Study of Signal-to-Background Ratio of Surface-Enhanced Raman Scattering: Dependences on Excitation Wavelength and Hot-Spot Gap

Mykhaylo M. Dvoynenko; Huai Hsien Wang; Hui Hsin Hsiao; Yuh Lin Wang; Juen Kai Wang

doi:10.1021/acs.jpcc.7b08362

Study of Signal-to-Background Ratio of Surface-Enhanced Raman Scattering: Dependences on Excitation Wavelength and Hot-Spot Gap

Mykhaylo M. Dvoynenko, Huai Hsien Wang, Hui Hsin Hsiao, Yuh Lin Wang, Juen Kai Wang^*

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

Signal-to-background ratio of surface-enhanced Raman scattering (SERS) plays an important role in the analytic applications of SERS. Its dependences on excitation wavelength and gap between metal particles were studied theoretically and experimentally. We show that this ratio is higher at smaller gaps for the same excitation wavelength and is higher for the wavelengths having higher values of the absolute values of the dielectric function of the metal. This study thus results in design guidelines in the fabrication of SERS-active substrates with high signal-to-background ratio.

Original language	English
Pages (from-to)	26438-26445
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	121
Issue number	47
DOIs	https://doi.org/10.1021/acs.jpcc.7b08362
Publication status	Published - 2017 Nov 30
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.7b08362

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title = "Study of Signal-to-Background Ratio of Surface-Enhanced Raman Scattering: Dependences on Excitation Wavelength and Hot-Spot Gap",

abstract = "Signal-to-background ratio of surface-enhanced Raman scattering (SERS) plays an important role in the analytic applications of SERS. Its dependences on excitation wavelength and gap between metal particles were studied theoretically and experimentally. We show that this ratio is higher at smaller gaps for the same excitation wavelength and is higher for the wavelengths having higher values of the absolute values of the dielectric function of the metal. This study thus results in design guidelines in the fabrication of SERS-active substrates with high signal-to-background ratio.",

author = "Dvoynenko, {Mykhaylo M.} and Wang, {Huai Hsien} and Hsiao, {Hui Hsin} and Wang, {Yuh Lin} and Wang, {Juen Kai}",

note = "Funding Information: The authors acknowledge the financial support from the National Science Council and Academia Sinica in Taiwan. Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

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AU - Dvoynenko, Mykhaylo M.

AU - Wang, Huai Hsien

AU - Hsiao, Hui Hsin

AU - Wang, Yuh Lin

AU - Wang, Juen Kai

PY - 2017/11/30

Y1 - 2017/11/30

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AB - Signal-to-background ratio of surface-enhanced Raman scattering (SERS) plays an important role in the analytic applications of SERS. Its dependences on excitation wavelength and gap between metal particles were studied theoretically and experimentally. We show that this ratio is higher at smaller gaps for the same excitation wavelength and is higher for the wavelengths having higher values of the absolute values of the dielectric function of the metal. This study thus results in design guidelines in the fabrication of SERS-active substrates with high signal-to-background ratio.

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Study of Signal-to-Background Ratio of Surface-Enhanced Raman Scattering: Dependences on Excitation Wavelength and Hot-Spot Gap

Abstract

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