only a Japanese version



2017年6月9日(金)10:40 理学研究科Z302講義室

Revealing the Origins of Friction via Atomic Force Microscopy

Prof. Mehmet Z. Baykara
Department of Mechanical Engineering, Bilkent University, Turkey

Friction is a universal phenomenon that plays a major role in various technical processes. Despite its importance from both practical and scientific points of view, the fundamental physical principles that govern friction are not well-understood. In this talk, we will report recent results of friction experiments based on atomic force microscopy (AFM) from our laboratory at Bilkent University. In particular, the remarkable discovery of structurally lubric sliding (i.e., sliding with ultra-low friction theoretically expected between atomically-flat, molecularly-clean interfaces formed by two crystalline but incommensurate surfaces) exhibited by gold nano islands on graphite under ambient conditions will be introduced [1]. The talk will conclude with a discussion regarding the extension of structural lubricity to noble metals other than gold.

[1] E. Cihan, S. İpek, E. Durgun, M.Z. Baykara, Nature Communications 7, 12055 (2016)