Investigation of a New SERS Platform Based on Silver Nanoparticles/Pyramid Silicon

Abstract

A novel and efficient surface enhanced Raman scattering (SERS) substrate is proposed and investigated based on Silver nanoparticles/pyramid silicon (Ag NPs/PSi) in this paper. The electric field enhancement effect on varying geometric parameters of nanoparticles and incident light wavelength is theoretically analyzed by COMSOL and the optimized parameters are obtained. The result shows that the electric field enhancement effect of Ag NPs/PSi is superior to the Si platform, Si pyramid and Ag NPs/Si and the ð¸ð¹of Ag NPs/PSi can reach up to 9 orders of magnitude. The Gold wrapped Silver nanoparticles/pyramid silicon (Au@Ag NPs/PSi) is also studied. Although the ð¸ð¹ of Au@Ag NPs/PSi is slightly weaker than Ag NPs/PSi, the stability of Au@Ag NPs/PSi is superior to the Ag NPs/PSi. In addition, a possible fabrication protocol for Ag NPs/PSi is discussed. The results suggest that the Ag NPs/PSi is expected to offer a novel way to accelerate the development of SERS technology.