Synthesis of Ag@AgAu Metal Core/Alloy Shell Bimetallic Nanoparticles with Tunable Shell Compositions by a Galvanic Replacement Reaction

Abstract

Truncated octahedral (TO) Ag nanoparticles are subjected to a replacement reaction with HAuCl4, where they undergo a series of morphological changes to transform into Ag@AgAu metal core/alloy shell nanoparticles (see image). In the final stage, atomic rearrangement occurrs to restore the bimetallic particles to the initial TO shape.

Engineering the architectural diversity of heterogeneous metallic nanocrystals

“…2iii). The electrons released from the galvanic replacement reaction then accumulate preferentially on certain NC sites [25][26][27][28][29] . In this way, a spatially heterogeneous electron distribution is created, which can be used to direct the deposition of satellite NCs on electron-rich sites.…”

Anti-CD30-targeted gold nanoparticles for photothermal therapy of L-428 Hodgkin's cell

“…The absorption peak of gold nanorods, nanoshells, and nanocages are all in the NIR region. Some recent studies have focused on in vitro and in vivo photothermal cancer treatments; [30][31][32][33][34][35][36] however, the optimization of gold nanoparticle-based therapy techniques to physiological environments needs further study, to determine the clinical success of gold nanostructure-based nanomedicine. 19,37,38 …”

Facile fabrication of nickel nanostructures on a copper-based template via a galvanic replacement reaction in a deep eutectic solvent

“…[1][2][3] In general, a sacrificial metal substrate can be treated as a reactive template with a suitable metal salt, whose redox potential should be higher than that of the template material. 4,5 Compared to electrodeposition and electroless processes, galvanic replacement approach is easier to operate and control, since no additional substances, such as additives, reducing agents, complexants, buffers, and accelerators are involved.…”