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首页> 外文期刊>Arabian Journal for Science and Engineering >Dynamic Modeling of Nanoparticle Pushing Based on V-Shape Cantilevered AFM
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Dynamic Modeling of Nanoparticle Pushing Based on V-Shape Cantilevered AFM

机译：基于V型悬臂AFM的纳米粒子推进动力学模型

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摘要

In this paper, dynamics of pushing process based on V-shape cantilevered atomic force microscopy (VSC-AFM) is studied and the effect of VSC-AFM on required force and time of nanoparticle manipulation is discussed. The VSC is proved to be the most popular design, and the present model offers a more accurate estimation of nanoparticle displacement in pushing based on VSC-AFM. The proposed model takes both adhesion and normal friction forces into account. Pull-off forces are modeled using the Johnson-Kendall-Roberts model. Cantilever forces are modeled using various proposed stiffness models including Butt, Sader, and Neu-meister and Ducker (ND) equations for normal stiffness K_z, and Hazel, ND equations for torsional stiffness Kg, and lateral stiffness K_y by Sader et al. Results of simulations show that the assumption of parallel beam approximation theory is not accurate enough and therefore, it is not suitable for estimation of VSC stiffness in manipulation purposes. Moreover, in nanoparticle pushing based on VSC-AFM, the required pushing force is decreased in comparison with the obtained values based on rectangular cantilevered AFM (RC-AFM). The nanoparticle begins to move very soon with a VSC-AFM in comparison with a practically similar RC-AFM. Furthermore, as a comparison between torsional stiffness equations, ND and Hazel equations are examined. It is observed that Hazel equation are overestimated the torsional stiffness in comparison with ND.
机译：本文研究了基于V形悬臂原子力显微镜（VSC-AFM）的推动过程动力学，并讨论了VSC-AFM对纳米颗粒操纵所需的力和时间的影响。事实证明，VSC是最受欢迎的设计，本模型基于VSC-AFM提供了更精确的推挤中纳米颗粒位移的估计。所提出的模型考虑了粘附力和法向摩擦力。使用Johnson-Kendall-Roberts模型对拉力进行建模。悬臂力使用各种建议的刚度模型建模，包括Buter，Sader和Neu-meister和Ducker（ND）方程用于法向刚度K_z，Hazel ND方程用于抗扭刚度Kg和侧向刚度K_y。仿真结果表明，平行梁近似理论的假设不够准确，因此不适合用于操纵目的VSC刚度的估算。此外，在基于VSC-AFM的纳米颗粒推动中，与基于矩形悬臂AFM（RC-AFM）获得的值相比，所需的推动力降低了。与实际上类似的RC-AFM相比，VSC-AFM很快使纳米颗粒开始移动。此外，作为扭转刚度方程之间的比较，研究了ND和Hazel方程。可以发现，与ND相比，Hazel方程高估了扭转刚度。

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