AVS 53rd International Symposium
    Surface Science Thursday Sessions
       Session SS2+NS+TF-ThA

Invited Paper SS2+NS+TF-ThA1
Investigation of the Tribology of Diamondlike Carbon and SAMs using Molecular Dynamics

Thursday, November 16, 2006, 2:00 pm, Room 2004

Session: Tribology
Presenter: J. Harrison, United States Naval Academy
Authors: J. Harrison, United States Naval Academy
P. Mikulski, United States Naval Academy
G. Gao, United States Naval Academy
J. Schall, United States Naval Academy
Correspondent: Click to Email
Examination of the Tribology of DLC and SAMs using Molecular Dynamics@footnote 1@ The development of micron-sized devices, such as microelectromechanical devices, for terrestrial and space applications has prompted the need for protection of the surfaces of these devices. Amorphous carbon films, diamondlike carbon, and self-assembled monolayers (SAMs) are all possible candidates for the passivation and lubrication of these devices. The fundamental problem associated with controlling friction is a lack of understanding of the underlying atomic-scale processes that govern both friction and wear. Over the past several years, we have performed extensive molecular dynamics simulations using the REBO@footnote 2@ and the AIREBO@footnote 3@ potentials aimed at understanding the atomic-scale mechanisms of friction in hydrocarbon systems. We have examined the contact forces present at the interface of a nominally flat, DLC tip and model alkane SAMs during sliding. We have also examined the effects of tip roughness on the contact friction. In addition, we have done simulations that have analyzed the tribological, mechanical, and transport properties of amorphous carbon films and diamondlike carbon films with various compositions. Some of our recent results will be discussed. @FootnoteText@ @footnote 1@ This work was supported by The Air Force Office of Scientific Research under contracts F1ATA04295G001 and F1ATA04295G002 (The Extreme Friction MURI) and by The Office of Naval Research (N00014-06-WX-20205).@footnote 2@ D. W. Brenner, Shenderova, O. A., Harrison, J. A., Stuart, S. J., Ni, B., and Sinnott, S. B., J. Phys. C. 14, 783 (2002).@footnote 3@ S. J. Stuart, Tutein, A. B., and Harrison, J. A., J. Chem. Phys. 112, 6472 (2000). .