title: Critical Casimir forces in colloidal suspensions on chemically patterned surfaces.
abstract: We investigate the behavior of colloidal particles immersed in a binary liquid mixture of water and 2,6-lutidine in the presence of a chemically patterned substrate. Close to the critical point of the mixture, the particles are subjected to critical Casimir interactions with force components normal and parallel to the surface. Because the strength and sign of these interactions can be tuned by variations in the surface properties and the mixtures temperature, critical Casimir forces allow the formation of highly ordered monolayers but also extend the use of colloids as model systems.
authors.affiliation: 2. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Soyka
authors.forename: Olga
authors.initials: O
authors.lastname: Zvyagolskaya
authors.forename: Christopher
authors.initials: C
authors.lastname: Hertlein
authors.forename: Laurent
authors.initials: L
authors.lastname: Helden
authors.forename: Clemens
authors.initials: C
authors.lastname: Bechinger