Hybrid Metal-Dielectric-Metal Sandwiches for SERS Applications.

ABSTRACT: The development of efficient plasmonic nanostructures with controlled and reproducible surface-enhanced Raman spectroscopy (SERS) signals is an important task for the evolution of ultrasensitive sensor-related methods. One of the methods to improving the characteristics of nanostructures is the development of hybrid structures that include several types of materials. Here, we experimentally investigate ultrathin gold films (3-9 nm) near the percolation threshold on Si/Au/SiO2 and Si/Au/SiO2/graphene multilayer structures. The occurring field enhanced (FE) effects were characterized by a recording of SERS signal from Crystal Violet dye. In this geometry, the overall FE principally benefits from the combination of two mechanisms. The first one is associated with plasmon excitation in Au clus

SUBMITTER: Tatmyshevskiy MK 

PROVIDER: S-EPMC8708964 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature