Hybrid Au/Si Disk-Shaped Nanoresonators on Gold Film for Amplified SERS Chemical Sensing

We present here the amplification of the surface-enhanced Raman scattering (SERS) signal of nanodisks on a gold film for SERS sensing of small molecules (thiophenol) with an excellent sensitivity. The enhancement is achieved by adding a silicon underlayer for the composition of the nanodisks. We exp...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2019-11, Vol.9 (11), p.1588
Main Authors: Barbillon, Grégory, Ivanov, Andrey, Sarychev, Andrey K
Format: Article
Language:English
Subjects:
Amplification
Chemical perception
Chemoreception
Electric fields
Ethanol
Gold
Lasers
Magnetic fields
Nanoparticles
Nanowires
plasmonics
Raman spectra
Sensitivity enhancement
sensors
sers
Silicon
Spectrum analysis
Thiophenol
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Summary:We present here the amplification of the surface-enhanced Raman scattering (SERS) signal of nanodisks on a gold film for SERS sensing of small molecules (thiophenol) with an excellent sensitivity. The enhancement is achieved by adding a silicon underlayer for the composition of the nanodisks. We experimentally investigated the sensitivity of the suggested Au/Si disk-shaped nanoresonators for chemical sensing by SERS. We achieved values of enhancement factors of 5 × 10 7 - 6 × 10 7 for thiophenol sensing. Moreover, we remarked that the enhancement factor (EF) values reached experimentally behave qualitatively as those evaluated with the E 4 model.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano9111588