Work

Exploring the chemical enhancement for surface-enhanced Raman scattering with Au bowtie nanoantennas

Year: 2006

Type: article

Abstract: Single metallic bowtie nanoantennas provide a controllable environment for surface-enhanced Raman scattering (SERS) of adsorbed molecules. Bowties have experimentally measured electromagnetic enhancements, enabling estimation of chemical enhancement for both the bulk and the few-molecule regime. Strong fluctuations of selected Raman lines imply that a small number of p-mercaptoaniline molecules on a single bowtie show chemical enhancement >10(7), much larger than previously believed, likely due to charge transfer between the Au surface and the molecule. This chemical sensitivity of SERS has significant implications for ultra-sensitive detection of single molecules.

Source: The Journal of Chemical Physics

DOI: 10.1063/1.2167649

Authors: David P. Fromm, Arvind Sundaramurthy, Anika Kinkhabwala, P. James Schuck, Gordon S. Kino, W. E. Moerner

Institution: Stanford University

Language: English

Topic: Gold and Silver Nanoparticles Synthesis and Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: National Institute of General Medical Sciences

Award: Development of Single-Biomolecule Optical Imaging