Issue 33, 2024

Coalescence of AuPd nanoalloys in implicit environments

Abstract

The optimal design of nanoparticles and nanoalloys arises from the control of their morphology which depends on the synthesis process they undergo. Coalescence is widely accepted as one of the most common synthetic mechanisms, and it occurs both in the liquid and gas phases. Coalescence is when two existing seeds collide and aggregate into a larger object. The resulting aggregate is expected to be far from the equilibrium isomer, i.e. the global minimum of the potential energy surface. While the coalescence of nanoparticles is well studied in a vacuum, sparse computational studies are available for the coalescence in an environment. Using molecular dynamics simulations, we study the coalescence of Au and Pd nanoseeds surrounded by an interacting environment. Comparing the initial stages of the coalescence in a vacuum and the presence of an interacting environment, we show that the formation kinetics strongly depends on the environment and on the size of the nanoalloy. Furthermore, we show that it is possible to tune the resulting nanoalloys’ surface chemical composition by changing their surrounding environment.

Graphical abstract: Coalescence of AuPd nanoalloys in implicit environments

Supplementary files

Article information

Article type
Paper
Submitted
01 Mar 2024
Accepted
14 Jun 2024
First published
18 Jun 2024
This article is Open Access
Creative Commons BY-NC license

Phys. Chem. Chem. Phys., 2024,26, 21965-21973

Coalescence of AuPd nanoalloys in implicit environments

S. Zinzani and F. Baletto, Phys. Chem. Chem. Phys., 2024, 26, 21965 DOI: 10.1039/D4CP00916A

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