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Probing molecule-surface interactions through ultra-fast adsorbate dynamics: Propane/Pt(111)

New J. Phys. 10, 125026 (2008)
A.P. Jardine, H. Hedgeland, D. Ward, Y. Xioaqing, W. Allison, J. Ellis and G. Alexandrowicz


3He spin echo measurements of the atomic scale motion of propane on a Pt(111) surface are presented. The measurements provide both the height of the energy barriers to diffusion and the strength of the frictional coupling of propane to the substrate. We show that both the rate and the nature of the dynamics we measure cannot be reproduced by an existing empirical potential. Using numerical simulation we derive a potential energy surface which is capable of reproducing the main features of our dataset.

The full text of this article may be found at: New J. Phys. 10, 125026 (2008)

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