Plasma-Tunable Metasurfaces for SERS Nanosensing of Hazardous Chemicals.

ABSTRACT: The demand for rapid, field-deployable detection of hazardous substances has intensified the search for plasmonic sensors with both high sensitivity and fabrication simplicity. Conventional approaches to plasmonic substrates, however, often rely on lithographic precision or complex chemistries limiting scalability and reproducibility. Here, a facile, one-step synthesis of vertically aligned 2D nanosheets composed of intergrown Cu₂O/CuO crystallites is presented, fabricated via oxygen plasma discharge on copper substrates. Decorated with a discontinuous Ag nanoparticle layer, the substrates serve as high-performance plasmonic metasurface exhibiting nanomolar sensitivity of explosive molecules, with detection limits as low as 4-5 nm for tetryl and 2-3 nm for HMX under 488 nm excit

SUBMITTER: Shvalya V 

PROVIDER: S-EPMC12508722 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature