Stacking stability and sliding mechanism in weakly bonded 2D transition metal carbides by van der Waals force

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F17%3A10237789" target="_blank" >RIV/61989100:27740/17:10237789 - isvavai.cz</a>
Result on the web
<a href="http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C7RA11139H#!divAbstract" target="_blank" >http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C7RA11139H#!divAbstract</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c7ra11139h" target="_blank" >10.1039/c7ra11139h</a>

Result language
angličtina
Original language name
Stacking stability and sliding mechanism in weakly bonded 2D transition metal carbides by van der Waals force
Original language description
The stability of the stacked two-dimensional (2D) transition metal carbides and their interlayered friction in different configurations are comparatively studied by means of density functional theory (DFT). At equilibrium, a larger interlayer distance corresponds to a smaller binding energy, suggesting an easier sliding between them. The oxygen-functionalized M2CO2 possesses much lower sliding resistance than the bare ones due to the strong metallic interactions between the stacked M2C layers. Compared to the parallel stacking order of M2CO2-I, the mirror stacked M2CO2-II possesses better lubricant properties. At strained states, normal compression substantially enhances the sliding barrier owing to more charges transferring from the M to O atom. Furthermore, the in-plane biaxial strain may effectively hinder the interlayer sliding, while the uniaxial strain fundamentally modifies the preferred sliding pathway due to anisotropic expansion of surface electronic state. These results highlight that the functionalized MXenes with strain-controllable frictional properties are promising lubricating materials because of their low sliding energy barrier and excellent mechanical properties.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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