Nano Archive

Nanomechanical studies of superlubricity

Sasaki, Naruo and Itamura, Noriaki and Tsuda, Daisuke and Miura, Kouji (2007) Nanomechanical studies of superlubricity. CURRENT NANOSCIENCE, 3 (1). pp. 105-115.

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We briefly review the nanomechanical studies of ultralow friction in the following carbon hybrid systems: atomic force microscopy (AFM) tip on graphite surface, AFM tip on C-60/graphite, graphite on graphite surface, graphite/C-60/graphite, and C-60 intercalated graphite. For the atomic and flake frictions, frictional force maps are compared between simulations and experiments, which can be explained by stick-slip motion of the tip apex atom and flake. For the graphite/C-60/graphite system, Super lubricity appears, where the maximum static frictional forces have finite values but denote that dynamical frictional forces are zero within the resolution of the experiment. Furthermore, for the C-60 intercalated graphite system, greater superlubricity appears. It is clarified that fullerene intercalated graphite films exhibit ultralow average friction force, and excellent friction coefficients mu < 0.001. Our results propose one of the simple guidelines of designing a practical superlubric system - reduction of the contact area between intercalated C-60 and graphite sheet to the point contact. Clearly, the C-60 intercalated graphite system will contribute to solving energy and environmental problems in the future.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Material Science > Functional and hybrid materials
Physical Science > Nano objects
ID Code:2828
Deposited By:Farnush Anwar
Deposited On:09 Jan 2009 15:47
Last Modified:22 Jan 2009 16:49

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