Argonne National Laboratory

Advanced Photon Source
Sector 9

Argonne Home > Advanced Photon Source >

Pairing interactions and Gibbs adsorption at the liquid Bi-In surface: A resonant x-ray reflectivity study


DiMasi E, Tostmann H, Shpyrko OG, Huber P, Ocko BM, Pershan PS, Deutsch M, Berman LE

PHYSICAL REVIEW LETTERS
86 (8): 1538-1541 FEB 19 2001
View Full Text (.pdf)

Abstract:
Resonant x-ray reflectivity measurements from the surface of liquid Bi22In78 find only a modest surface Bi enhancement, with 35 at.% Bi in the first atomic layer. This is in contrast to the Gibbs adsorption in all liquid alloys studied to date, which show surface segregation of a complete monolayer of the low surface tension component. This suggests that surface adsorption in Bi-In is dominated by attractive interactions that increase the number of Bi-In neighbors at the surface. These are the first measurements in which resonant x-ray scattering has been used to quantify compositional changes induced at a liquid alloy surface.

U.S. Department of Energy UChicago Argonne LLC Office of Science - Department of EnergyOffice of Basic Energy Sciences - Department of Energy
Privacy & Security Notice | Contact Us | Site Map