کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5423715 | 1507949 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thiolate-induced lateral distortion of the Cu(100) surface
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Medium energy ion scattering (MEIS) with 100 keV H+ incident ions has been used to explore adsorbate-induced distortions of the Cu(100) surface in the Cu(100)(2 Ã 2)-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 Ã 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¯10], [1¯00], and [2¯11]directions are consistent with such a lateral shift of 0.12 ± 0.04 Ã
, 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 Ã
. This local strain is attributed to adsorbate-induced compressive stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 604, Issues 19â20, September 2010, Pages 1727-1732
Journal: Surface Science - Volume 604, Issues 19â20, September 2010, Pages 1727-1732
نویسندگان
D.C. Sheppard, M. Walker, C.F. McConville, D.P. Woodruff, T.C.Q. Noakes, P. Bailey,