Summary
International Symposium on Antennas and Propagation
2011
Session Number:WeA2
Session:
Number:WeA2-2
Surface-enhanced Raman scattering from a Nanoparticle-Molecule-Thin film Junction
Zee Hwan Kim,
pp.-
Publication Date:2011/10/25
Online ISSN:2188-5079
Summary:
We measured the surface-enhanced Raman scattering (SERS) of individual gold nanoparticle-4- aminobenzenethiol (ABT)-gold film junctions to investigate the plasmonic and chemical enhancements of the SERS signals. Despite the mild electromagnetic field enhancement ( 10^5 ) and high surface density of the ABT-molecules ( 240 molecules/hotspot) at the junctions, we observed the clear spectral and temporal signatures of single-molecule SERS (SM-SERS). The result proves that overall (chemical and electromagnetic) enhancement of 10^6 10^8 is sufficient to observe the SM-SERS, which disproves the widespread belief that minimum enhancement of 1014 is required for SM-SERS.