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Thiolate-induced lateral distortion of the Cu(100) surface by D.C. Sheppard; M. Walker; C.F. McConville; D.P. Woodruff; T.C.Q. Noakes; P. Bailey is a Physics and Astronomy article available to read on EtoBox.
What is Thiolate-induced lateral distortion of the Cu(100) surface about?
## Low index single crystal surfaces Medium energy ion scattering (MEIS) with 100 keV H + incident ions has been used to explore adsorbateinduced distortions of the Cu(100) surface in the Cu(100)(2 × 2)-CH 3 S (methylthiolate) phase. Previous identification of a methylthiolate-induced pseudo-(100) reconstruction of Cu( 111) with Cu-Cu spacings 15% larger than on Cu(100) have led to the suggestion that on Cu(100) in the commensurate (2 × 2) phase a lateral radial expansion of the Cu atoms surrounding the thiolate in a four-fold coordinated hollow should occur. Changes in the scattered ion yields for incidence in 1⁄2 P 110, 1⁄2 P 100, and 1⁄2 P 211directions are consistent with such a lateral shift of 0.12 ± 0.04 Å, while changes in the MEIS blocking-curve dips indicate that these lateral shifts are accompanied by an outward expansion of the outermost surface layer spacing of 0.08 ± 0.04 Å. This local strain is attributed to adsorbate-induced compressive stress.
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- Author
- D.C. Sheppard; M. Walker; C.F. McConville; D.P. Woodruff; T.C.Q. Noakes; P. Bailey
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0039-6028)
- Published
- 2010
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)