Gold nanoparticles on polarizable surfaces as Raman scattering antennas.
Abstract
Surface plasmons supported by metal nanoparticles are perturbed by coupling to a surface
that is polarizable. Coupling results in enhancement of near fields and may increase
the scattering efficiency of radiative modes. In this study, we investigate the Rayleigh
and Raman scattering properties of gold nanoparticles functionalized with cyanine
deposited on silicon and quartz wafers and on gold thin films. Dark-field scattering
images display red shifting of the gold nanoparticle plasmon resonance and doughnut-shaped
scattering patterns when particles are deposited on silicon or on a gold film. The
imaged radiation patterns and individual particle spectra reveal that the polarizable
substrates control both the orientation and brightness of the radiative modes. Comparison
with simulation indicates that, in a particle-surface system with a fixed junction
width, plasmon band shifts are controlled quantitatively by the permittivity of the
wafer or the film. Surface-enhanced resonance Raman scattering (SERRS) spectra and
images are collected from cyanine on particles on gold films. SERRS images of the
particles on gold films are doughnut-shaped as are their Rayleigh images, indicating
that the SERRS is controlled by the polarization of plasmons in the antenna nanostructures.
Near-field enhancement and radiative efficiency of the antenna are sufficient to enable
Raman scattering cyanines to function as gap field probes. Through collective interpretation
of individual particle Rayleigh spectra and spectral simulations, the geometric basis
for small observed variations in the wavelength and intensity of plasmon resonant
scattering from individual antenna on the three surfaces is explained.
Type
Journal articleSubject
CarbocyaninesElectric Impedance
Gold
Metal Nanoparticles
Semiconductors
Silicon
Spectrum Analysis, Raman
Surface Properties
Permalink
https://hdl.handle.net/10161/4100Published Version (Please cite this version)
10.1021/nn101644sPublication Info
Chen, Shiuan-Yeh; Mock, Jack J; Hill, Ryan T; Chilkoti, Ashutosh; Smith, David R;
& Lazarides, Anne A (2010). Gold nanoparticles on polarizable surfaces as Raman scattering antennas. ACS Nano, 4(11). pp. 6535-6546. 10.1021/nn101644s. Retrieved from https://hdl.handle.net/10161/4100.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
Collections
More Info
Show full item recordScholars@Duke
Ashutosh Chilkoti
Alan L. Kaganov Distinguished Professor of Biomedical Engineering
Ashutosh Chilkoti is the Alan L. Kaganov Professor of Biomedical Engineering and Chair
of the Department of Biomedical Engineering at Duke University.
My research in biomolecular engineering and biointerface science focuses on the development
of new molecular tools and technologies that borrow from molecular biology, protein
engineering, polymer chemistry and surface science that we then exploit for the development
of applications that span the range from bioseparations, plasmonic bio
David R. Smith
James B. Duke Distinguished Professor of Electrical and Computer Engineering
Dr. David R. Smith is currently the James B. Duke Professor of Electrical and Computer
Engineering Department at Duke University. He is also Director of the Center for Metamaterials
and Integrated Plasmonics at Duke and holds the positions of Adjunct Associate Professor
in the Physics Department at the University of California, San Diego, and Visiting
Professor of Physics at Imperial College, London. Dr. Smith received his Ph.D. in
1994 in Physics from the University of California, San D
Alphabetical list of authors with Scholars@Duke profiles.

Articles written by Duke faculty are made available through the campus open access policy. For more information see: Duke Open Access Policy
Rights for Collection: Scholarly Articles
Works are deposited here by their authors, and represent their research and opinions, not that of Duke University. Some materials and descriptions may include offensive content. More info