Double-Resonance Plasmon Substrates for Surface-Enhanced Raman Scattering with Enhancement at Excitation and Stokes Frequencies
Double-Resonance Plasmon Substrates for Surface-Enhanced Raman Scattering with Enhancement at Excitation and Stokes Frequencies
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DOI：
10.1021/nn901826q
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发表时间：
2010-05-01
期刊：
影响因子：
17.1
通讯作者：
Crozier, Kenneth B.
中科院分区：
文献类型：
--
作者：
Chu, Yizhuo;Banaee, Mohamad G.;Crozier, Kenneth B.
我们报道了一种在激发和斯托克斯频率下都具有等离子体共振的表面增强拉曼散射（Sers）基底。这种多层结构将纳米颗粒上的局部表面等离子体激元与金膜上激发的表面等离子体激元相结合。金器件的最大Sers增强因子测得为7.2 × 10（7），这比在玻璃衬底上的金纳米颗粒阵列上测得的增强因子大2个数量级以上。银器件的最大Sers增强测量为8.4 × 10（8）。
We report a surface-enhanced Raman scattering (SERS) substrate with plasmon resonances at both excitation and Stokes frequencies. This multilayer structure combines localized surface plasmons on the nanoparticles with surface plasmon polaritons excited on a gold film. The largest SERS enhancement factor for a gold device is measured to be 7.2 x 10(7), which is more than 2 orders of magnitude larger than that measured on a gold nanoparticle array on a glass substrate. The largest SERS enhancement for a silver device is measured to be 8.4 x 10(8).