Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.
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.
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Related Subject Headings
- Static Electricity
- Spectrum Analysis, Raman
- Nanotechnology
- Nanostructures
- Nanoscience & Nanotechnology
- Nanoparticles
- Light
- Gold
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Static Electricity
- Spectrum Analysis, Raman
- Nanotechnology
- Nanostructures
- Nanoscience & Nanotechnology
- Nanoparticles
- Light
- Gold