Dynamics of Gas-Surface Interactions
Abstract
This research initiative has dealt with the interaction of atomic, molecular, electron, and optical beams with well-characterized single crystal surfaces. These studies were motivated by a desire to understand and control catalytic surface chemistry, the technological need to characterize the physical properties of thin films and surfaces, and the desire to understand how energy and momentum are exchanged at the surface of a material when it is subjected to gas-surface collisions, electron-surface collisions, optical illumination, or chemical reaction. During the past grant period, two major new scattering instruments were completed. One is a high performance neutral particle scattering apparatus, which routinely achieves an energy resolution of ca. 300 micro-eV. It has successfully performed elastic and inelastic scattering measurements on alkali halide, semiconductor, and metallic surfaces. Results are presented in this final report for Lithium Fluoride (001), Silicon (001)-(2x1), and Silver (110). The Si phonon dispersion measurements differ markedly from theoretical calculations, and strongly suggest that the dynamical properties of partially disordered surfaces merit increasing attention in this program. Gas surface interactions, Electron surface interactions, Inelastic scattering, Gas surface energy transfer, Surface phonons, Lithium fluoride, Silicon, Silver.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 02, 1989
- Accession Number
- ADA206210
Entities
People
- S. J. Sibener
Organizations
- University of Chicago