Dynamics of the striped nanostructure of the oxidized Cu(110) surface: A momentum-resolved electron stimulated desorption ion angular distribution study
- Surface Science Center, Departments of Chemistry and Physics, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
The striped structure of the partially oxidized Cu(110) surface has been studied using a novel technique, momentum-resolved electron stimulated desorption ion angular distribution (ESDIAD) Long {hor_ellipsis}O{endash}Cu{endash}O{hor_ellipsis} strings oriented in the {l_angle}001{r_angle} direction and exhibiting attractive interactions with each other form periodically arranged stripes with widths in the nanometer range [D. J. Coulman {ital et al.}, Phys. Rev. Lett. {bold 64}, 1761 (1990); K. Kern {ital et al.}, {ital ibid.} {bold 67}, 855 (1991)]. Two different oxygen sites were detected, leading to a twofold symmetrical four-beam O{sup +} ESDIAD pattern with 22{degree} tilting of the beams in the {l_angle}1{bar 1}0{r_angle} azimuth ({ital A}) direction and 8{degree} in the {l_angle}001{r_angle} azimuth ({ital B}) direction. The relative intensities of the four beams have been compared for a wide range of oxygen coverages leading to a model in which the {ital A} beams correspond to O{sup +} ions desorbing from the edges of the stripes and the {ital 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 where the Ar is preferentially adsorbed on the edges of the stripes. The dynamical motion of the one-dimensional {hor_ellipsis}O{endash}Cu{endash}O{hor_ellipsis} oscillator chains situated at the edges of the stripes has been studied by momentum-resolved ESDIAD measurements over a broad range of temperatures (80{endash}650 K). {copyright} {ital 1999 American Vacuum Society.}
- OSTI ID:
- 359794
- Report Number(s):
- CONF-981126-; ISSN 0734-2101; TRN: 9914M0042
- Journal Information:
- Journal of Vacuum Science and Technology, A, Vol. 17, Issue 4; Conference: 45. annual American Vacuum Society symposium and topical conference, Baltimore, MD (United States), 2-6 Nov 1998; Other Information: PBD: Jul 1999
- Country of Publication:
- United States
- Language:
- English
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