Next Article in Journal
Morphology and Kinetics Evolution of Nanoscale Phase in Fe–Cr Alloys under External Strain
Previous Article in Journal
NiS2@MoS2 Nanospheres Anchored on Reduced Graphene Oxide: A Novel Ternary Heterostructure with Enhanced Electromagnetic Absorption Property
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Nanomaterials 2019, 9(2), 293; https://doi.org/10.3390/nano9020293

Comparison of Frictional Properties of CVD-Grown MoS2 and Graphene Films under Dry Sliding Conditions

1
Department of Mechatronics Engineering, Gyeongnam National University of Science and Technology, 33, Dongjin-ro, Jinju-si, Gyeongsangnam-do 52725, Korea
2
SKKU Advanced Institute of Nanotechnology, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi 16419, Korea
3
Korea University of Science & Technology (UST), Nanomechatronics, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
4
Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea
5
School of Mechanical Engineering, Sungkyunkwan University, 2066 Seobu-ro., Jangan-gu, Suwon, Gyeonggi 16419, Korea
6
Fuel and Emission System R&D Center, Korea Automotive Technology Institute, 303 Pungse-ro, Pungse-myeon, Dongnam-gu, Cheonan, Chungnam 31214, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Received: 8 January 2019 / Revised: 14 February 2019 / Accepted: 15 February 2019 / Published: 19 February 2019
  |  
PDF [8296 KB, uploaded 21 February 2019]
  |  

Abstract

In the present study, dry friction and wear properties of atomically thin CVD-grown graphene and MoS2 films on SiO2/Si substrates were compared at low (72 MPa) and high (378 MPa) contact pressures. Analysis of atomic force microscopy images of these films verified that the MoS2 films, which were directly grown on the SiO2/Si substrates, had clean surfaces and made conformal contacts with the substrates. In contrast, the graphene film showed many contaminants on its surface and was loosely bonded with its SiO2/Si substrate due to its wet transfer from a Cu foil to the substrate. The MoS2 film exhibited friction and wear properties superior to those of the graphene film both at low and high contact pressures. We found that the clean sliding surface and strong bonding with SiO2/Si were the main causes of the superiority of the MoS2 film compared to the graphene film. Mild wear occurred in a layer-by-layer fashion at low contact pressure for the MoS2 film. At high contact pressure, severe wear occurred due to failure at the boundary between the MoS2 films and the underlying substrates. At both contact pressures, friction did not increase immediately after the removal of the MoS2 film from the SiO2/Si substrate because the film transferred onto the counter sliding surface and served as a lubricant. View Full-Text
Keywords: friction; wear; MoS2; graphene; Chemical Vapor Deposition friction; wear; MoS2; graphene; Chemical Vapor Deposition
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Cho, D.-H.; Jung, J.; Kim, C.; Lee, J.; Oh, S.-D.; Kim, K.-S.; Lee, C. Comparison of Frictional Properties of CVD-Grown MoS2 and Graphene Films under Dry Sliding Conditions. Nanomaterials 2019, 9, 293.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Nanomaterials EISSN 2079-4991 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top