Liquid-Phase Friction of Two-Dimensional Molybdenum Disulfide at the Atomic Scale

Deliang Zhang, Mingzheng Huang, Lasse Hyldgaard Klausen, Qiang Li*, Suzhi Li*, Mingdong Dong*

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Abstract

Tribological properties depend strongly on environmental conditions such as temperature, humidity, and operation liquid. However, the origin of the liquid effect on friction remains largely unexplored. Herein, taking molybdenum disulfide (MoS2) as a model system, we explored the nanoscale friction of MoS2 in polar (water) and nonpolar (dodecane) liquids through friction force microscopy. The friction force exhibits a similar layer-dependent behavior in liquids as in air; i.e., thinner samples have a larger friction force. Interestingly, friction is significantly influenced by the polarity of the liquid, and it is larger in polar water than in nonpolar dodecane. Atomically resolved friction images together with atomistic simulations reveal that the polarity of the liquid has a substantial effect on friction behavior, where liquid molecule arrangement and hydrogen-bond formation lead to a higher resistance in polar water in comparison to that in nonpolar dodecane. This work provides insights into the friction on two-dimensional layered materials in liquids and holds great promise for future low-friction technologies.

OriginalsprogEngelsk
TidsskriftACS Applied Materials & Interfaces
Vol/bind15
Nummer17
Sider (fra-til)21595-21601
Antal sider7
ISSN1944-8244
DOI
StatusUdgivet - maj 2023

Fingeraftryk

Dyk ned i forskningsemnerne om 'Liquid-Phase Friction of Two-Dimensional Molybdenum Disulfide at the Atomic Scale'. Sammen danner de et unikt fingeraftryk.

Citationsformater