Physical Interpretation of Adhesional interaction between surfaces

表面之间粘附相互作用的物理解释

• 批准号: 10044137
• 负责人: TAKAHASHI Kunio
• 金额: $ 1.79万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10044137/
• 关键词: adhesion; atomic force microscope; ultra high vacuum; molecular dynamics; chemical bond; interface; electronic spectroscopy; surface analysis; 擬着

A force measurement system constructed in ultra high vacuum chamber of Auger electron spectroscope is upgraded and the adhesional forces between materials are measured. Results are interpreted with the terms of physics. The continuum theory and the numerical analysis using molecular mechanics theory are used for the interpretation. Almost whole the Grant-In-Aid is used for the trip of the investigators.Adhesional forces were measured for several materials in the range of elasticity.Samples were manipulated to approach to contact and then they are manipulated to separate themselves. After the measurements of adhesional forces, surfaces were observed by scanning electron microscope (SEM) and scanning Auger microscope (SAM). Although the atomic transfer between contacting samples was sometimes observed, there are some cases no transfer could observed by SAM.In theoretical approach, continuum theories are used for the systematic understanding and the interpretation of adhesional forces between sample. For the precise investigation, modified embedded atom method (MEAM) is discussed. It is made for the simulation of bulk properties of materials. However, the applicability of the MEAM to surface problems were suggested. At the limit when the size of atoms are not negligible, molecular mechanics becomes significant.

对俄歇电子能谱仪超高真空室中构建的力测量系统进行升级，测量材料之间的附着力。结果用物理学术语解释。使用连续介质理论和利用分子力学理论的数值分析进行解释。几乎整个援助金都用于研究人员的旅行。在弹性范围内测量了几种材料的粘附力。操纵样品接近接触，然后操纵它们自行分离。测量粘附力后，通过扫描电子显微镜（SEM）和扫描俄歇显微镜（SAM）观察表面。虽然有时可以观察到接触样品之间的原子转移，但在某些情况下，SAM 无法观察到转移。在理论方法中，连续介质理论用于系统地理解和解释样品之间的粘附力。为了进行精确的研究，讨论了改进的嵌入原子方法（MEAM）。它是为了模拟材料的整体特性而设计的。然而，人们提出了 MEAM 对表面问题的适用性。当原子尺寸不可忽略的极限时，分子力学就变得很重要。