Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Hill, RT; Mock, JJ; Urzhumov, Y; Sebba, DS; Oldenburg, SJ; Chen, SY; Lazarides, AA; Chilkoti, A; Smith, DR

Published Date

  • October 13, 2010

Published In

Volume / Issue

  • 10 / 10

Start / End Page

  • 4150 - 4154

PubMed ID

  • 20804206

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

Digital Object Identifier (DOI)

  • 10.1021/nl102443p


  • eng

Conference Location

  • United States