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

TitleFilm-coupled nanoparticles by atomic layer deposition: Comparison with organic spacing layers
Publication TypeJournal Article
Year of Publication2014
AuthorsC. Ciracì, X. Chen, J.J. Mock, F. McGuire, X. Liu, S-H. Oh, D.R. Smith
JournalApplied Physics Letters
Volume104
Issue2
Pagination023109
Date Published01/2015
ISSN0003-6951
Abstract

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. (C) 2014 AIP Publishing LLC.

URLhttp://scitation.aip.org/content/aip/journal/apl/104/2/10.1063/1.4861849
DOI10.1063/1.4861849
Short TitleAppl. Phys. Lett.