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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Published inNanomaterials (Basel, Switzerland) Vol. 9; no. 11; p. 1588
Main Authors Barbillon, Grégory, Ivanov, Andrey, Sarychev, Andrey K
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 08.11.2019
MDPI
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
gold
sensors
silicon
SERS
plasmonics
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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.
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ISSN:2079-4991
2079-4991
DOI:10.3390/nano9111588