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首页> 外文期刊>International journal of nanomechanics science and technology >A VARIANT OF DESCRIBING ADHESION INTERACTION IN THE PROBE-SAMPLE SYSTEM OF AN ATOMIC-FORCE MICROSCOPE
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A VARIANT OF DESCRIBING ADHESION INTERACTION IN THE PROBE-SAMPLE SYSTEM OF AN ATOMIC-FORCE MICROSCOPE

机译：描述原子力显微镜探针-样品系统中粘附相互作用的变量

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摘要

The paper presents a variant of describing the adhesion interaction in the probe–sample system of an atomic-force microscope constructed within the framework of the deformable solid mechanics. The variant is based on the concept of nonlocal pair and triple potential interactions of particles of a continuous elastic medium with account for the criteria of thermodynamicity and stability of both the discrete system of interacting material points and the system of infinitesimal particles constituting a continuous medium. In this case, the potentials of interaction of continuous medium particles are considered as the limits of analogous potentials of the interaction of particles forming an infinite sequence of discrete systems with distance between them, their masses, momenta, and energy tending to zero. The parameters of the interparticle potentials and the characteristics of the adhesive interaction between the sample and the probe are expressed in terms of the characteristics of the elastic state — Young's modulus and Poisson's ratio — under the assumption of their homogeneity, linear elasticity, and the isotropy of their materials. In order to verify the qualitative and quantitative adequacy, the model developed is used to calculate the dependence of the force of the van der Waals interaction between the probe (platinum) and the sample (graphite) on the distance between them. The results of calculation are in satisfactory agreement with the available data.
机译：本文提出了一种变体，描述了在可变形固体力学框架内构建的原子力显微镜的探针-样品系统中的粘附相互作用。该变体基于连续弹性介质颗粒的非局部对和三重电位相互作用的概念，并考虑了构成相互作用介质的离散的相互作用材料点系统和无穷小颗粒系统的热力学和稳定性标准。在这种情况下，连续介质粒子的相互作用电势被视为形成相互作用的无穷序列的粒子之间相互作用的类似电势的极限，它们之间的距离，质量，动量和能量趋于零。在均质性，线性弹性和各向同性的假设下，通过弹性态的特性（杨氏模量和泊松比）来表示粒子间电势的参数以及样品与探针之间的粘附相互作用的特性他们的材料。为了验证定性和定量的适当性，使用开发的模型来计算探针（铂）与样品（石墨）之间范德华相互作用的力对其之间距离的依赖性。计算结果与现有数据令人满意。

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