ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
The adsorption of Cl2 on Cu{111} at 300 K has been studied using shadow-cone-enhanced secondary ion mass spectrometry (SIMS). The system has been investigated for chlorine coverages ranging from 0.08 to 0.33 monolayer (ML), including the Cu{111}-(√3×√3)R30°-Cl surface. The secondary Cu+ ion intensity has been measured as a function of the incidence angle of the primary ion beam. The enhanced intensity features in the spectra are compared with results from a two-body interaction calculation that uses the Molière approximation to the Thomas-Fermi potential. A chlorine-copper interlayer spacing of 1.87±0.04 Åis measured between the coverages of 0.17 and 0.33 ML. This value corresponds to a chlorine-copper bond length of 2.38±0.04 Å. At 0.08 ML, the chlorine-copper bond length is expanded to 2.48±0.04 Å. These results suggest that the chlorine-copper bond is more ionic in the low coverage limit.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
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