Sheppard, Daniel Crispin, Walker, Marc, McConville, C. F. (Chris F.), Woodruff, D. P., Noakes, T. C. Q. and Bailey, P. (Paul). (2010) Thiolate-induced lateral distortion of the Cu(100) surface. Surface Science, Vol.604 (No.19-20). pp. 1727-1732. ISSN 0039-6028

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Abstract

Medium energy ion scattering (MEIS) with 100 key H+ incident ions has been used to explore adsorbate-induced distortions of the Cu(100) surface in the Cu(100)(2x2)-CH3S (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 x 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) over bar 10], [(1) over bar 00], and [(2) over bar 11]directions are consistent with such a lateral shift of 0.12 +/- 0.04 angstrom, 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 angstrom. This local strain is attributed to adsorbate-induced compressive stress. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Surfaces (Physics), Copper, Thiols, Ions -- Scattering
Journal or Publication Title:	Surface Science
Publisher:	Elsevier Science BV
ISSN:	0039-6028
Date:	September 2010
Volume:	Vol.604
Number:	No.19-20
Number of Pages:	6
Page Range:	pp. 1727-1732
Identification Number:	10.1016/j.susc.2010.06.022
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/5168

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