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首页> 外文期刊>Japanese journal of applied physics >Improving the atomic-resolution AFM imaging of monolayer MoS_2 for worn tips: a molecular dynamics study
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Improving the atomic-resolution AFM imaging of monolayer MoS_2 for worn tips: a molecular dynamics study

机译：改进单层MoS_2的原子分辨率AFM成像以解决磨损的尖端：分子动力学研究

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摘要

In this paper, molecular dynamics simulations were performed to investigate the atomic-scale imaging of a typical two-dimensional monolayer: molybdenum disulfide (MoS2). With a constant height mode, force-displacement curves of tips along a straight-line scanning path indicate resonant waveforms and the periodicities are capable of characterizing lattice parameters of monolayer MoS2. Some characteristic sites in the forcedisplacement curves arise only for tips with a radius of less than 3 A under 1.47 A tip-sample distance, which correlated to the atoms next to the scanning path. Such characteristic sites can be reproduced by using tips with a radius of 7 A via increasing the tip-sample distance. The underlying mechanism was illustrated by the number of interactive atoms between the tip and the sample. The work may shed light on the atomic force microscope (AFM) operation when one expects to achieve high-resolution AFM imaging of 2D materials with a worn AFM tip. (c) 2019 The Japan Society of Applied Physics
机译：在本文中，进行了分子动力学模拟以研究典型的二维单层：二硫化钼（MoS2）的原子级成像。在恒定高度模式下，尖端沿直线扫描路径的力-位移曲线指示共振波形，并且周期性能够表征单层MoS2的晶格参数。力-位移曲线中的某些特征点仅在半径小于1.47 A的尖端采样距离下小于3 A的尖端出现，该尖端与靠近扫描路径的原子相关。通过使用尖端半径为7 A的尖端，可以通过增大尖端采样距离来复制此类特征部位。尖端和样品之间的相互作用原子数说明了其潜在机理。当人们希望用磨损的AFM尖端实现2D材料的高分辨率AFM成像时，这项工作可能会为原子力显微镜（AFM）的操作提供启发。 （c）2019日本应用物理学会

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  • 来源
    《Japanese journal of applied physics》 |2019年第5期|055003.1-055003.8|共8页
  • 作者

    Li Minglin; Zhuo Weirong; Pang Haosheng; Lai Lianfeng;

  • 作者单位

    Fuzhou Univ Sch Mech Engn & Automat Fuzhou 350116 Fujian Peoples R China|Fujian Key Lab Med Instrumentat & Pharmaceut Tech Fuzhou 350108 Fujian Peoples R China|Fuzhou Univ Inst Tribol Fuzhou 350116 Fujian Peoples R China;

    Fuzhou Univ Sch Mech Engn & Automat Fuzhou 350116 Fujian Peoples R China;

    Ningde Normal Univ Coll Informat & Mech & Elect Engn Ningde 352100 Peoples R China|Fuzhou Univ Inst Tribol Fuzhou 350116 Fujian Peoples R China;

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