Fabrication and Application of Ag@SiO₂/Au Core-Shell SERS Composite in Detecting Cu²⁺ in Water Environment.

ABSTRACT: A sensitive and simple method for detecting Cu²⁺ in the water source was proposed by using surface-enhanced Raman scattering spectroscopy (SERS) based on the Ag@SiO₂/Au core-shell composite. The Ag@SiO₂ SERS tag was synthesized by a simple approach, in which Ag nanoparticles were first embedded with Raman reporter PATP and next coated with a SiO₂ shell. The Ag@SiO₂ nanoparticles had strong stability even in a high-concentration salty solution, and there were no changes to their properties and appearance within one month. The Ag@SiO₂/Au composite was fabricated through a controllable self-assemble process. L-cysteine was decorated on the surface of a functionalized Ag@SiO₂/Au composite, as the amino and carboxyl gr

SUBMITTER: Zhang M 

PROVIDER: S-EPMC11013303 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature