DOI: 10.1126/science.1159499. Measurement of the Distribution of Site Enhancements in Surface-Enhanced Raman Scattering

Measurement of the Distribution of Site Enhancements in Surface-Enhanced Raman Scattering

10.1126/science.1159499

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

On nanotextured noble-metal surfaces, surface-enhanced Raman scattering (SERS) is observed, where Raman scattering is enhanced by a factor, Ḡ , that is frequently about one million, but underlying the factor Ḡ is a broad distribution of local enhancement factors, η. We have measured this distribution for benzenethiolate molecules on a 330-nanometer silver-coated nanosphere lattice using incident light of wavelength 532 nanometers. A series of laser pulses with increasing electric fields burned away molecules at sites with progressively decreasing electromagnetic enhancement factors. The enhancement distribution P (η) d η was found to be a power law proportional to (η) –1.75 , with minimum and maximum values of 2.8 × 10 4 and 4.1 × 10 10 , respectively. The hottest sites (η >10 9 ) account for just 63 in 1,000,000 of the total but contribute 24% to the overall SERS intensity.

Bibliography

Fang, Y., Seong, N.-H., & Dlott, D. D. (2008). Measurement of the Distribution of Site Enhancements in Surface-Enhanced Raman Scattering. Science, 321(5887), 388â392.

Authors 3

Ying Fang (first)
Nak-Hyun Seong (additional)
Dana D. Dlott (additional)

References 32 Referenced 1,034

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Materials and methods are detailed in supporting online material available at Science Online.
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This material is based on work supported by NSF under award DMR 0504038 the Air Force Office of Scientific Research under award FA9550-06-1-0235 and the Army Research Office under award W911NF-05-1-0345. Electron microscopy was carried out in the Center for Microanalysis of Materials University of Illinois which is supported by the U.S. Department of Energy under grant DEFG02-91ER45439.

Dates

Type	When
Created	17 years, 2 months ago (June 26, 2008, 9:38 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 3:30 a.m.)
Indexed	2 days, 1 hour ago (Sept. 4, 2025, 9:41 a.m.)
Issued	17 years, 1 month ago (July 18, 2008)
Published	17 years, 1 month ago (July 18, 2008)
Published Print	17 years, 1 month ago (July 18, 2008)

Funders 0

None

BibTeX

@article{Fang_2008, title={Measurement of the Distribution of Site Enhancements in Surface-Enhanced Raman Scattering}, volume={321}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1159499}, DOI={10.1126/science.1159499}, number={5887}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Fang, Ying and Seong, Nak-Hyun and Dlott, Dana D.}, year={2008}, month=jul, pages={388–392} }

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