The Evolution of Nanoscale Third Body Layer Revealed by Graphite Structural Superlubric Contact

Revealing the evolution of nanoscale third bodies confined between sliding surfaces is essential to understanding the friction and electrical properties for solid contacts. Here, with graphite/graphite contacts in structural superlubricity, a state of no wear and ultralow friction, we reveal the mor...

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Published in:Nano letters 2024-12
Main Authors: He, Yuqing, Yu, Zhaokuan, Wang, Shuai, Wang, Jin, Feng, Weijia, Li, Zehao, Liu, Yuan, Liu, Yan, Ma, Ming
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container_title Nano letters
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creator He, Yuqing
Yu, Zhaokuan
Wang, Shuai
Wang, Jin
Feng, Weijia
Li, Zehao
Liu, Yuan
Liu, Yan
Ma, Ming
description Revealing the evolution of nanoscale third bodies confined between sliding surfaces is essential to understanding the friction and electrical properties for solid contacts. Here, with graphite/graphite contacts in structural superlubricity, a state of no wear and ultralow friction, we reveal the morphological evolution of a third body layer introduced by air through measuring friction and conductance during cyclic hold-slide tests. The directional transport of confined molecules causes apparent elastic deformation of the third body layer, leading to local graphite/graphite direct contact. Together with a proposed quantum tunneling effective thickness ( ) model, a constant volume of third bodies with a sub-nm thickness is observed. Our work provides a feasible approach to investigate the kinetics of substances under nanoscale confinement.
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title The Evolution of Nanoscale Third Body Layer Revealed by Graphite Structural Superlubric Contact
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