Accession Number:

ADA183059

Title:

Chemisorption and Reactions of Molecules on Semiconductor Surfaces.

Descriptive Note:

Final technical rept. 1 Apr 77-31 Mar 85,

Corporate Author:

IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Personal Author(s):

• Demuth, J. E.

Report Date:

1987-05-18

Pagination or Media Count:

11.0

Abstract:

We have performed experimental measurements of adsorbed atoms and molecules on metal and semiconductor surfaces over a wide range of temperatures 20K - 100K to identify the nature of bonding, the structure, reaction intermediates and reaction products. This has included simple hydrocarbon and organic molecules on Ni, Pd, Pt and Ag single-crystal surfaces. The techniques of UV photoemission, low energy electron diffraction and high resolution electron energy loss spectroscopy were used and further developed to extract new information. The electronically excited states of absorbates relevant to Surface Enhanced Raman and Surface Chemistry were also investigated. Later work on Si111 surfaces included studies of oxidation, water adsorption and metallization.

Descriptors:

• *MOLECULES
• *CHEMISORPTION
• *SEMICONDUCTORS
• *SURFACE REACTIONS
• ADATOMS
• EXPERIMENTAL DATA
• MEASUREMENT
• ORGANIC COMPOUNDS
• REACTANTS(CHEMISTRY)
• HYDROCARBONS
• OXIDATION
• ELECTRON DIFFRACTION
• LOW ENERGY
• METALS
• RAMAN SPECTRA
• SURFACE CHEMISTRY
• SURFACES
• PHOTOELECTRIC EMISSION
• ULTRAVIOLET RADIATION
• SPECTROSCOPY
• CHEMICAL BONDS
• NICKEL
• PALLADIUM
• PLATINUM
• SILVER
• ADSORPTION
• WATER
• TEMPERATURE

Subject Categories:

• Physical Chemistry
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE