TY - JOUR
T1 - Tunable surface phases in alcohol-diol melts
AU - Gang, O.
AU - Ocko, B. M.
AU - Wu, X. Z.
AU - Sirota, E. B.
AU - Deutsch, M.
PY - 1999
Y1 - 1999
N2 - Surface crystallization is studied in mixed alcohol-diol melts by x-ray diffraction and surface tensiometry. A reversible transition, having no bulk counterpart, from a bilayer to a monolayer surface phase, tunable by either diol concentration φ or temperature T, is observed. The molecular tilt is found to vary with φ in the bilayer phase. The structure of both surface phases is determined in detail. A simple theory, assuming a linearized φ dependence of the free energies of the various interfaces in each phase, accounts well for the observed (φ, T) phase diagram.
AB - Surface crystallization is studied in mixed alcohol-diol melts by x-ray diffraction and surface tensiometry. A reversible transition, having no bulk counterpart, from a bilayer to a monolayer surface phase, tunable by either diol concentration φ or temperature T, is observed. The molecular tilt is found to vary with φ in the bilayer phase. The structure of both surface phases is determined in detail. A simple theory, assuming a linearized φ dependence of the free energies of the various interfaces in each phase, accounts well for the observed (φ, T) phase diagram.
UR - http://www.scopus.com/inward/record.url?scp=0001365939&partnerID=8YFLogxK
U2 - 10.1103/physrevlett.82.588
DO - 10.1103/physrevlett.82.588
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AN - SCOPUS:0001365939
SN - 0031-9007
VL - 82
SP - 588
EP - 591
JO - Physical Review Letters
JF - Physical Review Letters
IS - 3
ER -