Monodisperse Icosahedral Ag, Au, and Pd Nanoparticles: Size Control Strategy and Superlattice Formation

Abstract

This paper reports the synthesis and self-assembly of monodisperse icosahedral Ag, Au, and Pd nanoparticles with tunable sizes. Ag nanoparticles were first prepared by a modified polyol method. The as-synthesized Ag nanoparticles were all icosahedral multiply twinned particles (MTPs) with notable size variations. The variability was reduced to less than 5% after a digestive ripening post treatment. The nearly monodisperse Ag nanoparticles were then used in replacement reactions with Au and Pd precursors to produce monodisperse icosahedral Au and Pd nanoparticles. The size of the monodisperse icosahedral Ag, Au, and Pd nanoparticles could also be increased thereafter by seed-mediated growth. The closely matched geometrical attributes of these icosahedral nanoparticles allowed them to easily self-assemble into 3-D superlattices either in the solution phase or on a solid substrate.

Kinetic Monte Carlo approach to Schottky defects in noble metal nanoclusters

“…More recently, work on gold nanoclusters has resulted in atomic structure (icosahedral, decahedral, and fcc) control of isomers during the formation processes [16]. Also tunable size control of gold, silver, and palladium icosahedral clusters has been reported [17]. Silver icosahedral and decahedral clusters have been synthesized in a chemical procedure [18].…”

Elucidating the real-time Ag nanoparticle growth on α-Ag2WO4during electron beam irradiation: experimental evidence and theoretical insights

“…2,16 A wide variety of metal nanoparticles with different morphologies have also been synthesized and characterized by electron microscopy. [17][18][19][20][21][22][23][24][25] Some reviews of these syntheses and related processes involving electron energy loss experiments have been published. 26,27 In these studies an electron beam is used for structural and morphological characterization, and can be used to carry out dynamic in situ experiments.…”

Features of Formation and Growth of the Nedle-Like Microscrystals in the Silver Electrodeposition Process

“…Их можно получить различными способами, такими как: термическое раз-ложение технически чистого серебра в атмосфере инертного газа [8][9][10], синтез частиц из растворов [11][12][13] …”