arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.4567cond-mat.mtrl-sci
收藏

基于AFM的原子结构可视化:理论描述

Visualization of atomic structure using AFM: theoretical description

M. O. Gallyamov, I. V. Yaminsky

摘要:

提出了原子力显微镜(AFM)成像的简单模型,该模型考虑了扫描过程中探针与样品的接触变形。该模型解释了当探针-样品接触面积大于表面晶格中每个原子或分子的面积时,AFM观察规则原子或分子结构的可能性。(This通常是当要研究的晶格具有亚纳米晶胞参数并且AFM研究在空气中以接触模式进行时的情况)。在这种条件下,二维点阵AFM可视化可以观察到两个特殊的特点:1)AFM图像对比度的反转; 2)在所研究的表面单原子空位下,可以观察到“假原子”。

英文摘要:

We suggest simple model of image formation in atomic force microscope (AFM) taking into account contact deformations of probe and sample during scanning. The model explains the possibility of AFM visualization of regular atomic or molecular structure when probe-sample contact area is greater than an area per atom or molecule in surface lattice. (This is usually the case when lattice to be studied has subnanometer unit cell parameters and AFM investigations are carried out in air in contact mode). Two special peculiarities of AFM visualization of two-dimensional lattice could be observed under such conditions: 1) the inversion of contrast of AFM images, and 2) visualization of "false atom" under single atomic vacancy of surface studied.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑