In recent studies of two-dimensional(2D)nanomaterial-based solid lubricants,the importance of durability has been emerging for real engineering-scale applications.To achieve this,a transfer layer formation is essentia...In recent studies of two-dimensional(2D)nanomaterial-based solid lubricants,the importance of durability has been emerging for real engineering-scale applications.To achieve this,a transfer layer formation is essential to prevent the wear of the mechanical systems.However,it has been challenging for pristine graphene(PG)to induce a material transfer due to chemical inertness.In this study,we suggest an easy-to-process strategy to promote the huge material transfer of the PG onto the counterpart contacting material.We utilized graphene oxide(GO)as a gluing layer between the PG film and the counterpart contact surface to realize the superior tribological performance.The high interaction energy of the GO from its functional groups makes a contribution to the material transfer of PG,which is unveiled by a systematic analysis of the counterpart contact surface and the wear track.The huge solid transfer layer not only makes a wear-resistant contact interface between the transfer layer and the underlying film by densification and oxidation,but also reduces surface interaction energies,finally resulting in a significant improvement in durability.展开更多
基金supported by the National Research Foundation of Korea(NRF)Global Basic Research Laboratory grant funded by the Korea government(MSIT)(No.RS-2025-02216195)by the Korea Institute of Energy Technology Evaluation and Planning(KETEP)grant funded by the Korea government(MOTIE)(No.20214000000140).
文摘In recent studies of two-dimensional(2D)nanomaterial-based solid lubricants,the importance of durability has been emerging for real engineering-scale applications.To achieve this,a transfer layer formation is essential to prevent the wear of the mechanical systems.However,it has been challenging for pristine graphene(PG)to induce a material transfer due to chemical inertness.In this study,we suggest an easy-to-process strategy to promote the huge material transfer of the PG onto the counterpart contacting material.We utilized graphene oxide(GO)as a gluing layer between the PG film and the counterpart contact surface to realize the superior tribological performance.The high interaction energy of the GO from its functional groups makes a contribution to the material transfer of PG,which is unveiled by a systematic analysis of the counterpart contact surface and the wear track.The huge solid transfer layer not only makes a wear-resistant contact interface between the transfer layer and the underlying film by densification and oxidation,but also reduces surface interaction energies,finally resulting in a significant improvement in durability.
