Accession Number : ADA317545

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

Corporate Author : PITTSBURGH UNIV PA SURFACE SCIENCE CENTER

Personal Author(s) : Dohnalek, Z. ; Lyubinetsky, I. ; Yates, J. T., Jr

PDF Url : ADA317545

Report Date : 14 OCT 1996

Pagination or Media Count : 19

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 Si(100)-(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