Surface-Enhanced Raman Scattering in Au Nanostructures with Submolecular Gaps for Molecular Size Detection.

ABSTRACT: Nanostructures for surface-enhanced Raman scattering (SERS) are widely studied to enhance the intensity of Raman-scattered light. The main stream of SERS substrate design is smaller nanogaps; however, there has been limited investigation of the nanostructures that cause a reduction in Raman scattering intensity. This study presents a systematic approach for molecular characterization using the intensity reduction in Au-based nanostructures with nanometer-order gaps. The nanostructures were fabricated by sputtering on glass substrates, and their gap sizes were evaluated using resistive spectroscopy. When 4-mercaptobenzoic acid molecules were attached to the nanostructures, an intensity reduction was observed when the gaps were extremely small, nearly in contact with each other. Experimental

SUBMITTER: Nakamura N 

PROVIDER: S-EPMC12750203 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature