Scanning tuneling microscopy tip-dependent image contrast of S/Pt(111) by controlled atom transfer

Conference · Fri Oct 01 00:00:00 EDT 1993

OSTI ID:71642

McIntyre, B J; Dunphy, J C; Salmeron, M; Somorjai, G A ^[1]; Sautet, P ^[2]

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1. Lawrence Berkeley Lab., CA (United States)
2. Institut de Recherche sur la Catalyse 2, Villeurbanne Cedex, (France). Lab. de Chemie Theorique

Sudden changes in the detailed appearance and corrugation of atomic-resolution scanning tunneling microscopy (STM) images are commonly observed. In particular, these effects for the Pt(111)({radical}3 {times} {radical} 3)R30{degrees}-sulfur structure have been studied. Corrugation changes have been investigated by the controlled transfer of atoms between tip and sample. Theoretical images simulations using electron scattering quantum chemical methods show that the image contrast is strongly dependent on the chemical identity of the STM tip atom. Observed changes in the sulfur images can be explained by changes from platinum-terminated to sulfur-terminated STM tips.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 71642
• Report Number(s): LBL--34503; CONF-9308266--1; ON: DE95011280
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
ATOM TRANSPORT
IMAGE PROCESSING
PLATINUM
SCANNING ELECTRON MICROSCOPY
SPATIAL RESOLUTION
SULFUR