An Improved Method Of Adhesion Force Measurement By Atomic Force Microscopy (AFM)

IF 3.4 2区 化学 Q1 SPECTROSCOPY
Xiongyao Li
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引用次数: 0

Abstract

The adhesion properties of lunar dust grains are a key to determine its motion state. Atomic force microscopy (AFM) is conducted to evaluate the adhesion properties of such ultrasmall grains. However, effective method to measure the adhesion properties of lunar grains has not yet been developed because of the difficulties in eliminating the effect of adsorption of water and gases on the grain surface. In this study, an improved method was proposed to measure the adhesion force of grains while effectively eliminating the gas molecule adsorption effect. In the proposed method, using a focused ion beam, a small grain was mounted onto the tip of an AFM probe and used to measure the adhesion force of the grain. To determine the effects of environmental pressure and temperature, the adhesion force between a silica ball and a silica wafer was measured under different conditions. Based on the results, the gas molecule adsorption effect can be effectively eliminated during adhesion force measurement through AFM at a temperature of 200 °C and an environmental pressure of <2.4 ×10 Pa, at which strong adhesion of the grain is achieved. The proposed method is suitable for the measurement of adhesion force in lunar grain samples.
一种改进的原子力显微镜(AFM)附着力测量方法
月球尘埃颗粒的粘附特性是决定其运动状态的关键。采用原子力显微镜(AFM)对这种超细颗粒的粘附性能进行了评价。然而,由于难以消除水和气体在月球颗粒表面吸附的影响,目前还没有有效的方法来测量月球颗粒的粘附性能。在本研究中,提出了一种改进的方法来测量颗粒的附着力,同时有效地消除气体分子的吸附效应。在该方法中,使用聚焦离子束,将小颗粒安装在AFM探针的尖端,并用于测量颗粒的附着力。为了确定环境压力和温度的影响,测量了不同条件下二氧化硅球与硅片之间的附着力。结果表明,在温度为200℃,环境压力<2.4 ×10 Pa的条件下,通过原子力显微镜测量附着力时,可以有效消除气体分子的吸附效应,实现颗粒的强附着力。该方法适用于月球颗粒样品黏附力的测量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Atomic Spectroscopy
Atomic Spectroscopy 物理-光谱学
CiteScore
5.30
自引率
14.70%
发文量
42
审稿时长
4.5 months
期刊介绍: The ATOMIC SPECTROSCOPY is a peer-reviewed international journal started in 1962 by Dr. Walter Slavin and now is published by Atomic Spectroscopy Press Limited (ASPL). It is intended for the rapid publication of both original articles and review articles in the fields of AAS, AFS, ICP-OES, ICP-MS, GD-MS, TIMS, SIMS, AMS, LIBS, XRF and related techniques. Manuscripts dealing with (i) instrumentation & fundamentals, (ii) methodology development & applications, and (iii) standard reference materials (SRMs) development can be submitted for publication.
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