Cargando…

Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations

Lateral-force microscopy is a powerful tool to study the frictional properties of two-dimensional materials. However, few works distinctly reveal the correlation between the tip radius with the tip–sample distance and the frictional properties of the two-dimensional (2D) materials. We performed mole...

Descripción completa

Detalles Bibliográficos
Autores principales: Pang, Haosheng, Li, Minglin, Gao, Chenghui, Lai, Lianfeng, Zhuo, Weirong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027478/
https://www.ncbi.nlm.nih.gov/pubmed/29857522
http://dx.doi.org/10.3390/nano8060387
_version_ 1783336621197754368
author Pang, Haosheng
Li, Minglin
Gao, Chenghui
Lai, Lianfeng
Zhuo, Weirong
author_facet Pang, Haosheng
Li, Minglin
Gao, Chenghui
Lai, Lianfeng
Zhuo, Weirong
author_sort Pang, Haosheng
collection PubMed
description Lateral-force microscopy is a powerful tool to study the frictional properties of two-dimensional materials. However, few works distinctly reveal the correlation between the tip radius with the tip–sample distance and the frictional properties of the two-dimensional (2D) materials. We performed molecular-dynamics simulations to study the atomic-scale friction of a typical two-dimensional single-layer molybdenum disulfide (SLMoS(2)). The effects of tip radius and tip–sample distance on the frictional properties were analyzed and discussed. The frictional force–sliding-distance curves show typical stick–slip behaviors, and the periodicity can be used to characterize the lattice constants of SLMoS(2). Sub-nanoscale stick-slip movements occur in one-lattice sliding periods along with only the armchair (AC) direction and only when the tip radius is smaller than 3 Å with 1.47 Å tip-sample distance. At the same tip–sample distance, a smaller tip can provide a more detailed characterization and higher-precision frictional properties of SLMoS(2). A larger tip is capable of providing comparative frictional properties of SLMoS(2) at a proper vertical tip–sample distance, compared with the small tip.
format Online
Article
Text
id pubmed-6027478
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-60274782018-07-13 Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations Pang, Haosheng Li, Minglin Gao, Chenghui Lai, Lianfeng Zhuo, Weirong Nanomaterials (Basel) Article Lateral-force microscopy is a powerful tool to study the frictional properties of two-dimensional materials. However, few works distinctly reveal the correlation between the tip radius with the tip–sample distance and the frictional properties of the two-dimensional (2D) materials. We performed molecular-dynamics simulations to study the atomic-scale friction of a typical two-dimensional single-layer molybdenum disulfide (SLMoS(2)). The effects of tip radius and tip–sample distance on the frictional properties were analyzed and discussed. The frictional force–sliding-distance curves show typical stick–slip behaviors, and the periodicity can be used to characterize the lattice constants of SLMoS(2). Sub-nanoscale stick-slip movements occur in one-lattice sliding periods along with only the armchair (AC) direction and only when the tip radius is smaller than 3 Å with 1.47 Å tip-sample distance. At the same tip–sample distance, a smaller tip can provide a more detailed characterization and higher-precision frictional properties of SLMoS(2). A larger tip is capable of providing comparative frictional properties of SLMoS(2) at a proper vertical tip–sample distance, compared with the small tip. MDPI 2018-05-31 /pmc/articles/PMC6027478/ /pubmed/29857522 http://dx.doi.org/10.3390/nano8060387 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pang, Haosheng
Li, Minglin
Gao, Chenghui
Lai, Lianfeng
Zhuo, Weirong
Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations
title Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations
title_full Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations
title_fullStr Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations
title_full_unstemmed Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations
title_short Characterization of Frictional Properties of Single-Layer Molybdenum-Disulfide Film Based on a Coupling of Tip Radius and Tip–Sample Distance by Molecular-Dynamics Simulations
title_sort characterization of frictional properties of single-layer molybdenum-disulfide film based on a coupling of tip radius and tip–sample distance by molecular-dynamics simulations
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6027478/
https://www.ncbi.nlm.nih.gov/pubmed/29857522
http://dx.doi.org/10.3390/nano8060387
work_keys_str_mv AT panghaosheng characterizationoffrictionalpropertiesofsinglelayermolybdenumdisulfidefilmbasedonacouplingoftipradiusandtipsampledistancebymoleculardynamicssimulations
AT liminglin characterizationoffrictionalpropertiesofsinglelayermolybdenumdisulfidefilmbasedonacouplingoftipradiusandtipsampledistancebymoleculardynamicssimulations
AT gaochenghui characterizationoffrictionalpropertiesofsinglelayermolybdenumdisulfidefilmbasedonacouplingoftipradiusandtipsampledistancebymoleculardynamicssimulations
AT lailianfeng characterizationoffrictionalpropertiesofsinglelayermolybdenumdisulfidefilmbasedonacouplingoftipradiusandtipsampledistancebymoleculardynamicssimulations
AT zhuoweirong characterizationoffrictionalpropertiesofsinglelayermolybdenumdisulfidefilmbasedonacouplingoftipradiusandtipsampledistancebymoleculardynamicssimulations