激发频率对攻丝模式原子力显微镜相衬的影响

Yu Zeng, Guolin Liu, Jinhao Liu, Zheng Wei
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引用次数: 0

摘要

原子力显微镜有多种成像模式,其中攻丝模式是最常用的扫描模式。攻丝模式可以获取样品表面的高度信息和相位信息,其中相位信息的价值更高,可以反映样品表面的物理性质。为了理解原子力显微镜的相位成像机理,本文利用振动理论推导出相位的理论表达式,发现激励频率会直接影响相位对比度。在此基础上,本文通过理论和实验分析发现,在扫描过程中存在一个能使相位对比度最大化的最佳激励频率。这些结果对于解读原子力显微镜的相位图像,从而优化实验中的相位成像非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of excitation frequencies on phase contrast in tapping mode atomic force microscope
There are several imaging modes in AFM, and the tapping mode is the most commonly used scanning mode. Tapping mode can acquire the height information and phase information of the sample surface, among which the phase information has more value, which can reflect the physical properties of the sample surface. In order to understand the phase imaging mechanism of AFM, this paper uses the vibration theory to derive the theoretical expression of phase, and finds that the excitation frequency will directly affect the phase contrast. Based on this, this paper finds, through theoretical and experimental analysis, that there exists an optimal excitation frequency that maximizes the phase contrast during the scanning process. These results are important for interpreting the phase image of AFM and thus optimizing the phase imaging in experiments.
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