Silver-coated PMMA nanoparticles-on-a-mirror substrates as high-performance SERS sensors for detecting infinitesimal molecules.

ABSTRACT: Surface-enhanced Raman scattering (SERS) technology has attracted more and more attention due to its high sensitivity, low water interference, and quick measurement. Constructing high-performance SERS substrates with high sensitivity, uniformity and reproducibility is of great importance to put the SERS technology into practical application. In this paper, we report a simple fabrication process to construct dense silver-coated PMMA nanoparticles-on-a-mirror SRES substrates. The electric field enhancement at the ultra-small metallic nanogap is further amplified by the silver mirror, which can achieve higher SERS intensity. The thickness of the PMMA layer was optimized so that the absorption peak can match the excitation wavelength, thus obtaining maximum SERS intensity. The optimized substr

SUBMITTER: Zeng P 

PROVIDER: S-EPMC11685381 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature