Abstract
Pulsed molecular beam scattering technique was applied to analyze the dynamics of a large planar molecule migrating on various surfaces (Au(1 1 1), graphite(0 0 0 1), mica (0 0 1), amorphous silicon oxide). It was found that molecules can stay on the surface for seconds without condensation. Activation energies have a magnitude comparable to those of a single ionic or covalent bonding, which reflects the additivity of the van der Waals interaction. Possible contribution of the diffusion to the surface residence time is discussed.
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