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Temperature programmed desorption of weakly bound adsorbates on Au(111).

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Engelhart,  D. P.
Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Wagner,  R. J. V.
Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Meling,  A.
Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Wodtke,  A. M.
Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Schäfer,  T.
Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society;

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Citation

Engelhart, D. P., Wagner, R. J. V., Meling, A., Wodtke, A. M., & Schäfer, T. (2016). Temperature programmed desorption of weakly bound adsorbates on Au(111). Surface Science, 650, 11-16. doi:10.1016/j.susc.2015.06.010.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-F416-E
Abstract
We have performed temperature programmed desorption (TPD) experiments to analyze the desorption kinetics of Ar, Kr, Xe, C2H2, SF6, N-2, NO and CO on Au(111). We report desorption activation energies (Edes), which are an excellent proxy for the binding energies. The derived binding energies scale with the polarizability of the molecules, consistent with the conclusion that the surface-adsorbate bonds arise due to dispersion forces. The reported results serve as a benchmark for theories of dispersion force interactions of molecules at metal surfaces.