Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals
Friction anisotropy is one of the important friction behaviors for two-dimensional (2D) van der Waals (vdW) crystals. The effects of normal pressure and thickness on the interfacial friction anisotropy in few-layer graphene, <i>h</i>-BN, and MoSe<sub>2</sub> under constant no...
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MDPI AG
2021-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/16/4717 |
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| author | Kaibo Wang Hao Li Yufeng Guo |
| author_facet | Kaibo Wang Hao Li Yufeng Guo |
| author_sort | Kaibo Wang |
| collection | DOAJ |
| description | Friction anisotropy is one of the important friction behaviors for two-dimensional (2D) van der Waals (vdW) crystals. The effects of normal pressure and thickness on the interfacial friction anisotropy in few-layer graphene, <i>h</i>-BN, and MoSe<sub>2</sub> under constant normal force mode have been extensively investigated by first-principle calculations. The increase of normal pressure and layer number enhances the interfacial friction anisotropy for graphene and <i>h</i>-BN but weakens that for MoSe<sub>2</sub>. Such significant deviations in the interfacial friction anisotropy of few-layer graphene, <i>h</i>-BN and MoSe<sub>2</sub> can be mainly attributed to the opposite contributions of electron kinetic energies and electrostatic energies to the sliding energy barriers and different interlayer charge exchanges. Our results deepen the understanding of the influence of external loading and thickness on the friction properties of 2D vdW crystals. |
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| id | doaj.art-1add3917839d4b42a3aecd0468f8bab3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:37:47Z |
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| spelling | doaj.art-1add3917839d4b42a3aecd0468f8bab32023-11-22T08:31:49ZengMDPI AGMaterials1996-19442021-08-011416471710.3390/ma14164717Interfacial Friction Anisotropy in Few-Layer Van der Waals CrystalsKaibo Wang0Hao Li1Yufeng Guo2State Key Laboratory of Mechanics and Control of Mechanical Structures and MOE Key Laboratory for Intelligent Nano Materials and Devices, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures and MOE Key Laboratory for Intelligent Nano Materials and Devices, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures and MOE Key Laboratory for Intelligent Nano Materials and Devices, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaFriction anisotropy is one of the important friction behaviors for two-dimensional (2D) van der Waals (vdW) crystals. The effects of normal pressure and thickness on the interfacial friction anisotropy in few-layer graphene, <i>h</i>-BN, and MoSe<sub>2</sub> under constant normal force mode have been extensively investigated by first-principle calculations. The increase of normal pressure and layer number enhances the interfacial friction anisotropy for graphene and <i>h</i>-BN but weakens that for MoSe<sub>2</sub>. Such significant deviations in the interfacial friction anisotropy of few-layer graphene, <i>h</i>-BN and MoSe<sub>2</sub> can be mainly attributed to the opposite contributions of electron kinetic energies and electrostatic energies to the sliding energy barriers and different interlayer charge exchanges. Our results deepen the understanding of the influence of external loading and thickness on the friction properties of 2D vdW crystals.https://www.mdpi.com/1996-1944/14/16/4717two-dimensional crystalsfriction anisotropypressurethicknessfirst-principles calculations |
| spellingShingle | Kaibo Wang Hao Li Yufeng Guo Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals Materials two-dimensional crystals friction anisotropy pressure thickness first-principles calculations |
| title | Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals |
| title_full | Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals |
| title_fullStr | Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals |
| title_full_unstemmed | Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals |
| title_short | Interfacial Friction Anisotropy in Few-Layer Van der Waals Crystals |
| title_sort | interfacial friction anisotropy in few layer van der waals crystals |
| topic | two-dimensional crystals friction anisotropy pressure thickness first-principles calculations |
| url | https://www.mdpi.com/1996-1944/14/16/4717 |
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