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Title: Microscopic Structure of the Wetting Film at the Surface of Liquid Ga-Bi Alloys

Abstract

X-ray reflectivity measurements of the binary liquid Ga-Bi alloy reveal a dramatically different surface structure above and below the monotectic temperature T{sub mono}=222 degree sign C . A Gibbs-adsorbed Bi monolayer resides at the surface in both regimes. However, a 30 Angstrom thick, Bi-rich wetting film intrudes between the Bi monolayer and the Ga-rich bulk for T>T{sub mono} . The wetting film's internal structure, not hitherto measured, is determined with Angstrom resolution, showing a concentration gradient not predicted by theory and a highly diffuse interface with the bulk phase. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [1];  [1];  [2];  [3]
  1. Division of Applied Sciences and Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
  2. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
  3. Department of Physics, Bar-Ilan University, Ramat-Gan 52100, (Israel)
Publication Date:
OSTI Identifier:
20216439
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 19; Other Information: PBD: 8 May 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GALLIUM ALLOYS; BISMUTH ALLOYS; LIQUID METALS; X-RAY DIFFRACTION; FILMS; ADSORPTION; INTERFACES; PHASE TRANSFORMATIONS; EXPERIMENTAL DATA

Citation Formats

Tostmann, H., DiMasi, E., Shpyrko, O. G., Pershan, P. S., Ocko, B. M., and Deutsch, M. Microscopic Structure of the Wetting Film at the Surface of Liquid Ga-Bi Alloys. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.84.4385.
Tostmann, H., DiMasi, E., Shpyrko, O. G., Pershan, P. S., Ocko, B. M., & Deutsch, M. Microscopic Structure of the Wetting Film at the Surface of Liquid Ga-Bi Alloys. United States. doi:10.1103/PhysRevLett.84.4385.
Tostmann, H., DiMasi, E., Shpyrko, O. G., Pershan, P. S., Ocko, B. M., and Deutsch, M. Mon . "Microscopic Structure of the Wetting Film at the Surface of Liquid Ga-Bi Alloys". United States. doi:10.1103/PhysRevLett.84.4385.
@article{osti_20216439,
title = {Microscopic Structure of the Wetting Film at the Surface of Liquid Ga-Bi Alloys},
author = {Tostmann, H. and DiMasi, E. and Shpyrko, O. G. and Pershan, P. S. and Ocko, B. M. and Deutsch, M.},
abstractNote = {X-ray reflectivity measurements of the binary liquid Ga-Bi alloy reveal a dramatically different surface structure above and below the monotectic temperature T{sub mono}=222 degree sign C . A Gibbs-adsorbed Bi monolayer resides at the surface in both regimes. However, a 30 Angstrom thick, Bi-rich wetting film intrudes between the Bi monolayer and the Ga-rich bulk for T>T{sub mono} . The wetting film's internal structure, not hitherto measured, is determined with Angstrom resolution, showing a concentration gradient not predicted by theory and a highly diffuse interface with the bulk phase. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.84.4385},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 19,
volume = 84,
place = {United States},
year = {2000},
month = {5}
}