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Experimental study and modeling of atomic-scale friction in zigzag and armchair lattice orientations of MoS2
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第一作者: Li M(李萌);Shi JL(施佳林);Liu LQ(刘连庆);Yu P(于鹏);Wang YC(王越超)
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发表年度: 2016
期: 1
卷: 17
页: 189-199
摘要: Physical properties of two-dimensional materials, such as graphene, black phosphorus, molybdenum disulfide (MoS2) and tungsten disulfide, exhibit significant dependence on their lattice orientations, especially for zigzag and armchair lattice orientations. Understanding of the atomic probe motion on surfaces with different orientations helps in the study of anisotropic materials. Unfortunately, there is no comprehensive model that can describe the probe motion mechanism. In this paper, we report a tribological study of MoS2 in zigzag and armchair orientations. We observed a characteristic power spectrum and friction force values. To explain our results, we developed a modified, two-dimensional, stick-slip Tomlinson model that allows simulation of the probe motion on MoS2 surfaces by combining the motion in the Mo layer and S layer. Our model fits well with the experimental data and provides a theoretical basis for tribological studies of two-dimensional materials.
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刊物名称: SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
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