Film-coupled nanoparticles by atomic layer deposition: Comparison with organic spacing layers

Journal Article (Journal Article)

Film-coupled nanoparticle systems have proven a reliable platform for exploring the field enhancement associated with sub-nanometer sized gaps between plasmonic nanostructures. In this Letter, we present a side-by-side comparison of the spectral properties of film-coupled plasmon-resonant, gold nanoparticles, with dielectric spacer layers fabricated either using atomic layer deposition or using organic layers (polyelectrolytes or self-assembled monolayers of molecules). In either case, large area, uniform spacer layers with sub-nanometer thicknesses can be accurately deposited, allowing extreme coupling regimes to be probed. The observed spectral shifts of the nanoparticles as a function of spacer layer thickness are similar for the organic and inorganic films and are consistent with numerical calculations taking into account the nonlocal response of the metal. © 2014 AIP Publishing LLC.

Full Text

Duke Authors

Cited Authors

  • Ciracì, C; Chen, X; Mock, JJ; McGuire, F; Liu, X; Oh, SH; Smith, DR

Published Date

  • January 13, 2014

Published In

Volume / Issue

  • 104 / 2

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.4861849

Citation Source

  • Scopus