Model calculations of STM imaging and manipulation of oxygen on Pt(111) |
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| Affiliation: | 1. Fachbereich Physik, Universität Konstanz, 78457 Konstanz, Germany;2. Humboldt-Universität zu Berlin, Institut für Chemie, 10099 Berlin, Germany;1. Dipartimento di Fisica, Università della Calabria, 87036 Cosenza, Rende, Italy;2. Vinca Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;3. Department of Applied Mathematics and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 |
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| Abstract: | We study tip-adsorbate–substrate interactions in scanning tunneling microscopy (STM) manipulation and imaging, and the influence of impurities on the images. Thence, we perform molecular dynamics simulations and calculate qualitative STM images for oxygen on Pt(1 1 1) surface. The adsorption site of the oxygen molecule is found to be in accordance with ab initio calculations. The calculated STM image has a good resemblance to the experimental ones. The contamination of the tip by oxygen or water alters the STM image strongly. Molecular dynamics simulations on manipulations of oxygen on the surface reveal several mechanisms of how molecular oxygen can be either produced or decomposed with STM tip. Finally, we find out that transfer of oxygen from the surface to an STM tip is not very probable. |
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