Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.30: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Three-body effects for critical Casimir forces — •Thiago Mattos^1,2, Ludger Harnau^1,2, and Dietrich Siegfried^1,2 — ¹Max Planck Institute for Intelligent Systems, Stuttgart, Germany — ²IV. Institute for Theoretical Physics, Stuttgart University, Germany

Within mean-field theory we calculate the scaling functions associated with critical Casimir forces for a system consisting of three spherical colloids immersed in a binary liquid mixture near its consolute point. For several geometrical arrangements and boundary conditions we analyze the effect on the critical Casimir force between a pair of colloids due to the presence of a third one. By subtracting the pairwise forces from the total force we are able to determine the many-body forces acting on one of the colloids. We have found that the many-body contribution to the total critical Casimir force is more pronounced for small colloid-colloid separations, as well as for temperatures close to criticality.