The molecular structure of organic overlayers on palladium single crystal surfaces: A LEED and HREELS study
The surface structures of molecular overlayers on palladium single crystal surfaces have been determined by dynamical low energy electron diffraction (LEED) and by a combination of LEED and high resolution electron energy-loss spectroscopy (HREELS). CO molecules adsorbed on Pd and the molecular structure of the ordered (3/times/3) superlattice of coadsorbed benzene and CO on the Pd(111) crystal face has been investigated. A tabulation is compiled of the ordering characteristics of clean and adsorbate-covered single crystal surfaces based on diffraction patterns observed with LEED. Over 3000 structures are classified by rotational symmetry of the substrate surfaces and by type of sub-class: alloy surfaces, organic overlayers, coadsorbed overlayers, physisorbed overlayers, and high-Miller-index (stepped) surfaces. The important characteristics of each sub-class are reviewed and future directions of LEED investigations are proposed. 177 refs., 67 figs., 10 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6301821
- Report Number(s):
- LBL-26938; ON: DE89011775
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION
AROMATICS
BENZENE
BOND LENGTHS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
DIMENSIONS
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY-LOSS SPECTROSCOPY
HYDROCARBONS
LAYERS
LENGTH
METALS
MOLECULAR STRUCTURE
MONOCRYSTALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
RHODIUM
SCATTERING
SORPTION
SPECTROSCOPY
STRUCTURAL MODELS
SUPERLATTICES
SURFACES
TRANSITION ELEMENTS