A Fundamental Study on Nanotribology

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The reserach of Nanotribology was carried out by using STM(Scanning tunneling microscope)and AFM(Atomic Force Microscope). The purpose of this investigation is to establish the fundamentals of tribology in nanometer scale which have not been studied by anyone. From this investigation during these two years, the following interesting results with respect to micro adhesion force and micro deformation of materials at the contact interface were obtained.(1)Micro Adhesion ForceThe force which is caused by interaction force between contact interface such as attractive and repulsive force are adhesion force occurred with friction. When we think about friction force at the contact interface in nanometer scale, this adhesion force will be very important. Therefore, in order to analyze the mechanism of adhesion-force, adhesive force was measured by STM and AFM, as the result, the mechanism of adhesion force could be explained theoretically.(2)Micro DeformationWhen we think about wear and machining in nanometer scale, micro deformation in atomic revel will be very important. Therefore, in order to analyze the deformation mechanism, micro plastic deformation was measured by using new method : a diamond STM probe tip was indented on the gold surface directly. As the result, it became clear that the behavior of micro deformation in nanometer scale could be applied general material dynamics.