High-Temperature Superlubricity in MoS2/Graphene van der Waals Heterostructures

被引：16

作者：

Long, Yuyang ^{[1
]}

Wang, Xiao ^{[1
]}

Tan, Wang ^{[1
]}

Li, Baowen ^{[1
]}

Li, Jidong ^{[2
]}

Deng, Wei ^{[2
]}

Li, Xuemei ^{[1
,3
]}

Guo, Wanlin ^{[1
,2
]}

Yin, Jun ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Aerosp Struct, Key Lab Intelligent Nano Mat & Devices, Minist Educ, Nanjing 210016, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Inst Frontier Sci, Nanjing 210016, Peoples R China

[3] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China

来源：

NANO LETTERS | 2024年 / 24卷 / 25期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

superlubricity; van derWaals heterostructure; high temperature; atomicforce microscope; CALIBRATION;

D O I：

10.1021/acs.nanolett.4c00542

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Achieving high-temperature superlubricity is essential for modern extreme tribosystems. Solid lubrication is the sole viable alternative due to the degradation of liquid ones but currently suffers from notable wear, instability, and high friction coefficient. Here, we report robust superlubricity in MoS2/graphene van der Waals heterostructures at high temperatures up to similar to 850 K, achieved through localized heating to enable reliable friction testing. The ultralow friction of the MoS2/graphene heterostructure is found to be notably further reduced at elevated temperature and dominantly contributed by the MoS2 edge. The observation can be well described by a multi-contact model, wherein the thermally activated rupture of edge-contacts facilitates the sliding. Our results should be applicable to other van der Waals heterostructures and shed light on their applications for superlubricity at elevated temperature.

引用

页码：7572 / 7577

页数：6

共 32 条

[1] Raman characterization of defects and dopants in graphene [J].