Femtosecond laser patterned silicon embedded with gold nanostars as a hybrid SERS substrate for pesticide detection† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2ra07859g

ABSTRACT: We have developed simple and cost-effective surface-enhanced Raman scattering (SERS) substrates for the trace detection of pesticide (thiram and thiabendazole) and dye (methylene blue and Nile blue) molecules. Surface patterns (micro/nanostructures) on silicon (Si) substrates were fabricated using the technique of femtosecond (fs) laser ablation in ambient air. Different surface patterns were achieved by tuning the number of laser pulses per unit area (4200, 8400, 42 000, and 84 000 pulses per mm2) on Si. Subsequently, chemically synthesized gold (Au) nanostars were embedded in these laser-patterned areas of Si to achieve a plasmonic active hybrid SERS substrate. Further, the SERS performance of the as-prepared Au nanostar embedded Si substrates were tested with different probe molecules.

SUBMITTER: Moram S 

PROVIDER: S-EPMC9844677 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature