Selected Molecular Surface Structures Determined by ModernLow-Energy Electron Diffraction
This article surveys a series of structural results obtained for the adsorption of small molecules (from CO to benzene) on the closest-packed metal surfaces by low-energy electron diffraction (LEED). Most of these results were obtained by detailed fitting of many structural parameters, primarily with automated tensor LEED. We discuss mainly qualitative aspects: adsorption sites, adsorbate orientation, molecular distortions and adsorbate-induced relaxations. Cases of special interest include: CO and NO monolayers adsorbed on metal surfaces, which require a revision of adsorption site assignments based on vibrational frequencies; various coadsorption structures exhibiting site changes due to the electron donor vs, acceptor character of the coadsorbates; intact di-sigma ethylene adsorbed in a disordered and asymmetrical manner on Pt(111); intact acetylene on MgO(100), the first molecular and also first physisorbed adsorption structure determined in detail on an oxide surface; and the surface of an ultra-thin ice film, exhibiting unusually large vibration amplitudes of the outermost molecules.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Energy Research
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 899530
- Report Number(s):
- LBNL-40517; TRN: US200708%%194
- Journal Information:
- Journal of Molecular Catalysis A - chemical, Vol. 131, Issue 1-3; Related Information: Journal Publication Date: 05/01/1998
- Country of Publication:
- United States
- Language:
- English
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