Demonstrating photoluminescence from Au is electronic inelastic light scattering of a plasmonic metal: the origin of SERS backgrounds.

Demonstrating photoluminescence from Au is electronic inelastic light scattering of a plasmonic metal: the origin of SERS backgrounds.
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证明 Au 的光致发光是等离子体金属的电子非弹性光散射:SERS 背景的起源。

DOI:
10.1021/acs.nanolett.5b00146
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发表时间:
2015-04-08
期刊:
影响因子:
10.8
通讯作者:
Baumberg JJ
Baumberg JJ
中科院分区:
材料科学1区
文献类型:
--
作者:
Hugall JT;Baumberg JJ

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温度依赖的表面增强拉曼散射(Sers)被用来研究光致发光和背景连续谱,这是Sers中经常出现的现象,但其起源仍有争议。发现斯托克斯和反斯托克斯背景都由来自支持等离子体激元模式的贵金属纳米结构中的电子的非弹性光散射(ILS)主导。反斯托克斯背景是高度依赖于温度的,并示出了通过一个简单的模型与金属内的电子态的热占据。这表明了增强Sers灵敏度的新途径,以及提供纳米结构的无处不在和校准的实时温度测量。
Temperature-dependent surface-enhanced Raman scattering (SERS) is used to investigate the photoluminescence and background continuum always present in SERS but whose origin remains controversial. Both the Stokes and anti-Stokes background is found to be dominated by inelastic light scattering (ILS) from the electrons in the noble metal nanostructures supporting the plasmon modes. The anti-Stokes background is highly temperature dependent and is shown to be related to the thermal occupation of electronic states within the metal via a simple model. This suggests new routes to enhance SERS sensitivities, as well as providing ubiquitous and calibrated real-time temperature measurements of nanostructures.
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