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The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.

Wavelength-Scanned Surface-Enhanced Raman Excitation Spectroscopy

McFarland, Adam D., Young, Matthew A., Dieringer, Jon A., Van Duyne, Richard P.·2005·The Journal of Physical Chemistry B

Abstract

A detailed wavelength-scanned surface-enhanced Raman excitation spectroscopy (WS SERES) study of benzenethiol adsorbed on Ag nanoparticle arrays, fabricated by nanosphere lithography (NSL), is presented. These NSL-derived Ag nanoparticle array surfaces are both structurally well-characterized and extremely uniform in size. The WS SERES spectra are correlated, both spatially and spectrally, with the corresponding localized surface plasmon resonance (LSPR) spectra of the nanoparticle arrays. The surface-enhanced Raman scattering (SERS) spectra were measured in two excitation wavelength ranges: (1) 425-505 nm, and (2) 610-800 nm, as well as with the 532-nm line from a solid-state diode-pumped laser. The WS SERES spectra have line shapes similar to those of the LSPR spectra. The maximum SERS enhancement factor is shown to occur for excitation wavelengths that are blue-shifted with respect to the LSPR lambda(max) of adsorbate-covered nanoparticle arrays. Three vibrational modes of benzenethiol (1575, 1081, and 1009 cm(-1)) are studied simultaneously on one substrate, and it is demonstrated that the smaller Raman shifted peak shows a maximum enhancement closer to the LSPR lambda(max) than that of a larger Raman shifted peak. This is in agreement with the predictions of the electromagnetic (EM) enhancement mechanism of SERS. Enhancement factors of up to approximately 10(8) are achieved, which is also in good agreement with our previous SERES studies.

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Metadata

Authors
McFarland, A. D., Young, M. A., Dieringer, J. A., & Van Duyne, R. P.
Venue
The Journal of Physical Chemistry B
Published
2005-05-14
Volume
109
Issue
22
Pages
11279-11285
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W1986836574
Cited by
959
References
19
FWCI
22.01
Type
journal article
Language
en
Open access
closed

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