AVS 50th International Symposium
    Surface Science Wednesday Sessions
       Session SS-WeP

Paper SS-WeP14
QCM Studies of Phonon and Electron Scattering Effects for Monolayer Octane/Cu(111) and Octane/Pb(111) Interfaces

Wednesday, November 5, 2003, 11:00 am, Room Hall A-C

Session: Poster Session
Presenter: T. Coffey, North Carolina State University
Authors: T. Coffey, North Carolina State University
J. Krim, North Carolina State University
Correspondent: Click to Email
The surface resistivity and sliding friction of thin films on metal surfaces has been linked to the scattering of conduction electrons from phonons and imperfections in the lattice. It is also believed that the damping of Frustrated Translational (FT) phonon modes are related to friction between adsorbates and substrates.@footnote 1@ The parallel FT modes are believed to be directly linked to sliding friction, but it is not clear how changes in the damping of perpendicular FT modes affects sliding friction. The perpendicular FT mode of octane adsorbed on Cu(111) has a damping constant that is twice as large as that of octane adsorbed on Pb(111).@footnote 2@ We are using QCM to study octane sliding on copper and lead surfaces to determine how the damping of perpendicular FT modes affect sliding friction. We have observed an increase in sliding friction as the damping of the perpendicular FT mode increased. @FootnoteText@ @footnote 1@ B.N.J. Persson, Sliding Friction, Physical Principles and Applications, Springer, Berlin (2000)@footnote 2@ D. Fuhrmann and Ch. Woll, Surface Science 368 (1996) 20-26. .