The study of adsorbate-defect interaction effects has been carried out by measuring the contribution of CO adsorbed on different bonding sites to the resistivity of 50 nm epitaxial Cu(100) films. Terrace-bonded CO is found to make a much greater contribution to the surface resistivity than defect-bonded CO, which has a near-zero contribution corresponding to a near-zero net scattering cross section of electrons. The reduced scattering cross section of defect CO may be attributed to the higher local d-band energy at defects than at terraces. Another possible explanation involve strong scattering by the bare defect that is modestly reduced by the adsorption of CO.Such measures prevent electron scattering off of residual gas atoms as well as the formation of a thin gas or adsorbate layer on the surface of the specimen which ... If the electrons are travelling very fast, they will impinge on the outer cylinder.
|Title||:||Interactions of Adsorbates on Copper(100) Films Investigated by Surface Resistivity Measurements|
|Publisher||:||ProQuest - 2008|