Journal article 254 views
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 / Liang Fang; Da-Meng Liu; Yuzheng Guo; Zhi-Min Liao; Jian-Bin Luo; Shi-Zhu Wen
Nanotechnology, Volume: 28, Issue: 24, Start page: 245703
Swansea University Author: Guo, Yuzheng
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DOI (Published version): 10.1088/1361-6528/aa712b
Abstract
Nanoscale friction on two-dimensional (2D) materials is closely associated with their mechanical, electronic and photonic properties, which can be modulated through changing thickness. Here, we investigated the thickness dependent friction on few-layer MoS2, WS2, and WSe2 using atomic force microsco...
| Published in: | Nanotechnology |
|---|---|
| ISSN: | 0957-4484 1361-6528 |
| Published: |
2017
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa34401 |
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| spelling |
2017-09-07T13:32:39Z v2 34401 2017-06-20 Thickness dependent friction on few-layer MoS2, WS2, and WSe2 Yuzheng Guo Yuzheng Guo true 0000-0003-2656-0340 false 2c285ab01f88f7ecb25a3aacabee52ea ca6eaec62d53427333c2fdd0967e29f3 yuiXDDPmSM3HuYmRdX7apxXCE6Z9OGBXOD9D5JU4+T4= 2017-06-20 EEN Nanoscale friction on two-dimensional (2D) materials is closely associated with their mechanical, electronic and photonic properties, which can be modulated through changing thickness. Here, we investigated the thickness dependent friction on few-layer MoS2, WS2, and WSe2 using atomic force microscope at ambient condition and found two different behavior. When a sharp tip was used, the regular behavior of decreasing friction with increasing thickness was reproduced. However, when a pre-worn and flat-ended tip was used, we observed an abnormal trend: on WS2 and WSe2, friction increased monotonically with thickness, while for MoS2, friction decreased from monolayer to bilayer and then subsequently increased with thickness. As suggested by the density functional theory calculation, we hypothesize that the overall frictional behavior is a competition between the puckering effect and the intrinsic energy corrugation within the compressive region. By varying the relative strength of the puckering effect via changing the tip shape, the dependence of friction on sample thickness can be tuned. Our results also suggest a potential means to measure intrinsic frictional properties of 2D materials with minimum impact from puckering. Journal article Nanotechnology 28 24 245703 0957-4484 1361-6528 puckering effect, thickness dependent friction, transition metal dichalcogenides 25 5 2017 2017-05-25 10.1088/1361-6528/aa712b College of Engineering Engineering CENG EEN None None 2017-09-07T13:32:39Z 2017-06-20T15:22:59Z College of Engineering Engineering Liang Fang 1 Da-Meng Liu 2 Yuzheng Guo 3 Zhi-Min Liao 4 Jian-Bin Luo 5 Shi-Zhu Wen 6 |
| title |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 |
| spellingShingle |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 Guo, Yuzheng |
| title_short |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 |
| title_full |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 |
| title_fullStr |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 |
| title_full_unstemmed |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 |
| title_sort |
Thickness dependent friction on few-layer MoS2, WS2, and WSe2 |
| author_id_str_mv |
2c285ab01f88f7ecb25a3aacabee52ea |
| author_id_fullname_str_mv |
2c285ab01f88f7ecb25a3aacabee52ea_***_Guo, Yuzheng |
| author |
Guo, Yuzheng |
| author2 |
Liang Fang Da-Meng Liu Yuzheng Guo Zhi-Min Liao Jian-Bin Luo Shi-Zhu Wen |
| format |
Journal article |
| container_title |
Nanotechnology |
| container_volume |
28 |
| container_issue |
24 |
| container_start_page |
245703 |
| publishDate |
2017 |
| institution |
Swansea University |
| issn |
0957-4484 1361-6528 |
| doi_str_mv |
10.1088/1361-6528/aa712b |
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College of Engineering |
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collegeofengineering |
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College of Engineering |
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collegeofengineering |
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College of Engineering |
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Engineering{{{_:::_}}}College of Engineering{{{_:::_}}}Engineering |
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| description |
Nanoscale friction on two-dimensional (2D) materials is closely associated with their mechanical, electronic and photonic properties, which can be modulated through changing thickness. Here, we investigated the thickness dependent friction on few-layer MoS2, WS2, and WSe2 using atomic force microscope at ambient condition and found two different behavior. When a sharp tip was used, the regular behavior of decreasing friction with increasing thickness was reproduced. However, when a pre-worn and flat-ended tip was used, we observed an abnormal trend: on WS2 and WSe2, friction increased monotonically with thickness, while for MoS2, friction decreased from monolayer to bilayer and then subsequently increased with thickness. As suggested by the density functional theory calculation, we hypothesize that the overall frictional behavior is a competition between the puckering effect and the intrinsic energy corrugation within the compressive region. By varying the relative strength of the puckering effect via changing the tip shape, the dependence of friction on sample thickness can be tuned. Our results also suggest a potential means to measure intrinsic frictional properties of 2D materials with minimum impact from puckering. |
| published_date |
2017-05-25T12:44:26Z |
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1631152103037599744 |
| score |
10.801898 |