Coupling Au-loaded magnetic frameworks to photonic crystal for the improvement of photothermal heating effect in SERS.

ABSTRACT: The combination of plasmonic metals and photonic crystal (PC) structure is considered to have potential for further enhancement of the surface-enhanced Raman scattering (SERS) effect in comparison with conventional metal SERS substrates. Many studies have suggested that SERS signals probably suffer from an often-neglected effect of strong surface plasmon resonance (SPR)-induced photothermal heating during SERS detection. Herein, we have discovered that the photothermal heating problem arises in a traditional hybrid substrate that is prepared by doping plasmonic Au nanoparticles (NPs) into the voids of an opal PC (Au-PC). This happens mainly because excess Au agglomerates formed by non-uniformly distributed Au NPs can cause a strong SPR effect under laser illumination. To fully address this

SUBMITTER: Wang T 

PROVIDER: S-EPMC9907568 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature