Direct visual evidence for chemical mechanism of SERRS of the S-complex of pyrimidine molecule adsorbed on silver nanoparticle via charge transfer.
Direct visual evidence for chemical mechanism of SERRS of the S-complex of pyrimidine molecule adsorbed on silver nanoparticle via charge transfer.
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DOI：
10.1016/j.saa.2013.11.003
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Xin Zhang;Peijie Wang;Shaoxiang Sheng;Lisheng Zhang;Yan Fang
中科院分区：
文献类型：
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作者：
Xin Zhang;Peijie Wang;Shaoxiang Sheng;Lisheng Zhang;Yan Fang
本文以嘧啶分子的S-络合物吸附在银团簇上作为模型分子，研究了表面增强共振拉曼散射（SERRS）的增强机理。我们描述了共振激发下电荷从Ag 20转移到嘧啶的化学增强和电子团簇内集体振荡激发下团簇内电荷重新分布的电磁增强。结果表明，嘧啶分子在不同波长下吸附于银团簇表面的SERRS过程受不同的增强机制控制。实验和理论工作已经完成，以了解在SERRS的CT过程。
In this paper, the S-complex of pyrimidine molecule absorbed on silver clusters was employed as a model molecule to study the enhancement mechanism in surface-enhanced resonance Raman scattering (SERRS). We described the chemical enhancement of SERRS through charge transfer (CT) from Ag20to pyrimidine on resonance excitation, and electromagnetic enhancement through intracluster charge redistribution (CR) on the electronic intracluster collective oscillation excitation. It is shown that SERRS process of the pyrimidine molecule absorbed on silver clusters with different incident wavelength are dominated by different enhancement mechanisms. Both experimental and theoretical works have been performed to understand the CT process in SERRS.