Molecules in the mirror: how SERS backgrounds arise from the quantum method of images.

Molecules in the mirror: how SERS backgrounds arise from the quantum method of images.
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DOI:
10.1039/c4cp00093e
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发表时间:
2014-04-14
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
Baumberg JJ
Baumberg JJ
中科院分区:
其他
文献类型:
--
作者:
Barnett SM;Harris N;Baumberg JJ

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SERS 背景可以源自等离子体表面附近的分子与其图像分子的相互作用。当它们放置在等离激元金属表面附近时,光与分子振动的拉曼耦合会发生强烈改变,除了正常的表面增强拉曼散射(SERS)峰之外,还会出现强烈的宽连续谱背景。使用图像的量子方法,我们对由于图像分子的电阻阻尼而不可避免地存在背景进行了简单但定量的解释。因此,该模型提出了增强 SERS 峰背景比的新策略。
The SERS background can be derived from the interaction of a molecule near a plasmonic surface with its image molecule. The Raman coupling of light to molecular vibrations is strongly modified when they are placed near a plasmonic metal surface, with the appearance of a strong broad continuum background in addition to the normal surface-enhanced Raman scattering (SERS) peaks. Using a quantum method of images approach, we produce a simple but quantitative explanation of the inevitable presence of the background, due to the resistive damping of the image molecule. This model thus suggests new strategies for enhancing the SERS peak to background ratio.
DOI: 10.1103/physrevlett.43.147
发表时间: 1979-01-01
影响因子: 8.6
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