Open AccessNoble metal modified ReS2 nanocavity for surface-enhanced Raman spectroscopy (SERS) analysis
Author(s) -
Mingrui Shao,
Chao Zhang,
Jing Yu,
Shouzhen Jiang,
Xiaofei Zhao,
Zhaoxiang Li,
Weixi Lu,
Baoyuan Man,
Zhen Li
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.435627
Subject(s) - materials science , plasmon , raman scattering , surface plasmon resonance , raman spectroscopy , silicon , surface enhanced raman spectroscopy , noble metal , metal , malachite green , spectroscopy , nanotechnology , optoelectronics , optics , nanoparticle , adsorption , chemistry , physics , organic chemistry , quantum mechanics , metallurgy
The rhenium disulphide (ReS 2 ) nanocavity-based surface enhanced Raman scattering (SERS) substrates ware fabricated on the gold-modified silicon pyramid (PSi) by thermal evaporation technology and hydrothermal method. In this work, the ReS 2 nanocavity was firstly combined with metal nanostructures in order to improve the SERS properties of ReS 2 materials, and the SERS response of the composite structure exhibits excellent performance in sensitivity, uniformity and repeatability. Numerical simulation reveals the synergistic effect of the ReS 2 nanocavity and the plasmon resonance generated by the metal nanostructures. And the charge transfer between the metal, ReS 2 and the analytes was also verified and plays an non-ignorable role. Besides, the plasmon-driven reaction for p-nitrothiophenol (PNTP) to p,p'-dimercaptobenzene (DMAB) conversion was successfully in-situ monitored. Most importantly, it is found for the first time that the SERS properties of ReS 2 nanocavity-based substrates are strongly temperature dependent, and the SERS effect achieves the best performance at 45 °C. In addition, the low concentration detection of malachite green (MG) and crystal violet (CV) molecules in lake water shows its development potential in practical application.