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Silver sulphide growth on Ag(111) : a medium energy ion scattering study

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Window, A. J. (Amanda J.), Hentz, A., Sheppard, Daniel Crispin, Parkinson, G. S., Woodruff, D. P., Noakes, T. C. Q. and Bailey, P.. (2010) Silver sulphide growth on Ag(111) : a medium energy ion scattering study. Surface Science, Vol.604 (No.15-16). pp. 1254-1260. ISSN 0039-6028

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Official URL: http://dx.doi.org/10.1016/j.susc.2010.04.009

Abstract

The interaction of S-2 with Ag(111) under ultra-high vacuum conditions has been investigated by medium energy ion scattering (MEIS). 100 key He+ MEIS measurements provide a direct confirmation of a previous report, based on thermal desorption, that the growth of multilayer films of Ag2S occurs through a continuous corrosion process. These films show a commensurate (root 7 x root 7)R19 degrees unit mesh in low energy electron diffraction, consistent with the epitaxial growth of (111) layers of the high-temperature F-cubic phase of Ag2S. The substantial range of co-existing film thicknesses found indicates that the growth must be in the form of variable-thickness islands. The use of 100 key H+ incident ions leads to a very rapid decrease in the sulphide film thickness with increasing exposure that we attribute to an unusual chemical leaching, with implanted H atoms interacting with S atoms and desorption of H2S from the surface.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Silver sulfide -- Synthesis
Journal or Publication Title:	Surface Science
Publisher:	Elsevier Science BV
ISSN:	0039-6028
Date:	15 August 2010
Volume:	Vol.604
Number:	No.15-16
Number of Pages:	7
Page Range:	pp. 1254-1260
Identification Number:	10.1016/j.susc.2010.04.009
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/5593