Surface Enhanced Raman Spectroscopy(SERS) of TMPyP on Ag Nanoparticles

This work was aimed to study the role of interaction between silver nanoparticles, TMPyP and Graphen Oxide(GO) on surface enhanced Raman scattering (SERS) signals. Silver nanoparticles(AgNPs) prepared by chemical reduction of AgNO3. SERS substrates show remarkable difference in spectral features due to the different enhancement contributions from the local chemical groups. Closely spaced NPs result in the enhancement of electromagnetic coupling between NPs leading to strong confinement of local electric field leading to large SERS enhancement. Graphene Oxide/TMPyP interaction nanostructures forming a composite with strong interaction, this came with identical results obtained in NanoPhotonics Research Group in UCD1. Depending on the quantum mechanics, this indicates match the energy levels between the reactants and increase the free electrons in the outer shells which enhances the surface plasmons signal.