Determination of the Microscopic Structure of Surface and Overlayers, Adsorbate-Adsorbate Interaction Energies, and Rates of Surface Processes.

摘要

Progress has occurred in three major areas. First, work has continued in the general area of surface crystallography making use of low-energy electron diffraction. Second, a supersonic nozzle ultrahigh vacuum molecular beam surface scattering machine has been designed and constructed. This extremely versatile instrument allows precise measurement of a wide variety of surface phemonena including the elementary steps in gas-solid chemical reactions. Finally, a high pressure microreactor has been designed and constructed. This microreactor will be a useful adjunct to the molecular beam machine since in the former overall reaction kinetics will be measured under realistic pressure conditions, whereas in the latter elementary reaction rates will be measured under conditions of low pressure. Each of these three projects is described in detail below.