Accession Number:

ADA317545

Title:

Laser Pulse Desorption Under STM Tip-Cl Removal from Single Site on Si(100).

Descriptive Note:

Corporate Author:

PITTSBURGH UNIV PA SURFACE SCIENCE CENTER

Report Date:

1996-10-14

Pagination or Media Count:

19.0

Abstract:

The desorption of pairs of chlorine atoms influenced by the tip of a scanning tunneling microscope is achieved at preselected sites on the Cl-saturated Si100-2x1 surface using nanosecond laser pulse irradiation of the tip within the tunneling range. Bright features observed for the empty state topographic images after a laser pulse sequence are interpreted to be due to bare Si-Si dimers formed by laser induced desorption of two Cl atoms underneath the tip. The Cl desorption mechanism involves the enhancement of the sample - tip interaction due to laser pulse induced tip heating and tip expansion.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE