Superlubricity in bilayer isomeric tellurene and graphene/tellurene van der Waals heterostructures
| Autor: | Weihong Qi, Guoliang Ru, Yaru Wei, Kewei Tang, Taowen Xue |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Graphene Mechanical Engineering Bilayer Superlubricity Stacking Heterojunction 02 engineering and technology Surfaces and Interfaces Slip (materials science) Tribology 021001 nanoscience & nanotechnology Surfaces Coatings and Films law.invention Molecular dynamics 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials law 0210 nano-technology |
| Zdroj: | Tribology International. 159:106974 |
| ISSN: | 0301-679X |
| DOI: | 10.1016/j.triboint.2021.106974 |
| Popis: | The molecular dynamics (MD) method was used to study the superlubricity in two-dimensional tellurene isomers (α-Te/β-Te), and in two-dimensional tellurene and graphene (G/α-Te, G/β-Te) heterostructures. We find that their friction characteristics are completely different. The α-Te/β-Te system increases the incommensurate contact between layers by torsion, however, the superlubricity phenomenon cannot occur. The friction coefficient of stacking G/β-Te changes slightly under different stacking structures, but varies obviously with sliding direction, sliding speed and normal load. For the G/α-Te system, the results show that one can obtain superlubricity in a wide range of interlayer angle. Moreover, the superlubricity in G/α-Te is almost invariant with the slip direction, the slip speed and the normal load, indicating that it is a new superlubricity system with potential applications. The present study extends the superlubricity system and helps to understand the tribology properties in the two-dimensional materials. |
| Databáze: | OpenAIRE |
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