Quantitative analysis of Scanning Tunneling Microscopy images for surface structure determination: Sulfur on Re(0001)

Conference · Mon Feb 01 04:00:00 EST 1993

OSTI ID:10183163

Ogletree, D F; Dunphy, J C; Salmeron, M B ^[1]; Sautet, P ^[2]

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1. Lawrence Berkeley Lab., CA (United States)
2. ENS, Lyon (France). Lab. de Chemie Theoretique

Scanning Tunneling Microscopy (STM) images of adsorbed atoms and molecules on single crystal substrates provide important information on surface structure and order. In many cases images are interpreted qualitatively based on other information on the system. To obtain quantitative information, a theoretical analysis of the STM image is required. A new method of calculating STM images is presented that includes a full description of the STM tip and surface structure. This method is applied to experimental STM images of sulfur adsorbed on Re(0001). Effects of adsorption site, adsorbate geometry, tip composition and tunnel gap resistance on STM image contrast are analyzed. The chemical identity of tip apex atom and substrate subsurface structure are both shown to significantly affect STM image contrast.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10183163
• Report Number(s): LBL--33786; CONF-930159--54; ON: DE93019235
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101
ACTIVATION, NUCLEAR REACTION, RADIOMETRIC, AND RADIOCHEMICAL PROCEDURES
ADSORPTION
IMAGES
MICROSCOPY
PHYSICAL PROPERTIES
RHENIUM
SORPTIVE PROPERTIES
SULFUR
SURFACES
TUNNEL EFFECT