Atomistic Modelling of Frictional Anisotropy of Metal Nanoparticles on Graphene
KHOMENKO O.V., BIESIEDINA A.A., KHOMENKO K.P., TROFIMENKO P.E., and CHELNOKOV I.A.
Sumy State University, 116 Kharkivska Str., UA-40007 Sumy, Ukraine
Received 17.02.2025, Final version 30.04.2025
Download PDF
Abstract
The object of the research is the process of frictional interaction of surfaces with anisotropic roughness. This study aims to improve the model of frictional anisotropy of the aluminium, palladium, and platinum nanoparticles on graphene. The objective is to familiarise oneself with the standard models employed in atomic-level physics of friction and surface wear, utilising molecular-dynamics methods. Additionally, the aim is to develop a mathematical model that characterises the relationship between the friction force and the shear direction. The goal is to identify the structural, tribological, and kinetic patterns at both atomic scale and macroscopic one, when the aluminium, palladium, and platinum nanoparticles move on the surface of graphene under varying shear angles and temperature conditions. The study investigates the impact of friction on nanoparticles on a graphene sheet in various lateral directions using classical molecular-dynamics simulations. The study focuses on anisotropy at a high sliding speed of nanoparticles comprising 10000 atoms on the graphene surface. The lack of a distinct angular dependence of the friction force is attributed to the impact of incommensurability, the short-range order of the contact surfaces of nanoparticles, and the deformation of graphene. For a better understanding of the results, the work includes the dependences corresponding to the optimal numerical values of the parameters.
Keywords: molecular dynamics, friction force, graphene, nanoparticle, nanotribology.
DOI: https://doi.org/10.15407/ufm.26.02.***
Citation: O.V. Khomenko, A.A. Biesiedina, K.P. Khomenko, P.E. Trofimenko, and I.A. Chelnokov, Atomistic Modelling of Frictional Anisotropy of Metal Nanoparticles on Graphene, Progress in Physics of Metals, 26, No. 2: ***–*** (2025)