Plasmonic Enhanced SERS in Ag/TiO2 Nanostructured Film: An Experimental and Theoretical Study

In this work, we present a new study on the electromagnetic (EM) enhancement properties generated by Ag/TiO2 toward the finger print of methylene blue (MB) molecules deposited on the surface of Ag nanostructures. SERS intensity generated by MB molecules reflects the interaction between the local electric field and their bonds. A power-dependent SERS study in order to reveal the magnitude effect of a local electric field on the vibration behavior of molecular bonds of MB was performed. A theoretical study using finite element (COMSOL Multiphysics) was performed in order to understand the effect of interparticle distance of Ag nanoparticles on the enhancement properties.

Automated summary

This study investigates the electromagnetic enhancement properties of Ag/TiO2 nanostructures towards methylene blue molecules using a combination of experimental and theoretical approaches. The results show that the local electric field affects the vibration behavior of molecular bonds, and the interparticle distance of Ag nanoparticles plays a role in the enhancement properties.