Quantitative amplification of surface enhanced Raman scattering through plasmonic coupling in controlled nanoparticle assemblies

Shiuan-Yeh Chen; Anne A. Lazarides

doi:10.1117/12.828441

2 September 2009 Quantitative amplification of surface enhanced Raman scattering through plasmonic coupling in controlled nanoparticle assemblies

Shiuan-Yeh Chen, Anne A. Lazarides

Author Affiliations +

Proceedings Volume 7395, Plasmonics: Nanoimaging, Nanofabrication, and their Applications V; 73951S (2009) https://doi.org/10.1117/12.828441
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

Metal nanoparticle assemblies of well-defined structure are investigated as substrates for quantitative surface enhanced Raman scattering (SERS). The ~100 nm structures are formed from oligonucleotide-functionalized gold core and satellite particles. Raman scattering from Cy5 incorporated on the core particles is detected before and after formation of the coupled plasmonic structures. The amplification of Raman scattering observed upon formation of the coupled structures matches quantitatively the increase in the fourth power of the surface E-field associated with coupling between particles. Raman scattering per core-satellite structure is determined by calibrating measured intensities using methanol as an intensity standard. The number of molecules that contribute significantly to the Raman signal and the mean cross section per adsorbed molecule is determined by analysis of the spatial non-uniformity of the core surface field distribution. Comparison of the wavelength dependence of the near field and the scattering spectrum using simulation reveals that the wavelengths of the maxima in near and far fields are more closely aligned for the coupled structures than for isolated cores.

Citation Download Citation

Shiuan-Yeh Chen and Anne A. Lazarides "Quantitative amplification of surface enhanced Raman scattering through plasmonic coupling in controlled nanoparticle assemblies", Proc. SPIE 7395, Plasmonics: Nanoimaging, Nanofabrication, and their Applications V, 73951S (2 September 2009); https://doi.org/10.1117/12.828441

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available