Payton O D, Picco L, Champneys A R, Homer M E, Miles M J, Raman A
H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom.
Rev Sci Instrum. 2011 Apr;82(4):043704. doi: 10.1063/1.3575321.
We report the use of a laser Doppler vibrometer to measure the motion of an atomic force microscope contact mode cantilever during continuous line scans of a mica surface. With a sufficiently high density of measurement points the dynamics of the entire cantilever beam, from the apex to the base, can be reconstructed. We demonstrate nanosecond resolution of both rectangular and triangular cantilevers. This technique permits visualization and quantitative measurements of both the normal and lateral tip sample interactions for the first and higher order eigenmodes. The ability to derive quantitative lateral force measurements is of interest to the field of microtribology/nanotribology while the comprehensive understanding of the cantilever's dynamics also aids new cantilever designs and simulations.
我们报告了使用激光多普勒振动计来测量原子力显微镜接触模式悬臂在云母表面连续线扫描过程中的运动。通过足够高的测量点密度，可以重建整个悬臂梁从顶端到基部的动力学。我们展示了矩形和三角形悬臂的纳秒级分辨率。该技术允许对一阶和高阶本征模式下的法向和横向针尖-样品相互作用进行可视化和定量测量。获得定量横向力测量值的能力对微摩擦学/纳米摩擦学领域具有重要意义，同时对悬臂动力学的全面理解也有助于新的悬臂设计和模拟。
