TiO₂ compact layer induced charge transfer enhancement in a three-dimensional TiO₂-Ag array SERS substrate for quantitative and multiplex analysis.

ABSTRACT: A highly sensitive and uniform surface-enhanced Raman scattering (SERS) substrate is the guarantee for reliable quantitative analysis. Herein, a three-dimensional TiO₂-Ag SERS substrate was prepared by growing a TiO₂ nanorods (NRs) array on a TiO₂ compact layer (c-TiO₂), followed by modification with Ag nanoparticles (AgNPs). The synergy between the c-TiO₂, semiconductor TiO₂ NRs and the plasmonic AgNPs collaboratively endowed it with high sensitivity, in which c-TiO₂ effectively blocked the recombination of electrons and holes, and the charge transfer enhancement contributed 10-fold improvement over that without the c-TiO₂ substrate. Besides the high sensitivity, the TiO₂-Ag hybrid array SER

SUBMITTER: Ding Z 

PROVIDER: S-EPMC10012413 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature