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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/9805


    Title: Frequency Shifts and Analysis of AFM Accompanying with Coupled Flexural-Torsional Motions
    Authors: 林水木
    Shueei-Muh Lin
    Wen-Rong Wang
    Contributor: 機械工程系
    Keywords: AFM
    Analytical model
    Coupled flexural–torsional motion
    Frequency shift
    Date: 2010-01-05
    Issue Date: 2010-04-22 16:41:33 (UTC+8)
    Abstract: In a conventional dynamic atomic force microscopy (AFM), observing the flexural characteristics of a
    cantilever subjected to the tip–sample interaction is for extracting the topography and the material
    properties of a sample’s surface. Recently, Sahin et al. (2007) found that it is essential for understanding
    surface properties to design a cantilever with an eccentric tip and observe its coupled flexural–torsional
    characteristics. For effectively analyzing the flexural and torsional signals simultaneously, one has to find
    out the mode of a cantilever that the ratio of the tip gradient of flexural deformation and the tip torsional
    angle is comparable. Moreover, the development of an analytical model that can accurately simulate the
    surface-coupled dynamics of the cantilever is important for quantitative and qualitative understanding of
    measured results. In this paper, an analytical model of a cantilever with an eccentric tip and subjected to
    a nonlinear tip–sample force is established. The analytical solution is derived. It is found that the first two
    modes are the flexural motion and the third mode is the coupled flexural–torsional motion. Finally, the
    influences of several parameters on the tip angle ratio and frequency shift are investigated.
    Relation: International Journal of Solids and Structures 46 (2009) 4231–4241
    Appears in Collections:[機械工程系所] 期刊論文

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