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

Nanomaterials

Grégory Barbillon¹  AndreyK. Sarychev²  Andrey Ivanov² 

[1] EPF-Ecole d’Ingénieurs, 3 bis rue Lakanal, 92330 Sceaux, France;Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, 125412 Moscow, Russia;

关键词: sers;    sensors;    plasmonics;    gold;    silicon;   

DOI  :  10.3390/nano9111588

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown