# Critical Casimir Effect in Three-Dimensional Ising Systems: Measurements on Binary Wetting Films

 Title: Critical Casimir Effect in Three-Dimensional Ising Systems: Measurements on Binary Wetting Films Author: Fukumo, Masafumi; Yano, Yohko F.; Pershan, Peter S. Note: Order does not necessarily reflect citation order of authors. Citation: Fukumo, Masafumi, Yohko F. Yano, and Peter S. Pershan. 2005. Critical Casimir effect in three-dimensional Ising systems: Measurements on binary wetting films. Physical Review Letters 94(135702). Access Status: Full text of the requested work is not available in DASH at this time (“dark deposit”). For more information on dark deposits, see our FAQ. Full Text & Related Files: Fukuto_Critical.pdf (381.7Kb; PDF) Abstract: The critical Casimir force (CF) is observed in thin wetting films of a binary liquid mixture close to the liquid/vapor coexistence. X-ray reflectivity shows thickness (L) enhancement near the bulk consolute point. The extracted Casimir amplitude $$\Delta_{+-}$$=3$$\pm$$1 agrees with the theoretical universal value for the antisymmetric 3D Ising films. The onset of CF in the one-phase region occurs at L/$$\xi \sim$$5 regardless of whether the bulk correlation length $$\xi$$ is varied with temperature or composition. The shape of the Casimir scaling function depends monotonically on the dimensionality. Published Version: doi: 10.1103/PhysRevLett.94.135702 Other Sources: http://liquids.seas.harvard.edu/peter/2005.pdf/casimir.pdf Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10354245 Downloads of this work: