Polyethyleneimine-assisted formation of Ag-SiO₂ hybrid microspheres for H₂O₂ sensing and SERS applications.

ABSTRACT: Herein, we report a simple, cost-effective, and eco-friendly approach for producing polyethyleneimine (PEI)-assisted silver nanoparticle-supported silica microspheres through evaporation-induced assembly (EIA). The silica-PEI microspheres obtained through EIA consisted of highly trapped PEI molecules owing to their electrosorption onto oppositely charged silica colloids. The trapped PEI molecules in the microspheres played a crucial role in linking silver ions to form silver ion-PEI complexes, which were then reduced to form silver nanoparticles. Further, the complex interactions between PEI and silica colloids led to enhanced porosity in the microspheres, enabling the efficient adsorption of Ag ions. The characterization of the Ag-SiO₂ microspheres was carried out using various

SUBMITTER: Mehta S 

PROVIDER: S-EPMC10548522 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature