Premium
One‐Step Photochemical Green Synthesis of Water‐Dispersible Ag, Au, and Au@Ag Core–Shell Nanoparticles
Author(s) -
PerezLloret Marta,
Fraix Aurore,
Petralia Salvatore,
Conoci Sabrina,
Tafani Virginie,
Cutrone Giovanna,
VargasBerenguel Antonio,
Gref Ruxandra,
Sortino Salvatore
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201903076
Subject(s) - nanoparticle , shell (structure) , core (optical fiber) , materials science , chemical engineering , photochemistry , nanotechnology , chemistry , composite material , engineering
A simple and green synthetic protocol for the rapid and effective preparation of Ag, Au and Au@Ag core–shell nanoparticles (NPs) is reported based on the light irradiation of a biocompatible, water‐soluble dextran functionalized with benzophenone (BP) in the presence of AgNO 3 , HAuCl 4 , or both. Photoactivation of the BP moiety produces the highly reducing ketyl radicals through fast (<50 ns) intramolecular H‐abstraction from the dextran scaffold, which, in turn, ensures excellent dispersibility of the obtained metal NPs in water. The antibacterial activity of the AgNPs and the photothermal action of the Au@Ag core–shell are also shown.