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Title
Japanese: 
English:In-situ Observation of Shear Deformation of Gold Single Real Contact Point at the Nanoscale 
Author
Japanese: 石田忠, 佐藤隆昭, 藤田博之.  
English: Tadashi Ishida, Takaaki Sato, Hiroyuki Fujita.  
Language English 
Journal/Book name
Japanese: 
English:Tribology Online 
Volume, Number, Page Vol. 7        pp. 127-131
Published date Sept. 30, 2012 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Abstract We in-situ observed the deformation of a gold single real contact point at the nanoscale during friction experiment in order to reveal the mechanism of friction. In this experiment, a special experimental setup combining between micro-electro-mechanical system (MEMS) and transmission electron microscope (TEM), called MEMS-in-TEM, was utilized for the stable visualization of the real contact point. Gold tips with electrostatic actuators were gently brought into contact and were rubbed each other at a quasi-static speed under TEM observation. Between tips, the gold single real contact point was formed and deformed in shear. During this deformation, the ends of the real contact point travelled 2.8 nm along the surface of the gold tips, although those of silicon and silver did not move. The maximum friction was 60 nN, repeating the stick-slip behavior from 35 to 60 nN. This result will be helpful to understand the mechanism of friction at the nanoscale and the lubrication mechanism of solid lubricants.

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