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Nanoscale Lubrication and Friction Control
Abstract Knowledge pertaining to the molecular-scale origins of structure, dynamics, response characteristics and rheology of highly confined liquids, and of their dependencies on molecular size, shape and complexity, is of importance for the molecular design of lubricants in nanoscale junctions. In this article we review recent progress toward understanding the nature of such systems, obtained through comparative grand-canonical molecular dynamics simulations for confined liquids made of molecules of different shapes (globular versus alkane chains), sizes (short versus longer chains, i.e., hexadecane and tetracosane) and complexity (straight alkanes and a branched one, squalane). Energetic and entropic contributions to the solvation forces for these systems are discussed. Subsequently, we describe a novel method for controlling friction through small-amplitude (∼1Å) oscillations of the confining boundaries in the direction perpendicular to the shear plane. The results of the simulations are analyzed via a generalized rate-and-state model.
Nanoscale Lubrication and Friction Control
Abstract Knowledge pertaining to the molecular-scale origins of structure, dynamics, response characteristics and rheology of highly confined liquids, and of their dependencies on molecular size, shape and complexity, is of importance for the molecular design of lubricants in nanoscale junctions. In this article we review recent progress toward understanding the nature of such systems, obtained through comparative grand-canonical molecular dynamics simulations for confined liquids made of molecules of different shapes (globular versus alkane chains), sizes (short versus longer chains, i.e., hexadecane and tetracosane) and complexity (straight alkanes and a branched one, squalane). Energetic and entropic contributions to the solvation forces for these systems are discussed. Subsequently, we describe a novel method for controlling friction through small-amplitude (∼1Å) oscillations of the confining boundaries in the direction perpendicular to the shear plane. The results of the simulations are analyzed via a generalized rate-and-state model.
Nanoscale Lubrication and Friction Control
Gao, Jianping (author) / Luedtke, W. D. (author) / Landman, Uzi (author)
2001-01-01
23 pages
Article/Chapter (Book)
Electronic Resource
English
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