Novel H₂S sensing mechanism derived from the formation of oligomeric sulfide capping the surface of gold nanourchins.

ABSTRACT: A gold nanourchin (AuNU) probe with a novel sensing mechanism for monitoring H₂S was developed as a feasible colorimetric sensor. In this study, AuNUs that are selectively responsive to H₂S were fabricated in the presence of trisodium citrate and 1,4-hydroquinone using a seed-mediated approach. Upon exposure of the AuNU solution to H₂S, the hydrosulfide ions (HS^-) in the solution are converted into oligomeric sulfides by 1,4-hydroquinone used as a reducing agent during the synthesis of AuNUs. The oligomeric sulfides formed in the AuNU solution upon the addition of H₂S were found to coat the surface of the AuNUs, introducing a blue shift in absorption accompanied by a color change in the solution from sky blue to light green. This color

SUBMITTER: Park H 

PROVIDER: S-EPMC10631460 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature