AVS 45th International Symposium
    Surface Science Division Wednesday Sessions
       Session SS3-WeM

Paper SS3-WeM9
Dynamics of the Striped Nanostructure of the Oxidized Cu(110) Surface: A Momentum-Resolved ESDIAD Study

Wednesday, November 4, 1998, 11:00 am, Room 314/315

Session: Surface Dynamics and Roughening
Presenter: D. Mocuta, University of Pittsburgh
Authors: D. Mocuta, University of Pittsburgh
J.W. Ahner, University of Pittsburgh
J.-G. Lee, University of Pittsburgh
S. Denev, University of Pittsburgh
J.T. Yates, Jr., University of Pittsburgh
Correspondent: Click to Email
The striped structure of the partially oxidized Cu(110) surface has been studied using a novel technique, Momentum-Resolved ESDIAD. Long ...O-Cu-O... strings oriented in the <001> direction and exhibiting attractive interactions with each other form periodically arranged stripes with widths in the nanometer range.@footnote 1,2@ Two different oxygen sites were detected, leading to a two-fold symmetrical four beam O@super +@ ESDIAD pattern with tilting of the beams of 22° in the <110> azimuth (A) and 8° in the <001> azimuth (B) directions. The relative intensities of the four beams have been compared for a wide range of oxygen coverages leading to a model in which the A beams correspond to O@super +@ ions desorbing from the edges of the stripes and the B beams from the internal regions of the stripes. This model is confirmed by studying the effect of the coadsorption of Ar at 32 K on the oxidized structure. The dynamical motion of the one-dimensional ...O-Cu-O... oscillator chains situated at the edges of the stripes has been studied by Momentum-Resolved ESDIAD measurements over a broad range of temperatures (70 K- 650 K). In addition, this striped surface has been used as a template for the adsorption of other species, whose interactions with the ...O-Cu-O... chains are revealed. @FootnoteText@ @footnote 1@D. J. Coulman, J. Wintterlin, R. J. Behm, G. Ertl, Phys. Rev. Lett. 64 (1990) 1761. @footnote 2@K. Kern, H. Niehus, A. Schatz, P. Zeppenfeld, J. George, G. Comsa, Phys. Rev. Lett. 67 (1991) 855.