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Friction 2022, 10(12): 2033-2044 https://doi.org/10.1007/s40544-021-0570-9
Research Article | Open Access | Issue | Published: 23 April 2022

Nanotribology of SiP nanosheets: Effect of thickness and sliding velocity

Show Author's Information Zishuai WU1,2,†,  Tongtong YU2,3,†,  Wei WU1,  Jianxi LIU1,  Zhinan ZHANG4,  Daoai WANG2,3( ),  Weimin LIU1,2
Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Qingdao Center of Resource Chemistry and New Materials, Qingdao 266100, China
State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China

† Zishuai WU and Tongtong YU contributed equally to this work.

Keywords:
nanotribology, atomic force microscopy (AFM), 2D material, SiP nanosheet
Cite this article:
WU Z, YU T, WU W, et al. Nanotribology of SiP nanosheets: Effect of thickness and sliding velocity. Friction, 2022, 10(12): 2033-2044. https://doi.org/10.1007/s40544-021-0570-9
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Abstract Full text Electronic supplementary material About this article

Two-dimensional compounds combining group IV A element and group V A element were determined to integrate the advantages of the two groups. As a typical 2D group IV–V material, SiP has been widely used in photodetection and photocatalysis due to its high carrier mobility, appropriate bandgap, high thermal stability, and low interlayer cleavage energy. However, its adhesion and friction properties have not been extensively grasped. Here, large-size and high-quality SiP crystals were obtained by using the flux method. SiP nanosheets were prepared by using mechanical exfoliation. The layer-dependent and velocity-dependent nanotribological properties of SiP nanosheets were systematically investigated. The results indicate the friction force of SiP nanosheets decreases with the increase in layer number and reaches saturation after five layers. The coefficient of friction of multilayer SiP is 0.018. The mean friction force, frictional vibrations, and the friction strengthening effect can be affected by sliding velocity. Specially, the mean friction force increases with the logarithm of sliding velocity at nm/s scale, which is dominated by atomic stick-slip. The influence of frequency on frictional vibration is greater than speed due to the different influences on the change in contact quality. The friction strengthening saturation distance increases with the increase in speed for thick SiP nanosheets. These results provide an approach for manipulating the nanofriction properties of SiP and serve as a theoretical basis for the application of SiP in solid lubrication and microelectromechanical systems.


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About this article

Nanotribology of SiP nanosheets: Effect of thickness and sliding velocity

Show Author's information Zishuai WU1,2,†, Tongtong YU2,3,†, Wei WU1, Jianxi LIU1, Zhinan ZHANG4, Daoai WANG2,3( ), Weimin LIU1,2
Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Qingdao Center of Resource Chemistry and New Materials, Qingdao 266100, China
State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China

† Zishuai WU and Tongtong YU contributed equally to this work.

Abstract

Two-dimensional compounds combining group IV A element and group V A element were determined to integrate the advantages of the two groups. As a typical 2D group IV–V material, SiP has been widely used in photodetection and photocatalysis due to its high carrier mobility, appropriate bandgap, high thermal stability, and low interlayer cleavage energy. However, its adhesion and friction properties have not been extensively grasped. Here, large-size and high-quality SiP crystals were obtained by using the flux method. SiP nanosheets were prepared by using mechanical exfoliation. The layer-dependent and velocity-dependent nanotribological properties of SiP nanosheets were systematically investigated. The results indicate the friction force of SiP nanosheets decreases with the increase in layer number and reaches saturation after five layers. The coefficient of friction of multilayer SiP is 0.018. The mean friction force, frictional vibrations, and the friction strengthening effect can be affected by sliding velocity. Specially, the mean friction force increases with the logarithm of sliding velocity at nm/s scale, which is dominated by atomic stick-slip. The influence of frequency on frictional vibration is greater than speed due to the different influences on the change in contact quality. The friction strengthening saturation distance increases with the increase in speed for thick SiP nanosheets. These results provide an approach for manipulating the nanofriction properties of SiP and serve as a theoretical basis for the application of SiP in solid lubrication and microelectromechanical systems.

Keywords: nanotribology, atomic force microscopy (AFM), 2D material, SiP nanosheet

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Publication history

Received: 24 August 2021
Revised: 19 October 2021
Accepted: 02 November 2021
Published: 23 April 2022
Issue date: December 2022

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© The author(s) 2021.

Acknowledgements

Thanks for the financial support of the Program for Taishan Scholars of Shandong Province (No. ts20190965), the National Key R&D Program of China (No. 2020YFF0304600), the National Natural Science Foundation of China (No. 51905518), the Key Research Program of the Chinese Academy of Sciences (No. XDPB24) and the Innovation Leading Talents Program of Qingdao (No. 19-3-2-23-zhc) in China.

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