Quantitative evaluation of plasmon enhanced Raman scattering from nanoaperture arrays

Thomas H. Reilly; Shih Hui Chang; Jordan D. Corbman; George C Schatz; Kathy L. Rowlen

doi:10.1021/jp066802j

Quantitative evaluation of plasmon enhanced Raman scattering from nanoaperture arrays

Thomas H. Reilly, Shih Hui Chang, Jordan D. Corbman, George C Schatz, Kathy L. Rowlen^*

^*Corresponding author for this work

Chemistry

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

81 Scopus citations

Abstract

Nanoaperture arrays in a silver film were quantitatively evaluated, for the first time, to determine the absolute Raman scattering enhancement factors as a function of aperture lattice spacing using a nonresonant analyte. The arrays, with 200 nm diameter apertures and varying spacing in a 50 nm thick silver film, resulted in an average area-corrected SERS enhancement factor of (6 ± 3) × 10⁷ for 514.5 nm excitation. Comparison between theory and experiment provided critical insight into the magnitude and origin of enhancement in these nanoaperture arrays as a function of lattice spacing. The measured enhancement factor was attributed to two distinct sources: a factor of 10⁵ from nm scale roughness associated with the Ag film in the absence of the nanoapertures and a factor of 6 × 10² associated with plasmons localized near the aperture edges.

Original language	English (US)
Pages (from-to)	1689-1694
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	111
Issue number	4
DOIs	https://doi.org/10.1021/jp066802j
State	Published - Feb 1 2007

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Electronic, Optical and Magnetic Materials
Surfaces, Coatings and Films
General Energy

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title = "Quantitative evaluation of plasmon enhanced Raman scattering from nanoaperture arrays",

abstract = "Nanoaperture arrays in a silver film were quantitatively evaluated, for the first time, to determine the absolute Raman scattering enhancement factors as a function of aperture lattice spacing using a nonresonant analyte. The arrays, with 200 nm diameter apertures and varying spacing in a 50 nm thick silver film, resulted in an average area-corrected SERS enhancement factor of (6 ± 3) × 107 for 514.5 nm excitation. Comparison between theory and experiment provided critical insight into the magnitude and origin of enhancement in these nanoaperture arrays as a function of lattice spacing. The measured enhancement factor was attributed to two distinct sources: a factor of 105 from nm scale roughness associated with the Ag film in the absence of the nanoapertures and a factor of 6 × 102 associated with plasmons localized near the aperture edges.",

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T1 - Quantitative evaluation of plasmon enhanced Raman scattering from nanoaperture arrays

AU - Reilly, Thomas H.

AU - Chang, Shih Hui

AU - Corbman, Jordan D.

AU - Schatz, George C

AU - Rowlen, Kathy L.

PY - 2007/2/1

Y1 - 2007/2/1

N2 - Nanoaperture arrays in a silver film were quantitatively evaluated, for the first time, to determine the absolute Raman scattering enhancement factors as a function of aperture lattice spacing using a nonresonant analyte. The arrays, with 200 nm diameter apertures and varying spacing in a 50 nm thick silver film, resulted in an average area-corrected SERS enhancement factor of (6 ± 3) × 107 for 514.5 nm excitation. Comparison between theory and experiment provided critical insight into the magnitude and origin of enhancement in these nanoaperture arrays as a function of lattice spacing. The measured enhancement factor was attributed to two distinct sources: a factor of 105 from nm scale roughness associated with the Ag film in the absence of the nanoapertures and a factor of 6 × 102 associated with plasmons localized near the aperture edges.

AB - Nanoaperture arrays in a silver film were quantitatively evaluated, for the first time, to determine the absolute Raman scattering enhancement factors as a function of aperture lattice spacing using a nonresonant analyte. The arrays, with 200 nm diameter apertures and varying spacing in a 50 nm thick silver film, resulted in an average area-corrected SERS enhancement factor of (6 ± 3) × 107 for 514.5 nm excitation. Comparison between theory and experiment provided critical insight into the magnitude and origin of enhancement in these nanoaperture arrays as a function of lattice spacing. The measured enhancement factor was attributed to two distinct sources: a factor of 105 from nm scale roughness associated with the Ag film in the absence of the nanoapertures and a factor of 6 × 102 associated with plasmons localized near the aperture edges.

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Quantitative evaluation of plasmon enhanced Raman scattering from nanoaperture arrays

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