TY - JOUR
T1 - Microscopic structure of the wetting film at the surface of liquid ga-bi alloys
AU - Tostmann, H.
AU - Di Masi, E.
AU - Shpyrko, O. G.
AU - Pershan, P. S.
AU - Ocko, B. M.
AU - Deutsch, M.
PY - 2000
Y1 - 2000
N2 - X-ray reflectivity measurements of the binary liquid Ga-Bi alloy reveal a dramatically different surface structure above and below the monotectic temperature mono = 222°C. A Gibbs-adsorbed Bi monolayer resides at the surface in both regimes. However, a 30 Å thick, Bi-rich wetting film intrudes between the Bi monolayer and the Ga-rich bulk for T > Tmono. The wetting film's internal structure, not hitherto measured, is determined with Å resolution, showing a concentration gradient not predicted by theory and a highly diffuse interface with the bulk phase.
AB - X-ray reflectivity measurements of the binary liquid Ga-Bi alloy reveal a dramatically different surface structure above and below the monotectic temperature mono = 222°C. A Gibbs-adsorbed Bi monolayer resides at the surface in both regimes. However, a 30 Å thick, Bi-rich wetting film intrudes between the Bi monolayer and the Ga-rich bulk for T > Tmono. The wetting film's internal structure, not hitherto measured, is determined with Å resolution, showing a concentration gradient not predicted by theory and a highly diffuse interface with the bulk phase.
UR - https://www.scopus.com/pages/publications/0001741401
U2 - 10.1103/PhysRevLett.84.4385
DO - 10.1103/PhysRevLett.84.4385
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AN - SCOPUS:0001741401
SN - 0031-9007
VL - 84
SP - 4385
EP - 4388
JO - Physical Review Letters
JF - Physical Review Letters
IS - 19
ER -