Nanoscale frictional properties of ordered and disordered MoS2
Nanoscale frictional properties of ordered and disordered MoS2
The present work aims to understand the sliding of ordered/disordered molybdenum disulfide against itself by combination of nanoscale sliding experiments and atomistic simulations. Tribological experiments were performed using lateral force microscopy with tips covered by a thin sputtered MoS2film. Nanoscale contact area between the MoS2-coated tips and MoS2 samples opened up the possibility for close comparison with classical molecular dynamics simulations. Our simulations replicated well the coefficient of friction obtained by experiments for various contact conditions and shed light on nanoscale sliding of both crystalline and amorphous MoS2. Experimental sliding at humid environment demonstrated detrimental effect of water molecules on friction. However, such effect was much less pronounced when compared to that observed in macroscopic sliding experiments.
Atomic force microscopy, Friction, Molecular dynamics simulations, Molybdenum disulfide
67-74
Serpini, Elisabetta
42656309-da09-496d-92fe-d354de90697d
Rota, Alberto
c39dbbf3-bbc0-4d6e-974b-5c74b33aa6ac
Valeri, Sergio
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Ukraintsev, Egor
a36d4bbe-f72b-414d-bf12-c1f9df905678
Rezek, Bohuslav
d4a4a7a2-3291-4e39-bb9a-507badbd61bf
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Nicolini, Paolo
80726840-4adf-44ea-a1dd-a77f9cb1e72d
August 2019
Serpini, Elisabetta
42656309-da09-496d-92fe-d354de90697d
Rota, Alberto
c39dbbf3-bbc0-4d6e-974b-5c74b33aa6ac
Valeri, Sergio
9bd7a5dd-f732-4c18-b4a0-8c81ff04848a
Ukraintsev, Egor
a36d4bbe-f72b-414d-bf12-c1f9df905678
Rezek, Bohuslav
d4a4a7a2-3291-4e39-bb9a-507badbd61bf
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Nicolini, Paolo
80726840-4adf-44ea-a1dd-a77f9cb1e72d
Serpini, Elisabetta, Rota, Alberto, Valeri, Sergio, Ukraintsev, Egor, Rezek, Bohuslav, Polcar, Tomas and Nicolini, Paolo
(2019)
Nanoscale frictional properties of ordered and disordered MoS2.
Tribology International, 136, .
(doi:10.1016/j.triboint.2019.03.004).
Abstract
The present work aims to understand the sliding of ordered/disordered molybdenum disulfide against itself by combination of nanoscale sliding experiments and atomistic simulations. Tribological experiments were performed using lateral force microscopy with tips covered by a thin sputtered MoS2film. Nanoscale contact area between the MoS2-coated tips and MoS2 samples opened up the possibility for close comparison with classical molecular dynamics simulations. Our simulations replicated well the coefficient of friction obtained by experiments for various contact conditions and shed light on nanoscale sliding of both crystalline and amorphous MoS2. Experimental sliding at humid environment demonstrated detrimental effect of water molecules on friction. However, such effect was much less pronounced when compared to that observed in macroscopic sliding experiments.
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Published date: August 2019
Additional Information:
Funding Information:
This work was supported by the Center of Advanced Applied Sciences CZ.02.1.01/0.0/0.0/16_019/0000778 and by the project Novel nanostructures for engineering applications CZ.02.1.01/0.0/0.0/16_026/0008396 funded by the European Regional Development Fund (ERDF) and Ministry of Education, Youth and Sports of the Czech Republic . The work was also supported by Large Research Infrastructures: IT4Innovations National Supercomputing Center ( LM2015070 ) and LNSM ( LM2011026 ). We acknowledge PRACE for granting us access to the DECI resource Eagle based in Poland at PSNC with support from the PRACE aisbl. International collaboration on this work was also partly supported by the COST Action MP1303 “Understanding and Controlling Nano and Mesoscale Friction”. P.N. acknowledges support from the Czech Science Foundation , project 16-11516Y .
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
Keywords:
Atomic force microscopy, Friction, Molecular dynamics simulations, Molybdenum disulfide
Identifiers
Local EPrints ID: 456217
URI: http://eprints.soton.ac.uk/id/eprint/456217
ISSN: 0301-679X
PURE UUID: 9b34edc6-7afa-4e6d-bf46-7f5d012c4c18
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Date deposited: 26 Apr 2022 17:54
Last modified: 18 Mar 2024 03:19
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Contributors
Author:
Elisabetta Serpini
Author:
Alberto Rota
Author:
Sergio Valeri
Author:
Egor Ukraintsev
Author:
Bohuslav Rezek
Author:
Paolo Nicolini
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