Annual Summary Report on ONR Contract N00014-77-C-0018.
Technical rept. 1 Dec 85-1 Jul 86,
CHICAGO UNIV IL JAMES FRANCK INST
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Work carried out during this period has consisted of a detailed study of the adsorption, desorption and thermodynamics properties of CO on W110 covered with one or more CU monolayers. The most detailed measurements were made for W110Cu1. Preliminary equilibrium measurements were also made for W110Cu6. Some work function measurements for CO adsorption were also carried out on intermediate layer thicknesses. The principal tools in this phase of the work were thermal desorption, using a quadrupole mass spectrometer as detector for isothermal and temperature ramped measurements, and work function measurements using the newly constructed and high accurate, reproducible 1 meV and fast 0.1 sec response time Kelvin probe for work function measurements. The latter were used to determine sticking coefficients, coverage vs. temperature rise i.e. ramped desorption giving not the rate but the remaining coverage and adsorption isobars, i.e. coverage as function of surface temperature for a series of constant CO pressures.
- Physical Chemistry