Pb²⁺ Ion Sensors Employing Gold Etching Process: Comparative Investigation on Au Nanorods and Au Nanotriangles.

ABSTRACT: The leaching phenomenon of gold (Au) nanomaterials by Pb²⁺ ions in the presence of 2-mercaptoethanol (2-ME) and thiosulfate (S₂O₃^2- ion) has been systematically applied to a Pb²⁺ ion sensor. To further investigate the role of Pb²⁺ ions in sensors containing Au nanomaterials, we revisited the leaching conditions for Au nanorods and compared them with the results for Au nanotriangles. By monitoring the etching rate, it was revealed that Pb²⁺ ions were important for the acceleration of the etching rate mainly driven by 2-ME and S₂O₃^2- pairs, and nanomolar detection of Pb²⁺ ions were shown to be promoted through this catalytic effect. Using the etchant, the overall size of t

SUBMITTER: Park EJ 

PROVIDER: S-EPMC10820728 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature