Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.
Data(s) |
13/10/2010
|
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Formato |
4150 - 4154 |
Identificador |
http://www.ncbi.nlm.nih.gov/pubmed/20804206 Nano Lett, 2010, 10 (10), pp. 4150 - 4154 http://hdl.handle.net/10161/4095 1530-6992 |
Idioma(s) |
ENG en_US |
Relação |
Nano Lett 10.1021/nl102443p Nano Letters |
Palavras-Chave | #Gold #Light #Nanoparticles #Nanostructures #Nanotechnology #Spectrum Analysis, Raman #Static Electricity |
Tipo |
Journal Article |
Cobertura |
United States |
Resumo |
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. 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. |