Superlubricity achieved for commensurate sliding: MoS2 frictional anisotropy in silico

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00331474" target="_blank" >RIV/68407700:21230/19:00331474 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.commatsci.2019.03.019" target="_blank" >https://doi.org/10.1016/j.commatsci.2019.03.019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.commatsci.2019.03.019" target="_blank" >10.1016/j.commatsci.2019.03.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Superlubricity achieved for commensurate sliding: MoS2 frictional anisotropy in silico

Popis výsledku v původním jazyce

In the past decades, MoS2 has received substantial attention from the tribology community due to its excellent frictional properties. However, a fundamental understanding of the mechanisms determining friction at the nanoscale is yet to be achieved. The general consensus is that one of the ingredients required for obtaining the superlubric regime when sliding layers of MoS2 atop each other is incommensurability. Herein, we report on a molecular dynamics study focused on studying the effects of the sliding direction on the frictional properties of commensurate MoS2. It is found that different types of dynamics are obtained with different sliding directions, with the stick-slip dynamics characterized by a highly dissipative behavior. Also, it is found that there is a relation linking the mismatch angle between the driving force and the actual trajectory and the load-dependence of the frictional force. We show, for the first time with a computational study, that incommensurability is not required for achieving the superlubric behavior of MoS2.

Název v anglickém jazyce

Superlubricity achieved for commensurate sliding: MoS2 frictional anisotropy in silico

Popis výsledku anglicky

In the past decades, MoS2 has received substantial attention from the tribology community due to its excellent frictional properties. However, a fundamental understanding of the mechanisms determining friction at the nanoscale is yet to be achieved. The general consensus is that one of the ingredients required for obtaining the superlubric regime when sliding layers of MoS2 atop each other is incommensurability. Herein, we report on a molecular dynamics study focused on studying the effects of the sliding direction on the frictional properties of commensurate MoS2. It is found that different types of dynamics are obtained with different sliding directions, with the stick-slip dynamics characterized by a highly dissipative behavior. Also, it is found that there is a relation linking the mismatch angle between the driving force and the actual trajectory and the load-dependence of the frictional force. We show, for the first time with a computational study, that incommensurability is not required for achieving the superlubric behavior of MoS2.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GJ16-11516Y" target="_blank" >GJ16-11516Y: Počítačové simulace effektů prostředí na tribologické chování dichalkogenidů přechodových kovů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Computational Materials Science

ISSN

0927-0256

e-ISSN

1879-0801

Svazek periodika

163

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

17-23

Kód UT WoS článku

000466367000003

EID výsledku v databázi Scopus

2-s2.0-85062840917