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

Personal Author(s):

• Dohnalek, Z.
• Lyubinetsky, I.
• Yates, J. T., Jr

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.

Descriptors:

• *PULSED LASERS
• *SILICON
• *DESORPTION
• *CHLORINE
• REMOVAL
• SCANNING ELECTRON MICROSCOPES
• TUNNELING(ELECTRONICS)
• SITES
• ATOMS
• LASER BEAMS
• TOPOGRAPHY
• SEQUENCES
• BRIGHTNESS
• IMAGES
• IRRADIATION
• TUNNELING
• DIMERS

Subject Categories:

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

Distribution Statement:

APPROVED FOR PUBLIC RELEASE