Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain.
Sci Rep. 2020 Nov 3;10(1):18911. doi: 10.1038/s41598-020-75785-0.
In this work, the tip convolution effect in atomic force microscopy is revisited to illustrate the capabilities of cubic objects for determination of the tip shape and size. Using molecular-based cubic nanoparticles as a reference, a two-step tip reconstruction process has been developed. First, the tip-to-face angle is estimated by means of an analysis of the convolution error while the tip radius is extracted from the experimental profiles. The results obtained are in good agreement with specification of the tip supplier even though the experiments have been conducted using real distribution of nanoparticles with dispersion in size and aspect ratio. This demonstrates the reliability of our method and opens the door for a more accurate tip reconstruction by using calibration standards.
在这项工作中，我们重新审视了原子力显微镜中的尖端卷积效应，以说明立方物体在确定尖端形状和尺寸方面的能力。我们使用基于分子的立方纳米粒子作为参考，开发了一种两步尖端重建过程。首先，通过分析卷积误差来估计尖端与表面的夹角，同时从实验轮廓中提取尖端半径。即使实验是使用具有尺寸和纵横比分布的真实纳米粒子进行的，我们得到的结果也与尖端供应商的规格非常吻合。这证明了我们方法的可靠性，并为使用校准标准进行更精确的尖端重建开辟了道路。
