Accession Number:

ADA199922

Title:

Scanning Tunneling Microscopy as a Surface Chemical Probe

Descriptive Note:

Final rept. 1 Dec 1984-31 May 1988

Corporate Author:

MARYLAND UNIV COLLEGE PARK DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s):

Report Date:

1988-05-31

Pagination or Media Count:

20.0

Abstract:

The instrumentation needed for combining a new imaging technique, Scanning Tunneling Microscopy STM, with standard surface analytical methods has been developed. The surface analytical capabilities of a new system have demonstrated by study of the Barium catalyzed oxidation of Nickel. The operation of the STM has been demonstrated by a detailed study of the imaging of the graphite surface. The changes in graphite imaging with tunneling voltage have been measured and compared with theoretical predictions of the effect of surface change density and surface deformation on imaging via STM. The combination of STM with the surface analytical probes has been demonstrated in a comparison of LEED and STM measurements of a stepped Si surface. It is shown that LEED is rather insensitive to structural changes that are readily apparent using STM.

Subject Categories:

  • Inorganic Chemistry
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE