Date of Original Version
Cahn’s general argument for complete wetting in the vicinity of critical points is critically reviewed. Critical-point wetting does occur in systems with short-range (exponentially decaying) forces. Whenever short-range forces favor wetting, while at the same time there is a tendency towards drying due to weak long-range (algebraically decaying) forces, neither critical-point wetting nor drying takes place. In this case the thickness of the partial wetting layer diverges as the bulk correlation length upon approach of the critical point.
Nightingale, M. P., & Indekeu, J. O. (1985). Examination of the necessity of complete wetting near critical points in systems with long-range forces. Physical Review B, 32(5), 3364-3366. doi: 10.1103/PhysRevB.32.3364
Available at: http://dx.doi.org/10.1103/PhysRevB.32.3364