Inelastic scattering and emission correlated with enormous SERS of dye adsorbed on Ag nanoparticles
Inelastic scattering and emission correlated with enormous SERS of dye adsorbed on Ag nanoparticles
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DOI：
10.1016/j.cplett.2005.05.083
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发表时间：
2005-08-25
影响因子：
2.8
通讯作者：
Futamata, M
中科院分区：
文献类型：
--
作者：
Maruyama, Y;Futamata, M
关于吸附在热银纳米颗粒上的染料分子的 SERS 的巨大增强，在 550-600 和 600-750 nm 处观察到两个不同的非弹性峰和发射峰。根据不同表面覆盖度和不同染料种类的光谱变化，较短和较长波长的峰分别源自金属上的激发电子和分子的荧光。此外，我们发现较短波长的峰值显示出不变的斯托克斯位移，与激发波长无关，表明它是由表面粗糙度或吸附分子引起的激发电子的非弹性散射引起的。 (c) 2005 Elsevier B.V. 保留所有权利。
With respect to the enormous enhancement in SERS of dye molecules adsorbed on hot Ag nanoparticles, two distinct inelastic and emission peaks were observed at 550-600 and 600-750 run. Based on the spectral variations for different surface coverage and for different dye species, the shorter and longer wavelength peaks were originated from excited electron on metal, and from fluorescence of molecules, respectively. Furthermore, we found the shorter wavelength peak shows invariant Stokes shift irrespective of excitation wavelengths, indicating it arises from inelastic scattering of excited electron by surface roughness or by adsorbed molecules. (c) 2005 Elsevier B.V. All rights reserved.