Designing, fabricating, and imaging Raman hot spots

Lidong Qin; Shengli Zou; Can Xue; Ariel Atkinson; George C. Schatz; Chad A. Mirkin

doi:10.1073/pnas.0605889103

Designing, fabricating, and imaging Raman hot spots

Lidong Qin, Shengli Zou, Can Xue, Ariel Atkinson, George C. Schatz, Chad A. Mirkin

Academic Institute

Research output: Contribution to journal › Article › peer-review

420 Scopus citations

Abstract

We have developed a probe of the electromagnetic mechanism of surface-enhanced Raman scattering via Au nanodisk arrays generated by using on-wire lithography. In this approach, disk thickness and interparticle gap are precisely controlled from 5 nm to many micrometers. Confocal Raman microscopy demonstrates that disk thickness and gap play a crucial role in determining surface-enhanced Raman scattering intensities. Theoretical calculations also demonstrate that these results are consistent with the electromagnetic mechanism, including the surprising result that the largest enhancement does not occur for the smallest gaps.

Original language	English (US)
Pages (from-to)	13300-13303
Number of pages	4
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	103
Issue number	36
DOIs	https://doi.org/10.1073/pnas.0605889103
State	Published - Sep 5 2006

Keywords

Discrete dipole approximation
Electromagnetic mechanism
Nanofabrication
Surface-enhanced Raman scattering
Templated synthesis

ASJC Scopus subject areas

Genetics
General

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10.1073/pnas.0605889103

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AU - Qin, Lidong

AU - Zou, Shengli

AU - Xue, Can

AU - Atkinson, Ariel

AU - Schatz, George C.

AU - Mirkin, Chad A.

PY - 2006/9/5

Y1 - 2006/9/5

N2 - We have developed a probe of the electromagnetic mechanism of surface-enhanced Raman scattering via Au nanodisk arrays generated by using on-wire lithography. In this approach, disk thickness and interparticle gap are precisely controlled from 5 nm to many micrometers. Confocal Raman microscopy demonstrates that disk thickness and gap play a crucial role in determining surface-enhanced Raman scattering intensities. Theoretical calculations also demonstrate that these results are consistent with the electromagnetic mechanism, including the surprising result that the largest enhancement does not occur for the smallest gaps.

AB - We have developed a probe of the electromagnetic mechanism of surface-enhanced Raman scattering via Au nanodisk arrays generated by using on-wire lithography. In this approach, disk thickness and interparticle gap are precisely controlled from 5 nm to many micrometers. Confocal Raman microscopy demonstrates that disk thickness and gap play a crucial role in determining surface-enhanced Raman scattering intensities. Theoretical calculations also demonstrate that these results are consistent with the electromagnetic mechanism, including the surprising result that the largest enhancement does not occur for the smallest gaps.

KW - Discrete dipole approximation

KW - Electromagnetic mechanism

KW - Nanofabrication

KW - Surface-enhanced Raman scattering

KW - Templated synthesis

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Designing, fabricating, and imaging Raman hot spots

Abstract

Keywords

ASJC Scopus subject areas

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