Measurement of Inter-materials forces by Atomic Force Microscopy (AFM) .

固体间的粘着接触在摩擦学和连接技术领域具有重要意义。在本研究中，我们提出了修正的MYD理论，该理论考虑了原子力显微镜悬臂梁等测量系统的刚度。总能量假定为beE_total=E_elastic+E_interface+E_surface+E_stiffness.where。E_rM弹性是接触球的弹性能，$E_rM界面是接触区内从表面到界面的能量变化。E_表面是接触区外表面之间的势能，E_刚度是测量系统的刚度的贡献，当系统的刚度为无穷大时，我们的方法与原方法一致，而当表面之间的相互作用可以忽略时，我们的方法符合作者先前的极限理论。在此基础上，将原子力显微镜引入具有离子抑制系统的超高真空室中，并将其引入超高真空室中。离子溅射后，测量了材料间的作用力。并用上述理论对结果进行了讨论。测量结果不仅与材料间的电子相互作用有关，而且还与测量系统的表面粗糙度和硬度有关。为了从材料科学的角度更好地理解粘附性，更好地定义条件是必不可少的。

The adhesional contact between two solids is significant in the fields of tribology and the joining technology. It is also important for the design of surface force apparatuses such as atomic force microscopy (AMF) .In the present study, we propose the modified MYD theory taking account of the stiffness of the measurement system such as the cantilever of atomic force microscopy (AMF) .The total energy is assumed to beE_total=E_elastic+E_interface+E_surface+E_stiffness.where $E_{\rm elastic} $ is the elastic energy of contacting sphere (pin) , $E_{\rm interface} $ is the term for the energy change from surface to interface within the contact region, E_surface is the potential energy between surfaces outside of the contact region and E_stiffness is the contribution by the stiffness of the measurement system.Our approach conforms to the original one in the limit when the stiffness becomes infinite and conforms to the authors prior theory in the limit when the interaction between surfaces are negligible. Furthermore, the present approach conforms to the JKR theory in the limit when the stiffness becomes infinite and the interaction between surfaces are negligible.In the present study, we introduce the AFM to ultra high vacuum chamber which has ion supttering system. After the ion sputtering, the intermaterial forces are measured. The results are discussed with above thory. Not only intermaterial electronic interation, but also the surface roughness and the stiffness of the measurement system affact on the results. In order to understand the adhesion more in terms of material science, the more well defined condition is essential.