journal article·2024-08-23

Wide-Range Thickness Dependent Friction Behavior in 2D CuInP2S6–In4/3P2S6 Nanosheets: Implications for Tribology Applications

Lei Wang, Dawei Zhang, Zheng-Dong Luo, Jianbo Tang, Pankaj Sharma, Jan Seidel

ACS Applied Nano Materials· Volume 7· Issue 16
Publisher page

Abstract

Friction has been recognized and studied for a long time due to its fundamental significance in the processes of human manufacturing and production. However, friction behavior at the nanoscale sometimes violates the conventional classical friction theory. Thickness-dependent friction behavior has been reported in nonpolar van der Waals materials but only within the few-layer range. Here, we report a wide thickness range of thickness-dependent friction behavior in functional van der Waals copper-deficient CuInP 2 S 6 (Cu 0.2 In 1.26 P 2 S 6 ), which exhibits spontaneous phase separation of ferroelectric and paraelectric phases. The friction gradually decreases with the increase of the thickness within the range of 20–230 nm. A higher adhesion force and phononic damping collectively contribute to higher friction in thinner nanoflakes.
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Research context

OpenAlex topics: Force Microscopy Techniques and Applications · Adhesion, Friction, and Surface Interactions · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, UNSW Sydney, Sydney, New South Wales 2052, Australia

ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), UNSW Sydney, Sydney, New South Wales 2052, Australia

Hangzhou Institute of Technology, Xidian University, Hangzhou 311200, China

State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi’an 710071, P. R. China

School of Chemical Engineering, UNSW Sydney, Sydney, New South Wales 2052, Australia

College of Science and Engineering, Flinders University, Bedford Park, Adelaide, South Australia 5042, Australia

Flinders Institute for Nanoscale Science and Technology, Flinders University, Adelaide, South Australia 5042, Australia

Funding

Flinders University · National Key Research and Development Program of China · Ningbo Municipal Bureau of Science and Technology · Centre of Excellence in Future Low-Energy Electronics Technologies, Australian Research Council · Australian Research Council · Australian Government · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province

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