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

被引：36

作者：

DiMasi, E ^{[1
]}

Tostmann, H

Shpyrko, OG

Huber, P

Ocko, BM

Pershan, PS

Deutsch, M

Berman, LE

机构：

[1] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[2] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[4] Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel

[5] Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.86.1538

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：1538 / 1541

页数：4

共 25 条

[1] SURFACE-TENSION, COMPRESSIBILITY, AND SURFACE SEGREGATION IN LIQUID BINARY-ALLOYS [J].