Friction at the homogenous and heterogenous interfaces of penta–graphene and B2N4

Friction at the homogenous and heterogenous interfaces of penta–graphene and B2N4

This study is to examine the effectiveness of the two ways forming the incommensurate contacts on reducing friction. Two dimensional (2D) penta–graphene (PG) and B2N4 possessing the same lattice structure and excellent lubricating property were chosen to construct the homogenous and heterogenous int...

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Bibliographic Details
Main Authors: Lu Chen, Yicheng Lai, Zhiheng Ma, Hao Wang, Tengfei Cao, Junqin Shi, Feng Zhou, Weimin Liu, Xiaoli Fan
Format: Article
Language:English
Published: Tsinghua University Press 2025-07-01
Series:Friction
Subjects:
structural superlubricity
incommensurate contacting
interface stretching and twisting
penta–graphene
molecular dynamics simulation
Online Access:https://www.sciopen.com/article/10.26599/FRICT.2025.9441008
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Summary:This study is to examine the effectiveness of the two ways forming the incommensurate contacts on reducing friction. Two dimensional (2D) penta–graphene (PG) and B2N4 possessing the same lattice structure and excellent lubricating property were chosen to construct the homogenous and heterogenous interfaces. We studied the frictional properties at the homogenous interfaces of PG/PG and B2N4/B2N4, and the heterogenous interface of B2N4/PG. Our calculations show that the friction coefficients at the homogenous interface of B2N4/B2N4 are smaller than those at the heterogenous interface of B2N4/PG. The different compositional elements at the commensurate contacting surfaces hardly reduce the interlayer friction. It indicates the ineffectiveness of heterogenous interface on reducing friction when it is commensurate contacting. Additionally, the incommensurate contact formed via biaxial stretching one layer can significantly reduce the interlayer friction, which is the superposition of uniaxial stretching. In addition, the interlayer friction was elucidated from the point views of potential energy, charge density difference, and registry index (RI). This study highlights the importance and effectiveness of twisting in reducing the interlayer friction compared to stretching.
ISSN:2223-7690
2223-7704

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