Code: MOE	Time Slot/Poster Number: 4:00 - 4:30 pm	Session: SERS (Substrates, Single Molecule, Theory) I
Single Molecule and Single Particle SERS
Richard Van Duyne
Northwestern University, Evanston, IL
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Summary
This lecture will cover recent developments from the Van Group in single-molecule surface-enhanced Raman spectroscopy (SMSERS), single particle surface-enhanced Raman spectroscopy (SPSERS) and the development of single nanoparticle LSPR spectroscopy spatially correlated with high resolution transmission electron microscopy (HRTEM).

Code: MOE	Time Slot/Poster Number: 4:30 - 5:00 pm	Session: SERS (Substrates, Single Molecule, Theory) I
Single-Molecule Raman Spectroscopy: A Probe of Charge Transfer and Plasmonic Fields
Gilad Haran
Weizmann Insitute, Rehovot, Israel
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Summary
We use single-molecule Raman spectroscopy as a probe for charge transfer (CT) interactions of 4-mercaptopyridine molecules adsorbed on silver islands within an electrochemical cell. CT enhances the Raman signal by 3-4 orders of magnitude. Electrode potential-dependent spectral changes are explained in terms of the theory of light-induced CT. We also show how single molecules can probe the surface plasmon fields within the gaps between silver nanoparticles. A nanoparticle dimer strongly enhances the Raman signal. A third particle may break the dimer symmetry. This surprising symmetry breaking is observed by registering depolarization ratios from individual molecules, and verified by theoretical calculations.

Code: MOE	Time Slot/Poster Number: 5:00 - 5:30 pm	Session: SERS (Substrates, Single Molecule, Theory) I
Blinking SERS from Single Ag Nanoaggregates with Various LSPR Wavelengths
Yukihiro Ozaki1; Yasutaka Kitahama1; Yuhei Tanaka1; Tamitake Itoh2
1Kwansei Gakuin University, 669-1337 , Japan; 2Health Technology Research Center, AIST, 761-0395, Japan
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Summary
Surface-enhanced Raman scattering (SERS) spectroscopy is sensitive enough to measure Raman spectrum of a single (or a few) molecule adsorbed on an Ag nanoaggregate. At a single molecule level, however, blinking SERS is observed. Blinking SERS is probably induced by that a single molecule goes in and out of an EM field at the junction, which enhanced by resonance of incident light with plasmon due to dipolar oscillation of conduction band electrons (localized surface plasmon resonance, LSPR). The purpose of the present study is to explore blinking statistics in SERS depending on LSPR.

Code: MOE	Time Slot/Poster Number: 5:30 - 5:50 pm	Session: SERS (Substrates, Single Molecule, Theory) I
A Unified Theory Of Surface Enhanced Raman Scattering
John Lombardi
City College of New York, New York, NY
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Summary
We derive a unified expression for surface-enhanced Raman scattering (SERS). The expression contains a product of three resonance denominators, representing the surface plasmon resonance, the metal-molecule charge-transfer resonance at the Fermi energy, and an allowed molecular resonance. This latter resonance is that from which intensity is borrowed for charge transfer, and when the molecular resonance is active it is responsible for surface-enhanced resonance Raman spectroscopy.

Code: MOE	Time Slot/Poster Number: 5:50 - 6:10 pm	Session: SERS (Substrates, Single Molecule, Theory) I
Nanoantenna Effect of SERS: Managing Light with Plasmons in the Nanometer Scale
Hongxing Xu
Institute of Physics, Chinese Academy of Science, Beijing, China
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Summary
Nanoplasmonics is a rapidly emerging branch of photonics, which offers variable means to manipulate light using surface plasmon excitations on metal nanostructures. Here, we firstly show our resent SERS studies on different metal nanostructures based on the electromagnetic enhancement, then we the studies on light propagation and polarization on the nanometer scale controlled by surface plasmons for SERS.