Pairing Interactions and Gibbs Adsorption at the Liquid Bi-In Surface: A Resonant X-Ray Reflectivity Study

Journal Article · Mon Feb 19 00:00:00 EST 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.86.1538· OSTI ID:40205831

DiMasi, E; Tostmann, H; Shpyrko, O G; Huber, P; Ocko, B M; Pershan, P S; Deutsch, M; Berman, L E

Resonant x-ray reflectivity measurements from the surface of liquid Bi{sub 22}In {sub 78} 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.

• Sponsoring Organization: (US)
• OSTI ID: 40205831
• Journal Information: Physical Review Letters, Vol. 86, Issue 8; Other Information: DOI: 10.1103/PhysRevLett.86.1538; Othernumber: PRLTAO000086000008001538000001; 050107PRL; PBD: 19 Feb 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ADSORPTION
ALLOYS
PAIRING INTERACTIONS
REFLECTIVITY
SCATTERING
SEGREGATION
SURFACE TENSION