Molecular dynamics simulation of atomic-scale frictional behavior of corrugated nano-structured surfaces

Hyun Joon Kim, Dae Eun Kim

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Surface morphology is one of the critical parameters that affect the frictional behavior of two contacting bodies in relative motion. It is important because the real contact area as well as the contact stiffness is dictated by the micro- and nano-scale geometry of the surface. In this regard, the frictional behavior may be controlled by varying the surface morphology through nano-structuring. In this study, molecular dynamics simulations were conducted to investigate the effects of contact area and structural stiffness of corrugated nano-structures on the fundamental frictional behavior at the atomic-scale. The nano-structured surface was modeled as an array of corrugated carbon atoms with a given periodicity. It was found that the friction coefficient of the nano-structured surface was lower than that of a smooth surface under specific contact conditions. The effect of applied load on the friction coefficient was dependent on the size of the corrugation. Furthermore, stiffness of the nano-structure was identified to be an important variable in dictating the frictional behavior.

Original languageEnglish
Pages (from-to)3937-3944
Number of pages8
JournalNanoscale
Volume4
Issue number13
DOIs
Publication statusPublished - 2012 Jul 7

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Molecular dynamics
Stiffness
Computer simulation
Surface morphology
Friction
Carbon
Atoms
Geometry

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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abstract = "Surface morphology is one of the critical parameters that affect the frictional behavior of two contacting bodies in relative motion. It is important because the real contact area as well as the contact stiffness is dictated by the micro- and nano-scale geometry of the surface. In this regard, the frictional behavior may be controlled by varying the surface morphology through nano-structuring. In this study, molecular dynamics simulations were conducted to investigate the effects of contact area and structural stiffness of corrugated nano-structures on the fundamental frictional behavior at the atomic-scale. The nano-structured surface was modeled as an array of corrugated carbon atoms with a given periodicity. It was found that the friction coefficient of the nano-structured surface was lower than that of a smooth surface under specific contact conditions. The effect of applied load on the friction coefficient was dependent on the size of the corrugation. Furthermore, stiffness of the nano-structure was identified to be an important variable in dictating the frictional behavior.",
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Molecular dynamics simulation of atomic-scale frictional behavior of corrugated nano-structured surfaces. / Kim, Hyun Joon; Kim, Dae Eun.

In: Nanoscale, Vol. 4, No. 13, 07.07.2012, p. 3937-3944.

Research output: Contribution to journalArticle

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