RT journal article
T1 Synthesis and Structural Characterization of Branched Bimetallic AuPd Nanoparticles with a Highly Tunable Optical Response
A1 Nuti, S.
A1 Fernández-Lodeiro, A.
A1 Chinchilla Reyes, Lidia Esther
A1 Hungría Hernández, Ana Belén
A1 Capelo-Martinez, J.-L.
A1 Lodeiro, C.
A1 Fernández-Lodeiro, J.
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
AB Bimetallic nanostructures composed of gold (Au) and palladium (Pd) havegarnered increased interest for their applications in heterogeneous catalysis. This study reportsa simple strategy for manufacturing Au@Pd bimetallic branched nanoparticles (NPs), whichoffer a tunable optical response, using polyallylamine-stabilized branched AuNPs as templatecores for Pd overgrowth. The palladium content can be altered by manipulating theconcentration of PdCl42− and ascorbic acid (AA) that are injected, which permit anovergrowth of the Pd shell up to ca. 2 nm thick. The homogeneous distribution of Pd at thesurfaces of Au NPs can be carried out regardless of their size or branching degree, whichallows for an adjustment of the plasmon response in the near-infrared (NIR) spectral range.As a proof of concept, the nanoenzymatic activity of pure gold and gold−palladium NPs wascompared, exploring their peroxidase-like activity in the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The bimetallic AuPd NPs demonstrate an increase in the catalyticproperties attributed to the presence of palladium at the surface of gold.
PB ACS Publications
SN 1948-7185
YR 2023
FD 2023
LK http://hdl.handle.net/10498/31463
UL http://hdl.handle.net/10498/31463
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026