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