Competition between Surface Layering and Surface Phase Formation in Dilute Liquid Hg−Au Alloys

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Competition between Surface Layering and Surface Phase Formation in Dilute Liquid Hg−Au Alloys

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Title: Competition between Surface Layering and Surface Phase Formation in Dilute Liquid Hg−Au Alloys
Author: DiMasi, E.; Tostmann, H.; Ocko, B. M.; Pershan, Peter S.; Deutsch, M.

Note: Order does not necessarily reflect citation order of authors.

Citation: DiMasi, E., H. Tostmann, B. M. Ocko, Peter S. Pershan, and M. Deutsch. 1999. Competition between surface layering and surface phase formation in dilute liquid Hg−Au alloys. Journal of Physical Chemistry B 103(45): 9952–9959.
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Abstract: We present temperature-dependent X-ray reflectivity measurements of liquid Hg alloyed with 0.06−0.20 atom % Au. At low Au concentrations, we find temperature-dependent surface-induced layering similar to that observed in pure Hg, except that the presence of Au reduces the layering amplitude. Upon approaching the solubility limit of Au in Hg, a new surface phase forms which is 1−2 atomic diameters thick and has a density of about half that of bulk Hg. We present a surface phase diagram, summarizing the evolution of this unexpected surface structure upon varying composition and temperature. Such surface modifications may account for the variations observed in catalytic and electrochemical reactions at liquid metal surfaces upon alloying.
Published Version: doi:10.1021/jp9921553
Other Sources: http://liquids.seas.harvard.edu/peter/1999.pdf/99_5_HgAu.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4455228

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  • FAS Scholarly Articles [7374]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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