Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.

Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.
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DOI:
10.1021/nl102443p
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发表时间:
2010-10-13
期刊:
影响因子:
10.8
通讯作者:
Smith DR
Smith DR
中科院分区:
材料科学1区
文献类型:
--
作者:
Hill RT;Mock JJ;Urzhumov Y;Sebba DS;Oldenburg SJ;Chen SY;Lazarides AA;Chilkoti A;Smith DR

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在金属纳米结构之间的间隙内发生的强烈增强和局部化的光场可以被用于纳米光子和光学超材料应用中的广泛功能。在这里,我们介绍了一种精确控制这些纳米级的差距,通过应用分子间隔层,自组装到金膜上,金纳米粒子(NP)的静电沉积。使用三维有限元模型和测量从单个NP的模拟确认,通过该过程形成的间隙,NP和金膜之间,是高度可再现的表面增强共振拉曼散射(SERRS)的换能器。在间隔层约为1.6 nm的情况下,所有NP都表现出强的拉曼信号,该信号随着间隔层的增加而迅速衰减。
The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications. Here, we introduce a means of precise control over these nanoscale gaps through the application of a molecular spacer layer that is self-assembled onto a gold film, upon which gold nanoparticles (NPs) are deposited electrostatically. Simulations using a three-dimensional finite element model and measurements from single NPs confirm that the gaps formed by this process, between the NP and the gold film, are highly reproducible transducers of surface-enhanced resonant Raman scattering (SERRS). With a spacer layer of roughly 1.6 nm, all NPs exhibit a strong Raman signal that decays rapidly as the spacer layer is increased.
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影响因子: 3.3
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