Interlayer friction behavior of molybdenum ditelluride with different structures

The interlayer friction behavior of two-dimensional transition metal dichalcogenides as crucial solid lubricants has attracted extensive attention in the field of tribology. In this study, the interlayer friction is measured by laterally pushing the MoTe2 powder on the MoTe2 substrate with the atomic force microscope tip, and density functional theory simulations are used to rationalize the experimental results. The experimental results indicate that the friction coefficient of the 1T'-MoTe2 /1T'-MoTe2 interface is 2.025 × 10-4, which is lower than that of the 2H-MoTe2 /2H-MoTe2 interface (3.086 × 10-4), while the friction coefficient of the 1T'-MoTe2 /2H-MoTe2 interface is the lowest at 6.875 × 10-5. The lower interfacial friction of 1T'-MoTe2/1T'-MoTe2 compared to 2H-MoTe2 /2H-MoTe2 interface can be explained by the relative magnitudes of the ideal average shear strengths and maximum shear strengths obtained based on the interlayer potential energy, while the smallest interlayer friction of the 1T'-MoTe2 /2H-MoTe2 heterojunction is related to the weak interlayer electrostatic interaction and the weakening of the potential energy corrugation caused by the incommensurate contact. This work suggests that MoTe2 has comparable interlayer friction properties to MoS2 and is expected to reduce interlayer friction in the future by inducing the 2H-1T' phase transition.

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成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

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