Adsorption Properties of the Cu(115) Surface: Basic Interfaces

• Authors: P. Godowski , A. Groso , S. Hoffmann , J. Onsgaard
• Languages of publication: EN

Abstracts

EN

The interfaces: K/Cu(115) and CO/Cu(115) have been characterized using surface sensitive techniques, including low energy electron diffraction and photoelectron spectroscopy. K adatoms show tendency to occupy the sites close to the step edges. At low temperature (near 125 K), after completion of two layers, potassium grows in 3D islands (the Stranski-Krastanov mode). At higher temperature, e.g. at room temperature, potassium introduces reconstruction of the substrate even at low coverages. Calibration of the alkali coverage, up to completion of the first layer, using the work function changes curve has been confirmed as a very convenient and precise procedure. The adsorbed state of CO at 130 K has been identified by registration of core levels obtained by the use synchrotron radiation photoelectron spectroscopy. The characteristics of the main 1s and satellite peaks have been analyzed in context of substrate geometry and compared with the ones of other copper planes. There are no indications of dissociative adsorption of CO, only residual carbon and oxygen were found after adsorbate desorption around 220 K. CO molecules show a strong tendency to "on top" adsorption in sites far from the step edges of the Cu(115) surface.

Keywords

EN

68.43.Fg; 68.55.Ac; 61.14.Hg; 79.60.Dp

Discipline

• 79.60.Dp: Adsorbed layers and thin films
• 68.43.Fg: Adsorbate structure (binding sites, geometry)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 6
• Pages: 928-935

Dates

published

2010-06

received

2009-12-21

(unknown)

2010-04-10

Contributors

author

P. Godowski

• Institute of Experimental Physics, University of Wrocław, 50-204 Wrocław, Poland

author

A. Groso

• Ecole Polytechnique Fédérale de Lausanne, SB-SST CH J2 491 Station 6, Lausanne, Switzerland

author

S. Hoffmann

• Institute for Physics and Astronomy, Aarhus University, DK-8000 Århus C, Denmark

author

J. Onsgaard

• Department of Physics and Nanotechnology, Aalborg University, DK-9220 Aalborg Øst, Denmark

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Identifiers

DOI

10.12693/APhysPolA.117.928