer of p-nitrothiophenol on gold at 632.8-nm excitation, probably owing to its smaller imaginary part value. It enabled us to observe the electrochemical reduction to p-aminothiophenol in situ and gave clear evidence of charge transfer resonance as observed for the silver system. Conclusively, the ATR-SPP method is essential to enhancing a quite weak Raman signal from adsorbates on gold and copper surfaces as well as silver. (C) 1997 Optical Society of America
机译：将激发表面等离子体激元（SPP）的衰减全反射（ATR）方法应用于金和铜，以提高经典拉曼光谱的灵敏度。在Otto构型中测量了酞菁铜（CuPc）吸附在这些金属上的反射率和拉曼能带强度，它是入射角和间隙尺寸在各种激发波长下的函数。根据DiQectric常数中足够大的实部和小的虚部，金和铜上的SPP在632.8 nm的波长下最有效地被激发。在金和铜上，厚度分别为6 nm的CuPc产生的拉曼能带强度分别为约50和23的增强因子。此外，对于对硝基硫代苯酚在金上的自组装单层膜，获得的拉曼谱带的增强因子接近100。 632.8 nm激发，可能是由于其虚部值较小。它使我们能够观察到电化学还原为对氨基苯酚的原位反应，并提供了如银系统所观察到的电荷转移共振的清晰证据。总之，ATR-SPP方法对于增强来自金，铜和银表面吸附物的拉曼信号非常重要。 （C）1997年美国眼镜学会

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